[ios] remove CoreTelephony dependency

Cellular carrier name and connectivity level will now only be sent if
the developer independently chooses to link the CoreTelephony framework
in their app.

6 files changed, 37 insertions, 41 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index dbc795ada0..e16d11f182 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@
 - Fixed a rendering issue with styles that use the `background-pattern` property. ([#2531](https://github.com/mapbox/mapbox-gl-native/pull/2531))
 - Labels can now line wrap on hyphens and other punctuation. ([#2598](https://github.com/mapbox/mapbox-gl-native/pull/2598))
 - A new delegate callback was added for observing taps to annotation callout views. ([#2596](https://github.com/mapbox/mapbox-gl-native/pull/2596))
+- Removed CoreTelephony.framework dependency. ([#2581](https://github.com/mapbox/mapbox-gl-native/pull/2581))
 
 ## iOS 2.1.2
 
diff --git a/INSTALL.md b/INSTALL.md
index cb72c55a98..17ad27665e 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -150,7 +150,6 @@ Currently, until [#1437](https://github.com/mapbox/mapbox-gl-native/issues/1437)
 
 1. Add the following Cocoa framework dependencies to your target's *Link Binary With Libraries* build phase:
 
-   - `CoreTelephony.framework`
    - `GLKit.framework`
    - `ImageIO.framework`
    - `MobileCoreServices.framework`
@@ -159,6 +158,7 @@ Currently, until [#1437](https://github.com/mapbox/mapbox-gl-native/issues/1437)
    - `libc++.dylib`
    - `libsqlite3.dylib`
    - `libz.dylib`
+   - `CoreTelephony.framework` (optional, telemetry-only)
 
 1. Add `-ObjC` to your target's "Other Linker Flags" build setting (`OTHER_LDFLAGS`).
 
@@ -168,6 +168,10 @@ Devices: iPhone 4S and above (5, 5c, 5s, 6, 6 Plus), iPad 2 and above (3, 4, Min
 
 iOS: 7.0+
 
+### Telemetry
+
+The iOS SDK collects [telemetry data](https://www.mapbox.com/telemetry/) during use and [requires additional setup](https://www.mapbox.com/ios-sdk/#metrics_opt_out).
+
 
 ## Linux
 
diff --git a/gyp/platform-ios.gypi b/gyp/platform-ios.gypi
index 87c4e684c6..87cecb5e77 100644
--- a/gyp/platform-ios.gypi
+++ b/gyp/platform-ios.gypi
@@ -75,7 +75,6 @@
         ],
         'ldflags': [
           '-framework CoreLocation',
-          '-framework CoreTelephony',
           '-framework GLKit',
           '-framework ImageIO',
           '-framework MobileCoreServices',
diff --git a/ios/Mapbox-iOS-SDK.podspec b/ios/Mapbox-iOS-SDK.podspec
index c9d84a1681..c70bf8ff57 100644
--- a/ios/Mapbox-iOS-SDK.podspec
+++ b/ios/Mapbox-iOS-SDK.podspec
@@ -28,7 +28,7 @@ Pod::Spec.new do |m|
   m.vendored_library = 'libMapbox.a'
   m.module_name = 'Mapbox'
 
-  m.frameworks = 'CoreLocation', 'CoreTelephony', 'GLKit', 'ImageIO', 'MobileCoreServices', 'QuartzCore', 'SystemConfiguration'
+  m.frameworks = 'CoreLocation', 'GLKit', 'ImageIO', 'MobileCoreServices', 'QuartzCore', 'SystemConfiguration'
   m.libraries = 'c++', 'sqlite3', 'z'
   m.xcconfig = {
     'OTHER_CPLUSPLUSFLAGS' => '-std=gnu++11 -stdlib=libc++',
diff --git a/platform/ios/MGLMapboxEvents.m b/platform/ios/MGLMapboxEvents.m
index 1bddb7ff40..bc6dfb02b7 100644
--- a/platform/ios/MGLMapboxEvents.m
+++ b/platform/ios/MGLMapboxEvents.m
@@ -1,8 +1,6 @@
 #import "MGLMapboxEvents.h"
 
