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| author | m-stephen <truestyle2005@163.com> | 2019-03-06 12:02:31 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2019-03-06 12:02:31 +0800 |
| commit | 383fde6804b0865dce6aaf22394509722845c33f (patch) | |
| tree | b867449a2c90c8b42c99137ff3c967de1c2e9bc3 | |
| parent | 113179cddd76cf5ed325262b094fc3ea6bd2c201 (diff) | |
| download | qtlocation-mapboxgl-383fde6804b0865dce6aaf22394509722845c33f.tar.gz | |
Add option to prefetch low-resolution tiles (#14031)
* Add option to prefetch low-resolution tiles
| -rw-r--r-- | platform/ios/CHANGELOG.md | 1 | ||||
| -rw-r--r-- | platform/ios/src/MGLMapView.h | 12 | ||||
| -rw-r--r-- | platform/ios/src/MGLMapView.mm | 8 |
3 files changed, 21 insertions, 0 deletions
diff --git a/platform/ios/CHANGELOG.md b/platform/ios/CHANGELOG.md index 9b883b34c0..98bc6543c9 100644 --- a/platform/ios/CHANGELOG.md +++ b/platform/ios/CHANGELOG.md @@ -5,6 +5,7 @@ Mapbox welcomes participation and contributions from everyone. Please read [CONT ## master * Client-side text rendering of CJK ideographs is now enabled by default. ([#13988](https://github.com/mapbox/mapbox-gl-native/pull/13988)) +* Added an MGLMapView.prefetchesTiles property that you can disable if you don’t want to prefetch simplified tiles as a performance optimization. ([#14031](https://github.com/mapbox/mapbox-gl-native/pull/14031)) ## 4.9.0 - February 27, 2019 diff --git a/platform/ios/src/MGLMapView.h b/platform/ios/src/MGLMapView.h index 5930dc98c1..eae48adf0a 100644 --- a/platform/ios/src/MGLMapView.h +++ b/platform/ios/src/MGLMapView.h @@ -352,6 +352,18 @@ MGL_EXPORT IB_DESIGNABLE */ @property (nonatomic, assign) MGLMapViewPreferredFramesPerSecond preferredFramesPerSecond; +/** + A Boolean value indicating whether the map should prefetch tiles. + + When this property is set to YES, the map view prefetches loads tiles designed for a + low zoom level and displays them until receiving more detailed tiles for the current + zoom level. The prefetched tiles typically contain simplified versions of each shape, + improving the map view’s perceived performance. + + The default value of this property is YES. + */ +@property (nonatomic, assign) BOOL prefetchesTiles; + @property (nonatomic) NSArray<NSString *> *styleClasses __attribute__((unavailable("Support for style classes has been removed."))); - (BOOL)hasStyleClass:(NSString *)styleClass __attribute__((unavailable("Support for style classes has been removed."))); diff --git a/platform/ios/src/MGLMapView.mm b/platform/ios/src/MGLMapView.mm index 3eeffb9cbd..0c6632f229 100644 --- a/platform/ios/src/MGLMapView.mm +++ b/platform/ios/src/MGLMapView.mm @@ -2630,6 +2630,14 @@ public: } } +- (void)setPrefetchesTiles:(BOOL)prefetchesTiles{ + _mbglMap->setPrefetchZoomDelta(prefetchesTiles ? mbgl::util::DEFAULT_PREFETCH_ZOOM_DELTA : 0); +} + +- (BOOL)prefetchesTiles{ + return _mbglMap->getPrefetchZoomDelta() > 0 ? YES : NO; +} + #pragma mark - Accessibility - - (NSString *)accessibilityValue |