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];
}
以上所述是小编给大家介绍的iOS UIAlertView自动关闭，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！
