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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
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