当我收到远程通知时,我试图从 App 委托方法更改为主视图,以便在主视图中执行转场到另一个视图,但我收到 NSInvalidArgumentException
didReceiveRemoteNotification 时 App Delegate 中的代码:
-(void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {
EmergencyMasterViewController* maincontroller = (EmergencyMasterViewController*)self.window.rootViewController;
[maincontroller alert];
}
MasterView 中的代码:
-(void)alert
{
[self performSegueWithIdentifier: @"Warning" sender: self];
}
我得到的错误是:[UINavigationController alert]: unrecognized selector