【代码笔记】iOS-UIAlertView自动关闭

来源：互联网发布：ubuntu 16.04 uuid 编辑：程序博客网时间：2024/06/08 19:39

一，效果图。

二，代码。

RootViewController.h

#import <UIKit/UIKit.h>@interface RootViewController : UIViewController<UIAlertViewDelegate>@end

RootViewController.m

- (void)viewDidLoad{    [super viewDidLoad];    // Do any additional setup after loading the view.        //alert    UIAlertView *alert=[[UIAlertView alloc]initWithTitle:nil message:@"一个可以自动关闭的Alert窗口" delegate:self cancelButtonTitle:nil otherButtonTitles:nil, nil];    [alert show];        //显示框    UIActivityIndicatorView *indicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];    indicator.backgroundColor=[UIColor redColor];    indicator.center = CGPointMake(alert.bounds.size.width/2,  alert.bounds.size.height-40.0);    [indicator startAnimating];        [alert insertSubview:indicator atIndex:0];        //定时器    [NSTimer scheduledTimerWithTimeInterval:3.0f target:self selector:@selector(dismissAlert:) userInfo:[NSDictionary dictionaryWithObjectsAndKeys:alert, @"alert", @"testing ", @"key" ,nil]  repeats:NO];}//alert 自动消失-(void) dismissAlert:(NSTimer *)timer{        UIAlertView *alert = [[timer userInfo]  objectForKey:@"alert"];    [alert dismissWithClickedButtonIndex:0 animated:YES];    }

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