【iOS开发】IOS界面开发使用viewWithTag:(int)findTag方法获取界面元素

http://blog.csdn.net/lxp1021/article/details/43952551

今天在开发OS界面的时候，遇到通过界面UIview viewWithTag:(int)findTag选择器定位界面元素的问题，以下把在界面中给元素打Tag，以及通过选择器查找界面元素的代码贴出来，供以后使用：

界面元素打tag

//事件监听的问题
       CGRect btn2Frame = CGRectMake(100.0, 150.0, 60.0, 44.0);
       //两种不同的方式创建
       UIButton *btn2 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
       btn2.frame =btn2Frame;
       //设置Title
       [btn2 setTitle:@"BTN2" forState:UIControlStateNormal];
       [btn2 setTag:10001];
       //[btn2 setBackgroundImage:[UIImage imageNamed:@"pic.png"] forState:UIControlStateNormal];
       [btn2 setBackgroundColor:[UIColor blueColor]];
       [btn2 addTarget:self action:@selector(btnPressed:) forControlEvents:UIControlEventTouchUpInside];
       [self.view addSubview:btn2];

       //事件监听的问题
       CGRect btn1Frame = CGRectMake(200.0, 150.0, 60.0, 44.0);
       //两种不同的方式创建
       UIButton *btn1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
       btn1.frame =btn1Frame;
       //设置Title
       [btn1 setTitle:@"BTN1" forState:UIControlStateNormal];
       [btn1 setTag:10002];
       //[btn2 setBackgroundImage:[UIImage imageNamed:@"pic.png"] forState:UIControlStateNormal];
       [btn1 setBackgroundColor:[UIColor blueColor]];
       [btn1 addTarget:self action:@selector(btnPressed:) forControlEvents:UIControlEventTouchUpInside];
       [self.view addSubview:btn1];

   CGRect workingFrame;

   workingFrame.origin.x = 15;
   workingFrame.origin.y = 400;
   workingFrame.size.width = 140;
   workingFrame.size.height = 40;
   for(int i = 0; i < 6; i++)
   {
       //UIView *myView = [[UIView alloc] initWithFrame:workingFrame];
       UIButton *myView =[[UIButton alloc] initWithFrame:workingFrame];
       [myView setTag:i];//标记方块
       [myView setBackgroundColor:[UIColor blueColor]];
       // NSString tit = "Button"i;
       //NSLog(@"this is Button %d", i);
       [myView setTitle:@"Button %d" forState:UIControlStateNormal];
       workingFrame.origin.x = workingFrame.origin.x + workingFrame.size.width + 10;
       [myView addTarget:self action:@selector(btnPressed:) forControlEvents:UIControlEventTouchUpInside];
       [self.view addSubview:myView];
   }

在方法中使用tag选择器定位元素：

-(void)btnPressed:(id)sender{
    UIButton *thisBtn = (UIButton*)sender;
    //thisBtn.hidden = YES;
    //self.view viewWithTag:[00002];
     UIButton *myButton = (UIButton *)[self.view viewWithTag:(10002)];
    myButton.hidden = YES;
    NSLog(@"this button tag is %d",thisBtn.tag);
    //NSLog(@"self.view subViews %@",self.view.subviews);

//    UIButton* thisBtn = (UIButton *)sender;
//    [[[UIAlertView alloc] initWithTitle:@"Button" message:[NSString stringWithFormat: @"This is button:%@",thisBtn] delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK", nil] show];
//    NSLog(@"this tag is %d",btn.tag);
}