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]; 

如何在应用程序运行后台时显示警报？

Answer 1

当你的应用程序在后台时使用UILocalNotification。

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