在iphone sdk 4.3中单击按钮的警报消息

发布时间：2020-12-14 19:58:22 所属栏目：百科来源：网络整理

导读：我是 xcode编程的初学者.当我们要点击xcode- iphone-4.3中的按钮时,请告诉我如何显示警告信息我的守则如下, - (IBAction)buttonPressed:(id)sender{ UIAlertView* mes=[[UIAlertView alloc] initWithTitle:@"Hello World!!!!!!" message:@"This is the Ipho

我是 xcode编程的初学者.当我们要点击xcode- iphone-4.3中的按钮时,请告诉我如何显示警告信息

我的守则如下,

- (IBAction)buttonPressed:(id)sender{

    UIAlertView* mes=[[UIAlertView alloc] initWithTitle:@"Hello World!!!!!!" 
                                                    message:@"This is the Iphone app" delegate:self cancelButtonTitle:@"Ok" otherButtonTitles: nil];

    [mes show];

    [mes release];

请帮我解决这个问题.

解决方法

-(IBAction)buttonOnePressed:(id)sender
 {
     UIAlertView *alert = [[UIAlertView alloc]initWithTitle: @"Clicked button 1"
                  message: @"Alert Message here"
                  delegate: self
                  cancelButtonTitle:@"Cancel"
                  otherButtonTitles:@"OK",nil];

     [alert setTag:1];
     [alert show];
 }

-(IBAction)buttonTwoPressed:(id)sender
 {
     UIAlertView *alert = [[UIAlertView alloc]initWithTitle: @"Clicked button 2"
                  message: @"Alert Message here"
                  delegate: self
                  cancelButtonTitle:@"Cancel"
                  otherButtonTitles:@"OK",nil];

     [alert setTag:2];
     [alert show];
 }

下面是跟踪Alertview上的哪个按钮的委托方法.

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex   
   {
     if (alertView.tag == 1) { // UIAlertView with tag 1 detected
       if (buttonIndex == 0) 
       {
            NSLog(@"user pressed Button Indexed 0");
            // Any action can be performed here
       }
       else 
       {
            NSLog(@"user pressed Button Indexed 1");
            // Any action can be performed here
       }
     }

    else if (alertView.tag == 2) { // UIAlertView with tag 2 detected
       if (buttonIndex == 0) 
       {
            NSLog(@"user pressed Button Indexed 0");
            // Any action can be performed here
       }
       else 
       {
            NSLog(@"user pressed Button Indexed 1");
            // Any action can be performed here
       }
     }
   }

如果您有多个UIAlertViews,可以将标记设置为UIAlertView,并且可以使用其各自的标记确定在其委托方法clickedButtonAtIndex中单击了哪个UIAlertView按钮.

（编辑：李大同）

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