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];

如果应用运行背景，我怎么能显示警告？

Answer 1

当您的应用在后台时使用UILocalNotification。

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