 #import <UIKit/UIKit.h>
-#import <CoreTelephony/CTTelephonyNetworkInfo.h>
-#import <CoreTelephony/CTCarrier.h>
 #import <CoreLocation/CoreLocation.h>
 
 #include <mbgl/platform/darwin/reachability.h>
@@ -77,8 +75,19 @@ const NSTimeInterval MGLFlushInterval = 60;
         } else {
             _scale = [UIScreen mainScreen].scale;
         }
-        CTCarrier *carrierVendor = [[[CTTelephonyNetworkInfo alloc] init] subscriberCellularProvider];
-        _carrier = [carrierVendor carrierName];
+
+        // Collect cellular carrier data if CoreTelephony is linked
+        Class CTTelephonyNetworkInfo = NSClassFromString(@"CTTelephonyNetworkInfo");
+        if (CTTelephonyNetworkInfo) {
+            id telephonyNetworkInfo = [[CTTelephonyNetworkInfo alloc] init];
+
+            SEL subscriberCellularProviderSelector = NSSelectorFromString(@"subscriberCellularProvider");
+            id carrierVendor = ((id (*)(id, SEL))[telephonyNetworkInfo methodForSelector:subscriberCellularProviderSelector])(telephonyNetworkInfo, subscriberCellularProviderSelector);
+
+            SEL carrierNameSelector = NSSelectorFromString(@"carrierName");
+            NSString *carrierName = ((id (*)(id, SEL))[carrierVendor methodForSelector:carrierNameSelector])(carrierVendor, carrierNameSelector);
+            _carrier = carrierName;
+        }
     }
     return self;
 }
@@ -497,14 +506,13 @@ const NSTimeInterval MGLFlushInterval = 60;
         [evt setValue:@((int)(100 * [UIDevice currentDevice].batteryLevel)) forKey:@"batteryLevel"];
         [evt setValue:@(strongSelf.data.scale) forKey:@"resolution"];
         [evt setValue:strongSelf.data.carrier forKey:@"carrier"];
-        
-        NSString *cell = [strongSelf currentCellularNetworkConnectionType];
-        if (cell) {
-            [evt setValue:cell forKey:@"cellularNetworkType"];
-        } else {
-            [evt setObject:[NSNull null] forKey:@"cellularNetworkType"];
+
+        NSString *cell;
+        if (strongSelf.data.carrier) {
+            cell = [strongSelf currentCellularNetworkConnectionType];
         }
-        
+        [evt setObject:(cell ? cell : [NSNull null]) forKey:@"cellularNetworkType"];
+
         MGLReachability *reachability = [MGLReachability reachabilityForLocalWiFi];
         [evt setValue:([reachability isReachableViaWiFi] ? @YES : @NO) forKey:@"wifi"];
         
