feat: adding isiOSBeta then launch TestFlight

Author: etiennetheodore@orange.fr

README.md

@@ -13,6 +13,7 @@ For iOS 9 and above, your `Info.plist` file  __MUST__ have the following:
 ```
 <key>LSApplicationQueriesSchemes</key>
 <array>
+        <string>itms-beta</string>
         <string>itms</string>
 </array>
 ```

example/ios/Flutter/Debug.xcconfig

@@ -1 +1,2 @@
+#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
 #include "Generated.xcconfig"

example/ios/Flutter/Release.xcconfig

@@ -1 +1,2 @@
+#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
 #include "Generated.xcconfig"

ios/Classes/LaunchReviewPlugin.m

@@ -28,6 +28,23 @@ - (void)handleMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result {
             } else {
               iTunesLink = [NSString stringWithFormat:@"itms-apps://itunes.apple.com/app/id%@", appId];
             }
+            
+            if ([call.arguments[@"is_ios_beta"] boolValue]) {
+              NSURL *customAppURL = [NSURL URLWithString:@"itms-beta://"];
+              if ([[UIApplication sharedApplication] canOpenURL:customAppURL]) {
+                  
+                  // TestFlight is installed
+                  
+                  // Special link that includes the app's Apple ID
+                  iTunesLink = [NSString stringWithFormat:@"itms-beta://beta.itunes.apple.com/v1/app/id%@", appId];
+                  NSURL* itunesURL = [NSURL URLWithString:iTunesLink];
+
+                  if ([[UIApplication sharedApplication] canOpenURL:itunesURL]) {
+                    [[UIApplication sharedApplication] openURL:itunesURL];
+                  }
+                  result(nil);
+              }
+            }
 
             NSURL* itunesURL = [NSURL URLWithString:iTunesLink];
             if ([[UIApplication sharedApplication] canOpenURL:itunesURL]) {

lib/launch_review.dart

@@ -6,8 +6,16 @@ class LaunchReview {
   /// Note: It will not work with the iOS Simulator.
   ///
   /// Set writeReview to false to only show the app store page. Used only in iOS.
-  static void launch({String androidAppId, String iOSAppId, bool writeReview = true}) async {
-    await _channel.invokeMethod(
-        'launch', {'android_id': androidAppId, 'ios_id': iOSAppId, 'write_review': writeReview});
+  static void launch(
+      {String androidAppId,
+      String iOSAppId,
+      bool writeReview = true,
+      bool isiOSBeta = false}) async {
+    await _channel.invokeMethod('launch', {
+      'android_id': androidAppId,
+      'ios_id': iOSAppId,
+      'write_review': writeReview,
+      'is_ios_beta': isiOSBeta
+    });
   }
 }