- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // 1 UIStoryboard *mainStoryboard = nil; if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"6.0")) { mainStoryboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil]; } else { mainStoryboard = [UIStoryboard storyboardWithName:@"MainStoryboard-legacy" bundle:nil]; } // 2 self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; self.window.rootViewController = [mainStoryboard instantiateInitialViewController]; [self.window makeKeyAndVisible]; return YES; }
storyboard兼容版本处理
//storyboard版本兼容
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