AppGroup.m in cocoapods-app_group-0.4.1

- old
+ new

@@ -1,7 +1,9 @@
 #import "AppGroup.h"
 
-static NSString * const kAppIdentifier = @"jp.mzp.app_group.example";
+#define STR(x) @#x
+#define STR2(x) STR(x)
+static NSString * const kAppIdentifier = STR2(APP_IDENTIFIER);
 
 @implementation AppGroup
 
 + (NSString *)appGroupID
 {