當應用程序在後臺運行時顯示UIAlert？

Question

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

[alertView show]; 

如何在應用程序運行後臺時顯示警報？

Answer 1

當你的應用程序在後臺時使用UILocalNotification。

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