#import "SMCalloutView.h" // // UIView frame helpers - we do a lot of UIView frame fiddling in this class; these functions help keep things readable. // @interface UIView (SMFrameAdditions) @property (nonatomic, assign) CGPoint frameOrigin; @property (nonatomic, assign) CGSize frameSize; @property (nonatomic, assign) CGFloat frameX, frameY, frameWidth, frameHeight; // normal rect properties @property (nonatomic, assign) CGFloat frameLeft, frameTop, frameRight, frameBottom; // these will stretch/shrink the rect @end // // Callout View. // #define CALLOUT_DEFAULT_CONTAINER_HEIGHT 44 // height of just the main portion without arrow #define CALLOUT_SUB_DEFAULT_CONTAINER_HEIGHT 52 // height of just the main portion without arrow (when subtitle is present) #define CALLOUT_MIN_WIDTH 61 // minimum width of system callout #define TITLE_HMARGIN 12 // the title/subtitle view's normal horizontal margin from the edges of our callout view or from the accessories #define TITLE_TOP 11 // the top of the title view when no subtitle is present #define TITLE_SUB_TOP 4 // the top of the title view when a subtitle IS present #define TITLE_HEIGHT 21 // title height, fixed #define SUBTITLE_TOP 28 // the top of the subtitle, when present #define SUBTITLE_HEIGHT 15 // subtitle height, fixed #define BETWEEN_ACCESSORIES_MARGIN 7 // margin between accessories when no title/subtitle is present #define TOP_ANCHOR_MARGIN 13 // all the above measurements assume a bottom anchor! if we're pointing "up" we'll need to add this top margin to everything. #define COMFORTABLE_MARGIN 10 // when we try to reposition content to be visible, we'll consider this margin around your target rect NSTimeInterval const kMGLSMCalloutViewRepositionDelayForUIScrollView = 1.0/3.0; @interface MGLSMCalloutView () @property (nonatomic, strong) UIButton *containerView; // for masking and interaction @property (nonatomic, strong) UILabel *titleLabel, *subtitleLabel; @property (nonatomic, assign) MGLSMCalloutArrowDirection currentArrowDirection; @property (nonatomic, assign) BOOL popupCancelled; @end @implementation MGLSMCalloutView + (MGLSMCalloutView *)platformCalloutView { // MGL: Mapbox does not need or include the custom flavor, so this is modified to just use SMCalloutView. return [MGLSMCalloutView new]; } - (id)initWithFrame:(CGRect)frame { if (self = [super initWithFrame:frame]) { self.permittedArrowDirection = MGLSMCalloutArrowDirectionDown; self.presentAnimation = MGLSMCalloutAnimationBounce; self.dismissAnimation = MGLSMCalloutAnimationFade; self.backgroundColor = [UIColor clearColor]; self.containerView = [UIButton new]; self.containerView.isAccessibilityElement = NO; self.isAccessibilityElement = NO; self.contentViewInset = UIEdgeInsetsMake(12, 12, 12, 12); [self.containerView addTarget:self action:@selector(highlightIfNecessary) forControlEvents:UIControlEventTouchDown | UIControlEventTouchDragInside]; [self.containerView addTarget:self action:@selector(unhighlightIfNecessary) forControlEvents:UIControlEventTouchDragOutside | UIControlEventTouchCancel | UIControlEventTouchUpOutside | UIControlEventTouchUpInside]; [self.containerView addTarget:self action:@selector(calloutClicked) forControlEvents:UIControlEventTouchUpInside]; } return self; } - (BOOL)supportsHighlighting { if (![self.delegate respondsToSelector:@selector(calloutViewClicked:)]) return NO; if ([self.delegate respondsToSelector:@selector(calloutViewShouldHighlight:)]) return [self.delegate calloutViewShouldHighlight:self]; return YES; } - (void)highlightIfNecessary { if (self.supportsHighlighting) self.backgroundView.highlighted = YES; } - (void)unhighlightIfNecessary { if (self.supportsHighlighting) self.backgroundView.highlighted = NO; } - (void)calloutClicked { if ([self.delegate respondsToSelector:@selector(calloutViewClicked:)]) [self.delegate calloutViewClicked:self]; } - (UIView *)titleViewOrDefault { if (self.titleView) // if you have a custom title view defined, return that. return self.titleView; else { if (!self.titleLabel) { // create a default titleView self.titleLabel = [UILabel new]; self.titleLabel.frameHeight = TITLE_HEIGHT; self.titleLabel.opaque = NO; self.titleLabel.backgroundColor = [UIColor clearColor]; self.titleLabel.font = [UIFont