ios - 当应用程序在后台运行时显示 UIAlert？

Question

UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"open app" message:@" backgr..." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];

[alertView show];

当应用程序在后台运行时，如何显示警报？

Answer 1

使用 UILocalNotification当您的应用程序处于后台时。

UILocalNotification *notification = [[UILocalNotification alloc] init];
notification.alertBody = @"Your message";
notification.alertAction = @"Open app";
[[UIApplication sharedApplication] presentLocalNotificationNow:notification];