一，效果图。

二，代码。

- (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. UIAlertView* alert = [[UIAlertView alloc]initWithTitle:nil message:@"此信息３秒后消失" delegate:nil cancelButtonTitle:nil otherButtonTitles:nil, nil]; [alert show]; [self performSelector:@selector(dismissAlert:) withObject:alert afterDelay:3.0];}- (void)dismissAlert:(UIAlertView*)alert { if ( alert.visible ) { [alert dismissWithClickedButtonIndex:alert.cancelButtonIndex animated:YES]; }}

下面给大家介绍下UIAlertView自动消失的两种方法

话说，在写程序的过程中用到很多提示的信息，于是非常自然地就要使用UIAlertView控件。

但是这些提示的信息有时候只需提示就行，不用操作，那么此时就要这个提示框自动消失就OK了。

UIAlertView弹出后2s让其自动消失，两种方法：

(1)结合NSTimer

UIAlertView baseAlert = nil;- (void) performDismiss: (NSTimer *)timer{ [baseAlert dismissWithClickedButtonIndex:0 animated:NO];//important [baseAlert release]; baseAlert = NULL;} - (void) presentSheet{ baseAlert = [[UIAlertView alloc] initWithTitle:@"Alert" message:@"\nMessage Message Message " delegate:self cancelButtonTitle:nil otherButtonTitles: nil]; [NSTimer scheduledTimerWithTimeInterval:2.0f target:self selector: @selector(performDismiss:) userInfo:nil repeats:NO]; [baseAlert show];}

(2)使用PerformSelector：withObject：afterDelay：方法

- (void) dimissAlert:(UIAlertView *)alert{ if(alert) { [alert dismissWithClickedButtonIndex:[alert cancelButtonIndex] animated:YES]; [alert release]; }}- (void)showAlert{ UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"title" message:@"message" delegate:nil cancelButtonTitle:nil otherButtonTitles:nil]; [alert show]; [self performSelector:@selector(dimissAlert:) withObject:alert afterDelay:2.0];}

总结

以上所述是小编给大家介绍的iOS中UIAlertView3秒后消失的两种实现方法，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！