systemFontOfSize:17]; self.titleLabel.textColor = [UIColor blackColor]; } return self.titleLabel; } } - (UIView *)subtitleViewOrDefault { if (self.subtitleView) // if you have a custom subtitle view defined, return that. return self.subtitleView; else { if (!self.subtitleLabel) { // create a default subtitleView self.subtitleLabel = [UILabel new]; self.subtitleLabel.frameHeight = SUBTITLE_HEIGHT; self.subtitleLabel.opaque = NO; self.subtitleLabel.backgroundColor = [UIColor clearColor]; self.subtitleLabel.font = [UIFont systemFontOfSize:12]; self.subtitleLabel.textColor = [UIColor blackColor]; } return self.subtitleLabel; } } - (MGLSMCalloutBackgroundView *)backgroundView { // create our default background on first access only if it's nil, since you might have set your own background anyway. return _backgroundView ? _backgroundView : (_backgroundView = [self defaultBackgroundView]); } - (MGLSMCalloutBackgroundView *)defaultBackgroundView { return [MGLSMCalloutMaskedBackgroundView new]; } - (void)rebuildSubviews { // remove and re-add our appropriate subviews in the appropriate order [self.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)]; [self.containerView.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)]; [self setNeedsDisplay]; [self addSubview:self.backgroundView]; [self addSubview:self.containerView]; if (self.contentView) { [self.containerView addSubview:self.contentView]; } else { if (self.titleViewOrDefault) [self.containerView addSubview:self.titleViewOrDefault]; if (self.subtitleViewOrDefault) [self.containerView addSubview:self.subtitleViewOrDefault]; } if (self.leftAccessoryView) [self.containerView addSubview:self.leftAccessoryView]; if (self.rightAccessoryView) [self.containerView addSubview:self.rightAccessoryView]; } // Accessory margins. Accessories are centered vertically when shorter // than the callout, otherwise they grow from the upper corner. - (CGFloat)leftAccessoryVerticalMargin { if (self.leftAccessoryView.frameHeight < self.calloutContainerHeight) return roundf((self.calloutContainerHeight - self.leftAccessoryView.frameHeight) / 2); else return 0; } - (CGFloat)leftAccessoryHorizontalMargin { return fminf(self.leftAccessoryVerticalMargin, TITLE_HMARGIN); } - (CGFloat)rightAccessoryVerticalMargin { if (self.rightAccessoryView.frameHeight < self.calloutContainerHeight) return roundf((self.calloutContainerHeight - self.rightAccessoryView.frameHeight) / 2); else return 0; } - (CGFloat)rightAccessoryHorizontalMargin { return fminf(self.rightAccessoryVerticalMargin, TITLE_HMARGIN); } - (CGFloat)innerContentMarginLeft { if (self.leftAccessoryView) return self.leftAccessoryHorizontalMargin + self.leftAccessoryView.frameWidth + TITLE_HMARGIN; else return self.contentViewInset.left; } - (CGFloat)innerContentMarginRight { if (self.rightAccessoryView) return self.rightAccessoryHorizontalMargin + self.rightAccessoryView.frameWidth + TITLE_HMARGIN; else return self.contentViewInset.right; } - (CGFloat)calloutHeight { return self.calloutContainerHeight + self.backgroundView.anchorHeight; } - (CGFloat)calloutContainerHeight { if (self.contentView) return self.contentView.frameHeight + self.contentViewInset.bottom + self.contentViewInset.top; else if (self.subtitleView || self.subtitle.length > 0) return CALLOUT_SUB_DEFAULT_CONTAINER_HEIGHT; else return CALLOUT_DEFAULT_CONTAINER_HEIGHT; } - (CGSize)sizeThatFits:(CGSize)size { // calculate how much non-negotiable space we need to reserve for margin and accessories CGFloat margin = self.innerContentMarginLeft + self.innerContentMarginRight; // how much room is left for text? CGFloat availableWidthForText = size.width - margin - 1; // no room for text? then we'll have to squeeze into the given size somehow. if (availableWidthForText < 0) availableWidthForText = 0; CGSize preferredTitleSize = [self.titleViewOrDefault sizeThatFits:CGSizeMake(availableWidthForText, TITLE_HEIGHT)]; CGSize preferredSubtitleSize = [self.subtitleViewOrDefault sizeThatFits:CGSizeMake(availableWidthForText, SUBTITLE_HEIGHT)]; // total width we'd like CGFloat preferredWidth; if (self.contentView) { // if we have a content view, then take our preferred size directly from that preferredWidth = self.contentView.frameWidth + margin; } else if (preferredTitleSize.width >= 0.000001 || preferredSubtitleSize.width >= 0.000001) { // if we have a title or subtitle, then our assumed margins are valid, and we can apply them preferredWidth = fmaxf(preferredTitleSize.width, preferredSubtitleSize.width) + margin; } else { // ok we have no title or subtitle to speak of. In this case, the system callout would actually not display // at all! But we can handle it. preferredWidth = self.leftAccessoryView.frameWidth + self.rightAccessoryView.frameWidth + self.leftAccessoryHorizontalMargin + self.rightAccessoryHorizontalMargin; if (self.leftAccessoryView && self.rightAccessoryView) preferredWidth += BETWEEN_ACCESSORIES_MARGIN; } // ensure we're big enough to fit our graphics! preferredWidth = fmaxf(preferredWidth, CALLOUT_MIN_WIDTH); // ask to be smaller if we have space, otherwise we'll fit into what we have by truncating the title/subtitle. return CGSizeMake(fminf(preferredWidth, size.width), self.calloutHeight); } - (CGSize)offsetToContainRect:(CGRect)innerRect inRect:(CGRect)outerRect { CGFloat nudgeRight = fmaxf(0, CGRectGetMinX(outerRect) - CGRectGetMinX(innerRect)); CGFloat nudgeLeft = fminf(0, CGRectGetMaxX(outerRect) - CGRectGetMaxX(innerRect)); CGFloat nudgeTop = fmaxf(0, CGRectGetMinY(outerRect) - CGRectGetMinY(innerRect)); CGFloat nudgeBottom = fminf(0, CGRectGetMaxY(outerRect) - CGRectGetMaxY(innerRect)); return CGSizeMake(nudgeLeft ? nudgeLeft : nudgeRight, nudgeTop ? nudgeTop : nudgeBottom); } - (void)presentCalloutFromRect:(CGRect)rect inView:(UIView *)view constrainedToView:(UIView *)constrainedView animated:(BOOL)animated { [self presentCalloutFromRect:rect inLayer:view.layer ofView:view constrainedToLayer:constrainedView.layer animated:animated]; } - (void)presentCalloutFromRect:(CGRect)rect inLayer:(CALayer *)layer constrainedToLayer:(CALayer *)constrainedLayer animated:(BOOL)animated { [self presentCalloutFromRect:rect inLayer:layer ofView:nil constrainedToLayer:constrainedLayer animated:animated]; } // this private method handles both CALayer and UIView parents depending on what's passed. - (void)presentCalloutFromRect:(CGRect)rect inLayer:(CALayer *)layer ofView:(UIView *)view constrainedToLayer:(CALayer *)constrainedLayer animated:(BOOL)animated { // Sanity check: dismiss this callout immediately if it's displayed somewhere if (self.layer.superlayer) [self dismissCalloutAnimated:NO]; // cancel all animations that may be in progress [self.layer removeAnimationForKey:@"present"]; [self.layer removeAnimationForKey:@"dismiss"]; // figure out the constrained view's rect in our popup view's coordinate system CGRect constrainedRect = [constrainedLayer convertRect:constrainedLayer.bounds toLayer:layer]; // apply our edge constraints constrainedRect = UIEdgeInsetsInsetRect(constrainedRect, self.constrainedInsets); constrainedRect = CGRectInset(constrainedRect, COMFORTABLE_MARGIN, COMFORTABLE_MARGIN); // form our subviews based on our content set so far [self rebuildSubviews]; // apply title/subtitle (if present self.titleLabel.text = self.title; self.subtitleLabel.text = self.subtitle; // size the callout to fit the width constraint as best as possible self.frameSize = [self sizeThatFits:CGSizeMake(constrainedRect.size.width, self.calloutHeight)]; // how much room do we have in the constraint box, both above and below our target rect? CGFloat topSpace = CGRectGetMinY(rect) - CGRectGetMinY(constrainedRect); CGFloat bottomSpace = CGRectGetMaxY(constrainedRect) - CGRectGetMaxY(rect); // we prefer to point our arrow down. MGLSMCalloutArrowDirection bestDirection = MGLSMCalloutArrowDirectionDown; // we'll point it up though if that's the only option you gave us. if (self.permittedArrowDirection == MGLSMCalloutArrowDirectionUp) bestDirection = MGLSMCalloutArrowDirectionUp; // or, if we don't have enough space on the top and have more space on the bottom, and you // gave us a choice, then pointing up is the better option. if (self.permittedArrowDirection == MGLSMCalloutArrowDirectionAny && topSpace < self.calloutHeight && bottomSpace > topSpace) bestDirection = MGLSMCalloutArrowDirectionUp; self.currentArrowDirection = bestDirection; // we want to point directly at the horizontal center of the given rect. calculate our "anchor point" in terms of our // target view's