相关疑难解决方法(0)

在我的项目中实现它之前,我已经用计时器创建了一个测试应用程序.这是我第一次使用计时器.但问题是当我实现计时器使用时[NSTimer timerWithTimeInterval: target: selector: userInfo: repeats: ];,它无法正常工作.这是我的代码,界面:

@interface uialertViewController : UIViewController
{

    NSTimer *timer;
}

-(void)displayAlert;
-(void)hideandview;
@end

执行:

@implementation uialertViewController
- (void)viewDidLoad {

    [self displayAlert];
    [super viewDidLoad];
}


-(void)displayAlert{

    timer = [NSTimer timerWithTimeInterval:1 target:self selector:@selector(hideandview) userInfo:nil repeats:NO];

    alert = [[UIAlertView alloc] initWithTitle:@"testing" message:@"hi hi hi" delegate:nil cancelButtonTitle:@"continue" otherButtonTitles:nil];
    [alert show];




    [alert release];
    alert = nil;

}

-(void)hideandview{

    NSLog(@"triggered");

    [alert dismissWithClickedButtonIndex:0 animated:YES];

    [alert release];

    [self displayAlert];
}

@end

然后我换 [NSTimer timerWithTimeInterval: target: selector: userInfo: repeats: ]; 了 [NSTimer …