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);
- }