coordinate system. make sure to offset the anchor point as requested if necessary. CGFloat anchorX = self.calloutOffset.x + CGRectGetMidX(rect); CGFloat anchorY = self.calloutOffset.y + (bestDirection == MGLSMCalloutArrowDirectionDown ? CGRectGetMinY(rect) : CGRectGetMaxY(rect)); // we prefer to sit centered directly above our anchor CGFloat calloutX = roundf(anchorX - self.frameWidth / 2); // but not if it's going to get too close to the edge of our constraints if (calloutX < constrainedRect.origin.x) calloutX = constrainedRect.origin.x; if (calloutX > constrainedRect.origin.x+constrainedRect.size.width-self.frameWidth) calloutX = constrainedRect.origin.x+constrainedRect.size.width-self.frameWidth; // what's the farthest to the left and right that we could point to, given our background image constraints? CGFloat minPointX = calloutX + self.backgroundView.anchorMargin; CGFloat maxPointX = calloutX + self.frameWidth - self.backgroundView.anchorMargin; // we may need to scoot over to the left or right to point at the correct spot CGFloat adjustX = 0; if (anchorX < minPointX) adjustX = anchorX - minPointX; if (anchorX > maxPointX) adjustX = anchorX - maxPointX; // add the callout to the given layer (or view if possible, to receive touch events) if (view) [view addSubview:self]; else [layer addSublayer:self.layer]; CGPoint calloutOrigin = { .x = calloutX + adjustX, .y = bestDirection == MGLSMCalloutArrowDirectionDown ? (anchorY - self.calloutHeight) : anchorY }; self.frameOrigin = calloutOrigin; // now set the *actual* anchor point for our layer so that our "popup" animation starts from this point. CGPoint anchorPoint = [layer convertPoint:CGPointMake(anchorX, anchorY) toLayer:self.layer]; // pass on the anchor point to our background view so it knows where to draw the arrow self.backgroundView.arrowPoint = anchorPoint; // adjust it to unit coordinates for the actual layer.anchorPoint property anchorPoint.x /= self.frameWidth; anchorPoint.y /= self.frameHeight; self.layer.anchorPoint = anchorPoint; // setting the anchor point moves the view a bit, so we need to reset self.frameOrigin = calloutOrigin; // make sure our frame is not on half-pixels or else we may be blurry! CGFloat scale = [UIScreen mainScreen].scale; self.frameX = floorf(self.frameX*scale)/scale; self.frameY = floorf(self.frameY*scale)/scale; // layout now so we can immediately start animating to the final position if needed [self setNeedsLayout]; [self layoutIfNeeded]; // if we're outside the bounds of our constraint rect, we'll give our delegate an opportunity to shift us into position. // consider both our size and the size of our target rect (which we'll assume to be the size of the content you want to scroll into view. CGRect contentRect = CGRectUnion(self.frame, rect); CGSize offset = [self offsetToContainRect:contentRect inRect:constrainedRect]; NSTimeInterval delay = 0; self.popupCancelled = NO; // reset this before calling our delegate below if ([self.delegate respondsToSelector:@selector(calloutView:delayForRepositionWithSize:)] && !CGSizeEqualToSize(offset, CGSizeZero)) delay = [self.delegate calloutView:(id)self delayForRepositionWithSize:offset]; // there's a chance that user code in the delegate method may have called -dismissCalloutAnimated to cancel things; if that // happened then we need to bail! if (self.popupCancelled) return; // now we want to mask our contents to our background view (if requested) to match the iOS 7 style self.containerView.layer.mask = self.backgroundView.contentMask; // if we need to delay, we don't want to be visible while we're delaying, so hide us in preparation for our popup self.hidden = YES; // create the appropriate animation, even if we're not animated CAAnimation *animation = [self animationWithType:self.presentAnimation presenting:YES]; // nuke the duration if no animation requested - we'll still need to "run" the animation to get delays and callbacks if (!animated) animation.duration = 0.0000001; // can't be zero or the animation won't "run" animation.beginTime = CACurrentMediaTime() + delay; animation.delegate = self; [self.layer addAnimation:animation forKey:@"present"]; } - (void)animationDidStart:(CAAnimation *)anim { BOOL presenting = [[anim valueForKey:@"presenting"] boolValue]; if (presenting) { if ([_delegate respondsToSelector:@selector(calloutViewWillAppear:)]) [_delegate calloutViewWillAppear:(id)self]; // ok, animation is on, let's make ourselves visible! self.hidden = NO; } else if (!presenting) { if ([_delegate respondsToSelector:@selector(calloutViewWillDisappear:)]) [_delegate calloutViewWillDisappear:(id)self]; } } - (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)finished { BOOL presenting = [[anim valueForKey:@"presenting"] boolValue]; if (presenting && finished) { if ([_delegate respondsToSelector:@selector(calloutViewDidAppear:)]) [_delegate calloutViewDidAppear:(id)self]; } else if (!presenting && finished) { [self removeFromParent]; [self.layer removeAnimationForKey:@"dismiss"]; if ([_delegate respondsToSelector:@selector(calloutViewDidDisappear:)]) [_delegate calloutViewDidDisappear:(id)self]; } } - (void)dismissCalloutAnimated:(BOOL)animated { // cancel all animations that may be in progress [self.layer removeAnimationForKey:@"present"]; [self.layer removeAnimationForKey:@"dismiss"]; self.popupCancelled = YES; if (animated) { CAAnimation *animation = [self animationWithType:self.dismissAnimation presenting:NO]; animation.delegate = self; [self.layer addAnimation:animation forKey:@"dismiss"]; } else { [self removeFromParent]; } } - (void)removeFromParent { if (self.superview) [self removeFromSuperview]; else { // removing a layer from a superlayer causes an implicit fade-out animation that we wish to disable. [CATransaction begin]; [CATransaction setDisableActions:YES]; [self.layer removeFromSuperlayer]; [CATransaction commit]; } } - (CAAnimation *)animationWithType:(MGLSMCalloutAnimation)type presenting:(BOOL)presenting { CAAnimation *animation = nil; if (type == MGLSMCalloutAnimationBounce) { CABasicAnimation *fade = [CABasicAnimation animationWithKeyPath:@"opacity"]; fade.duration = 0.23; fade.fromValue = presenting ? @0.0 : @1.0; fade.toValue = presenting ? @1.0 : @0.0; fade.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]; CABasicAnimation *bounce = [CABasicAnimation animationWithKeyPath:@"transform.scale"]; bounce.duration = 0.23; bounce.fromValue = presenting ? @0.7 : @1.0; bounce.toValue = presenting ? @1.0 : @0.7; bounce.timingFunction = [CAMediaTimingFunction functionWithControlPoints:0.59367:0.12066:0.18878:1.5814]; CAAnimationGroup *group = [CAAnimationGroup animation]; group.animations = @[fade, bounce]; group.duration = 0.23; animation = group; } else if (type == MGLSMCalloutAnimationFade) { CABasicAnimation *fade = [CABasicAnimation animationWithKeyPath:@"opacity"]; fade.duration = 1.0/3.0; fade.fromValue = presenting ? @0.0 : @1.0; fade.toValue = presenting ? @1.0 : @0.0; animation = fade; } else if (type == MGLSMCalloutAnimationStretch) { CABasicAnimation *stretch = [CABasicAnimation animationWithKeyPath:@"transform.scale"]; stretch.duration = 0.1; stretch.fromValue = presenting ? @0.0 : @1.0; stretch.toValue = presenting ? @1.0 : @0.0; animation = stretch; } // CAAnimation is KVC compliant, so we can store whether we're presenting for lookup in our delegate methods [animation setValue:@(presenting) forKey:@"presenting"]; animation.fillMode = kCAFillModeForwards; animation.removedOnCompletion = NO; return animation; } - (void)layoutSubviews { self.containerView.frame = self.bounds; self.backgroundView.frame = self.bounds; // if we're pointing up, we'll need to push almost everything down a bit CGFloat dy = self.currentArrowDirection == MGLSMCalloutArrowDirectionUp ? TOP_ANCHOR_MARGIN : 0; self.titleViewOrDefault.frameX = self.innerContentMarginLeft; self.titleViewOrDefault.frameY = (self.subtitleView || self.subtitle.length ? TITLE_SUB_TOP : TITLE_TOP) + dy; self.titleViewOrDefault.frameWidth = self.frameWidth - self.innerContentMarginLeft - self.innerContentMarginRight; self.subtitleViewOrDefault.frameX = self.titleViewOrDefault.frameX; self.subtitleViewOrDefault.frameY = SUBTITLE_TOP + dy; self.subtitleViewOrDefault.frameWidth = self.titleViewOrDefault.frameWidth; self.leftAccessoryView.frameX = self.leftAccessoryHorizontalMargin; self.leftAccessoryView.frameY = self.leftAccessoryVerticalMargin + dy; self.rightAccessoryView.frameX = self.frameWidth - self.rightAccessoryHorizontalMargin - self.rightAccessoryView.frameWidth; self.rightAccessoryView.frameY = self.rightAccessoryVerticalMargin + dy; if (self.contentView) { self.contentView.frameX = self.innerContentMarginLeft; self.contentView.frameY = self.contentViewInset.top + dy; } } #pragma mark - Accessibility - (NSInteger)accessibilityElementCount { return (!!self.leftAccessoryView + !!self.titleViewOrDefault + !!self.subtitleViewOrDefault + !!self.rightAccessoryView); } - (id)accessibilityElementAtIndex:(NSInteger)index { if (index == 0) { return self.leftAccessoryView ? self.leftAccessoryView : self.titleViewOrDefault; } if (index == 1) { return self.leftAccessoryView ? self.titleViewOrDefault : self.subtitleViewOrDefault; } if (index == 2) { return self.leftAccessoryView ? self.subtitleViewOrDefault : self.rightAccessoryView; } if (index == 3) { return self.leftAccessoryView ? self.rightAccessoryView : nil; } return nil; } - (NSInteger)indexOfAccessibilityElement:(id)element { if (element == nil) return NSNotFound; if (element == self.leftAccessoryView) return 0; if (element == self.titleViewOrDefault) { return self.leftAccessoryView ? 1 : 0; } if (element == self.subtitleViewOrDefault) { return self.leftAccessoryView ? 2 : 1; } if (element == self.rightAccessoryView) { return self.leftAccessoryView ? 3 : 2; } return NSNotFound; } @end // import this known "private API" from SMCalloutBackgroundView @interface MGLSMCalloutBackgroundView (EmbeddedImages) + (UIImage *)embeddedImageNamed:(NSString *)name; @end // // Callout Background View. // @interface MGLSMCalloutMaskedBackgroundView () @property (nonatomic, strong) UIView *containerView, *containerBorderView, *arrowView; @property (nonatomic, strong) UIImageView *arrowImageView, *arrowHighlightedImageView, *arrowBorderView; @end static UIImage *blackArrowImage = nil, *whiteArrowImage = nil, *grayArrowImage = nil; @implementation MGLSMCalloutMaskedBackgroundView - (id)initWithFrame:(CGRect)frame { if (self = [super initWithFrame:frame]) { // Here we're mimicking the very particular (and odd) structure of the system callout view. // The hierarchy and view/layer values were discovered by inspecting map kit using Reveal.app self.containerView = [UIView new]; self.containerView.backgroundColor = [UIColor whiteColor]; self.containerView.alpha = 0.96; self.containerView.layer.cornerRadius = 8; self.containerView.layer.shadowRadius = 30; self.containerView.layer.shadowOpacity = 0.1; self.containerBorderView = [UIView new]; self.containerBorderView.layer.borderColor = [UIColor colorWithWhite:0 alpha:0.1].CGColor; self.containerBorderView.layer.borderWidth = 0.5; self.containerBorderView.layer.cornerRadius = 8.5; if (!blackArrowImage) { blackArrowImage = [MGLSMCalloutBackgroundView embeddedImageNamed:@"CalloutArrow"]; whiteArrowImage = [self image:blackArrowImage withColor:[UIColor whiteColor]]; grayArrowImage = [self image:blackArrowImage withColor:[UIColor colorWithWhite:0.85 alpha:1]]; } self.anchorHeight = 13; self.anchorMargin = 27; self.arrowView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, blackArrowImage.size.width, blackArrowImage.size.height)]; self.arrowView.alpha = 0.96; self.arrowImageView = [[UIImageView alloc] initWithImage:whiteArrowImage]; self.arrowHighlightedImageView = [[UIImageView alloc] initWithImage:grayArrowImage]; self.arrowHighlightedImageView.hidden = YES; self.arrowBorderView = [[UIImageView alloc] initWithImage:blackArrowImage]; self.arrowBorderView.alpha = 0.1; self.arrowBorderView.frameY = 0.5; [self addSubview:self.containerView]; [self.containerView addSubview:self.containerBorderView]; [self addSubview:self.arrowView]; [self.arrowView addSubview:self.arrowBorderView]; [self.arrowView addSubview:self.arrowImageView]; [self.arrowView addSubview:self.arrowHighlightedImageView]; } return self; } // Make sure we relayout our images when our arrow point changes! - (void)setArrowPoint:(CGPoint)arrowPoint { [super setArrowPoint:arrowPoint]; [self setNeedsLayout]; } - (void)setHighlighted:(BOOL)highlighted { [super setHighlighted:highlighted]; self.containerView.backgroundColor = highlighted ? [UIColor colorWithWhite:0.85 alpha:1] : [UIColor whiteColor]; self.arrowImageView.hidden = highlighted; self.arrowHighlightedImageView.hidden = !highlighted; } - (UIImage *)image:(UIImage *)image withColor:(UIColor *)color { UIGraphicsBeginImageContextWithOptions(image.size, NO, 0); CGRect imageRect = (CGRect){.size=image.size}; CGContextRef c = UIGraphicsGetCurrentContext(); CGContextTranslateCTM(c, 0, image.size.height); CGContextScaleCTM(c, 1, -1); CGContextClipToMask(c, imageRect, image.CGImage); [color setFill]; CGContextFillRect(c, imageRect); UIImage *whiteImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return whiteImage; } - (void)layoutSubviews { BOOL pointingUp = self.arrowPoint.y < self.frameHeight/2; // if we're pointing up, we'll need to push almost everything down a bit CGFloat dy = pointingUp ? TOP_ANCHOR_MARGIN : 0; self.containerView.frame = CGRectMake(0, dy, self.frameWidth, self.frameHeight - self.arrowView.frameHeight + 0.5); self.containerBorderView.frame = CGRectInset(self.containerView.bounds, -0.5, -0.5); self.arrowView.frameX = roundf(self.arrowPoint.x - self.arrowView.frameWidth / 2); if (pointingUp) { self.arrowView.frameY = 1; self.arrowView.transform = CGAffineTransformMakeRotation(M_PI); } else { self.arrowView.frameY = self.containerView.frameHeight - 0.5; self.arrowView.transform = CGAffineTransformIdentity; } } - (CALayer *)contentMask { UIGraphicsBeginImageContextWithOptions(self.bounds.size, NO, 0); [self.layer renderInContext:UIGraphicsGetCurrentContext()]; UIImage *maskImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); CALayer *layer = [CALayer layer]; layer.frame = self.bounds; layer.contents = (id)maskImage.CGImage; return layer; } @end @implementation MGLSMCalloutBackgroundView + (NSData *)dataWithBase64EncodedString:(NSString *)string { // // NSData+Base64.m // // Version 1.0.2 // // Created by Nick Lockwood on 12/01/2012. // Copyright (C) 2012 Charcoal Design // // Distributed under the permissive zlib License // Get the latest version from here: // // https://github.com/nicklockwood/Base64 // // This software is provided 'as-is', without any express or implied // warranty. In no event will the authors be held liable for any damages // arising from the use of this software. // // Permission is granted to anyone to use this software for any purpose, // including commercial applications, and to alter it and redistribute it // freely, subject to the following restrictions: // // 1. The origin of this software must not be misrepresented; you must not // claim that you wrote the original software. If you use this software // in a product, an acknowledgment in the product documentation would be // appreciated but is not required. // // 2. Altered source versions must be plainly marked as such, and must not be // misrepresented as being the original software. // // 3. This notice may not be removed or altered from any source distribution. // const char lookup[] = { 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 62, 99, 99, 99, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 99, 99, 99, 99, 99, 99, 99, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 99, 99, 99, 99, 99, 99, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 99, 99, 99, 99, 99 }; NSData *inputData = [string dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES]; long long inputLength = [inputData length]; const unsigned char *inputBytes = [inputData bytes]; long long maxOutputLength = (inputLength / 4 + 1) * 3; NSMutableData *outputData = [NSMutableData dataWithLength:(NSUInteger)maxOutputLength]; unsigned char *outputBytes = (unsigned char *)[outputData mutableBytes]; int accumulator = 0; long long outputLength = 0; unsigned char accumulated[] = {0, 0, 0, 0}; for (long long i = 0; i < inputLength; i++) { unsigned char decoded = lookup[inputBytes[i] & 0x7F]; if (decoded != 99) { accumulated[accumulator] = decoded; if (accumulator == 3) { outputBytes[outputLength++] = (accumulated[0] << 2) | (accumulated[1] >> 4); outputBytes[outputLength++] = (accumulated[1] << 4) | (accumulated[2] >> 2); outputBytes[outputLength++] = (accumulated[2] << 6) | accumulated[3]; } accumulator = (accumulator + 1) % 4; } } //handle left-over data if (accumulator > 0) outputBytes[outputLength] = (accumulated[0] << 2) | (accumulated[1] >> 4); if (accumulator > 1) outputBytes[++outputLength] = (accumulated[1] << 4) | (accumulated[2] >> 2); if (accumulator > 2) outputLength++; //truncate data to match actual output length outputData.length = (NSUInteger)outputLength; return outputLength? outputData: nil; } + (UIImage *)embeddedImageNamed:(NSString *)name { CGFloat screenScale = [UIScreen mainScreen].scale; if (screenScale > 1.0) { name = [name stringByAppendingString:@"_2x"]; screenScale = 2.0; } SEL selector = NSSelectorFromString(name); if (![(id)self respondsToSelector:selector]) { NSLog(@"Could not find an embedded image. Ensure that you've added a class-level method named +%@", name); return nil; } // We need to hush the compiler here - but we know what we're doing! #pragma clang diagnostic push #pragma clang diagnostic ignored "-Warc-performSelector-leaks" NSString *base64String = [(id)self performSelector:selector]; #pragma clang diagnostic pop UIImage *rawImage = [UIImage imageWithData:[self dataWithBase64EncodedString:base64String]]; return [UIImage imageWithCGImage:rawImage.CGImage scale:screenScale orientation:UIImageOrientationUp]; } + (NSString *)CalloutArrow { return @"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"; } + (NSString *)CalloutArrow_2x { return @"iVBORw0KGgoAAAANSUhEUgAAAE4AAAAaCAYAAAAZtWr8AAAACXBIWXMAABYlAAAWJQFJUiTwAAAAHGlET1QAAAACAAAAAAAAAA0AAAAoAAAADQAAAA0AAAFMRh0LGwAAARhJREFUWAnclbENwjAQRZ0mih2fDYgsQEVDxQZMgKjpWYAJkBANI8AGDIEoM0WkzBDRAf8klB44g0OkU1zE3/+9RIpS7VVY730/y/woTWlsjJ9iPcN9pbXfY85auyvm/qcDNmb0e2Z+sk/ZBTthN0oVttX12mJIWeaWEFf+kbySmZQa0msu3nzaGJprTXV3BVLNDG/if7bNOTeAvFP35NGJu39GL7Abb27bFXncVQBZLgJf3jp+ebSWIxZMgrxdvPJoJ4gqHpXgV36ITR46HUGaiNMKB6YQd4lI3gV8qTBjmDhrbQFxVQTyKu4ShjJQap7nE4hrfiiv4Q6B8MLGat1bQNztB/JwZm8Rli5wujFu821xfGZgLPUAAAD//4wvm4gAAAD7SURBVOWXMQ6CMBiFgaFpi6VyBEedXJy4hMQTeBSvRDgJEySegI3EQWOivkZnqUB/k0LyL7R9L++D9G+DwP0TCZGUqCdRlYgUuY9F4JCmqQa0hgBcY7wIItFZMLZYS5l0ruAZbXhs6BIROgmhcoB7OIAHTZUTRqG3wp9xmhqc0aRPQu8YAlwxIbwCEUL6GH9wfDcLXY2HpyvvmkHf9+BcrwCuHQGvNRp9Pl6OY0PPAO42AB7WqMxLKLahpFR7gLv/AA9zPe+gtvAMCIC7WMC7CqEPtrqzmBfHyy3A1V/g1Th27GYBY0BIxrk6Ap65254/VZp30GID9JwteQEZrVMWXqGn8gAAAABJRU5ErkJggg=="; } @end // // Our UIView frame helpers implementation // @implementation UIView (SMFrameAdditions) - (CGPoint)frameOrigin { return self.frame.origin; } - (void)setFrameOrigin:(CGPoint)origin { self.frame = (CGRect){ .origin=origin, .size=self.frame.size }; } - (CGFloat)frameX { return self.frame.origin.x; } - (void)setFrameX:(CGFloat)x { self.frame = (CGRect){ .origin.x=x, .origin.y=self.frame.origin.y, .size=self.frame.size }; } - (CGFloat)frameY { return self.frame.origin.y; } - (void)setFrameY:(CGFloat)y { self.frame = (CGRect){ .origin.x=self.frame.origin.x, .origin.y=y, .size=self.frame.size }; } - (CGSize)frameSize { return self.frame.size; } - (void)setFrameSize:(CGSize)size { self.frame = (CGRect){ .origin=self.frame.origin, .size=size }; } - (CGFloat)frameWidth { return self.frame.size.width; } - (void)setFrameWidth:(CGFloat)width { self.frame = (CGRect){ .origin=self.frame.origin, .size.width=width, .size.height=self.frame.size.height }; } - (CGFloat)frameHeight { return self.frame.size.height; } - (void)setFrameHeight:(CGFloat)height { self.frame = (CGRect){ .origin=self.frame.origin, .size.width=self.frame.size.width, .size.height=height }; } - (CGFloat)frameLeft { return self.frame.origin.x; } - (void)setFrameLeft:(CGFloat)left { self.frame = (CGRect){ .origin.x=left, .origin.y=self.frame.origin.y, .size.width=fmaxf(self.frame.origin.x+self.frame.size.width-left,0), .size.height=self.frame.size.height }; } - (CGFloat)frameTop { return self.frame.origin.y; } - (void)setFrameTop:(CGFloat)top { self.frame = (CGRect){ .origin.x=self.frame.origin.x, .origin.y=top, .size.width=self.frame.size.width, .size.height=fmaxf(self.frame.origin.y+self.frame.size.height-top,0) }; } - (CGFloat)frameRight { return self.frame.origin.x + self.frame.size.width; } - (void)setFrameRight:(CGFloat)right { self.frame = (CGRect){ .origin=self.frame.origin, .size.width=fmaxf(right-self.frame.origin.x,0), .size.height=self.frame.size.height }; } - (CGFloat)frameBottom { return self.frame.origin.y + self.frame.size.height; } - (void)setFrameBottom:(CGFloat)bottom { self.frame = (CGRect){ .origin=self.frame.origin, .size.width=self.frame.size.width, .size.height=fmaxf(bottom-self.frame.origin.y,0) }; } @end