@@ -716,33 +724,19 @@ const NSTimeInterval MGLFlushInterval = 60;
 // Can be called from any thread.
 //
 - (NSString *) currentCellularNetworkConnectionType {
-    CTTelephonyNetworkInfo *telephonyInfo = [[CTTelephonyNetworkInfo alloc] init];
-    NSString *radioTech = telephonyInfo.currentRadioAccessTechnology;
-    
+    NSString *radioTech;
+
+    Class CTTelephonyNetworkInfo = NSClassFromString(@"CTTelephonyNetworkInfo");
+    if (CTTelephonyNetworkInfo) {
+        id telephonyNetworkInfo = [[CTTelephonyNetworkInfo alloc] init];
+        SEL currentRadioAccessTechnologySelector = NSSelectorFromString(@"currentRadioAccessTechnology");
+        radioTech = ((id (*)(id, SEL))[telephonyNetworkInfo methodForSelector:currentRadioAccessTechnologySelector])(telephonyNetworkInfo, currentRadioAccessTechnologySelector);
+    }
+
     if (radioTech == nil) {
         return nil;
-    } else if ([radioTech isEqualToString:CTRadioAccessTechnologyGPRS]) {
-        return @"GPRS";
-    } else if ([radioTech isEqualToString:CTRadioAccessTechnologyEdge]) {
-        return @"EDGE";
-    } else if ([radioTech isEqualToString:CTRadioAccessTechnologyWCDMA]) {
-        return @"WCDMA";
-    } else if ([radioTech isEqualToString:CTRadioAccessTechnologyHSDPA]) {
-        return @"HSDPA";
-    } else if ([radioTech isEqualToString:CTRadioAccessTechnologyHSUPA]) {
-        return @"HSUPA";
-    } else if ([radioTech isEqualToString:CTRadioAccessTechnologyCDMA1x]) {
-        return @"CDMA1x";
-    } else if ([radioTech isEqualToString:CTRadioAccessTechnologyCDMAEVDORev0]) {
-        return @"CDMAEVDORev0";
-    } else if ([radioTech isEqualToString:CTRadioAccessTechnologyCDMAEVDORevA]) {
-        return @"CDMAEVDORevA";
-    } else if ([radioTech isEqualToString:CTRadioAccessTechnologyCDMAEVDORevB]) {
-        return @"CDMAEVDORevB";
-    } else if ([radioTech isEqualToString:CTRadioAccessTechnologyeHRPD]) {
-        return @"HRPD";
-    } else if ([radioTech isEqualToString:CTRadioAccessTechnologyLTE]) {
-        return @"LTE";
+    } else if ([radioTech hasPrefix:@"CTRadioAccessTechnology"]) {
+        return [radioTech substringFromIndex:23];
     } else {
         return @"Unknown";
     }
diff --git a/test/ios/ios-tests.xcodeproj/project.pbxproj b/test/ios/ios-tests.xcodeproj/project.pbxproj
index fed45bf7ed..c5f2264dd9 100644
--- a/test/ios/ios-tests.xcodeproj/project.pbxproj
+++ b/test/ios/ios-tests.xcodeproj/project.pbxproj
@@ -25,7 +25,6 @@
 		DD0E6F9B1B01B68E00DC035A /* OHHTTPStubsResponse+HTTPMessage.m in Sources */ = {isa = PBXBuildFile; fileRef = DD0E6F931B01B68E00DC035A /* OHHTTPStubsResponse+HTTPMessage.m */; };
 		DD0E6F9C1B01B68E00DC035A /* OHHTTPStubsResponse+JSON.m in Sources */ = {isa = PBXBuildFile; fileRef = DD0E6F951B01B68E00DC035A /* OHHTTPStubsResponse+JSON.m */; };
 		DD0E6F9D1B01B68E00DC035A /* OHPathHelpers.m in Sources */ = {isa = PBXBuildFile; fileRef = DD0E6F971B01B68E00DC035A /* OHPathHelpers.m */; };
-		DD41CE091ACB5DBC00FA7979 /* CoreTelephony.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = DD41CE081ACB5DBC00FA7979 /* CoreTelephony.framework */; };
 		DD41CE0B1ACB5DC400FA7979 /* SystemConfiguration.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = DD41CE0A1ACB5DC400FA7979 /* SystemConfiguration.framework */; };
 		DD41CE0D1ACB5DCB00FA7979 /* libc++.dylib in Frameworks */ = {isa = PBXBuildFile; fileRef = DD41CE0C1ACB5DCB00FA7979 /* libc++.dylib */; };
 		DD41CE0F1ACB5DD000FA7979 /* libsqlite3.dylib in Frameworks */ = {isa = PBXBuildFile; fileRef = DD41CE0E1ACB5DD000FA7979 /* libsqlite3.dylib */; };
@@ -145,7 +144,6 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				DD41CE091ACB5DBC00FA7979 /* CoreTelephony.framework in Frameworks */,
 				DD41CE171ACB5DE700FA7979 /* GLKit.framework in Frameworks */,
 				DD41CE151ACB5DE000FA7979 /* ImageIO.framework in Frameworks */,
 				DD41CE131ACB5DDA00FA7979 /* MobileCoreServices.framework in Frameworks */,