【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

1. //事件监听的问题
2. CGRect btn2Frame = CGRectMake(100.0, 150.0, 60.0, 44.0);
3. //两种不同的方式创建
4. UIButton *btn2 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
5. btn2.frame =btn2Frame;
6. //设置Title
7. [btn2 setTitle:@”BTN2″ forState:UIControlStateNormal];
8. [btn2 setTag:10001];
9. //[btn2 setBackgroundImage:[UIImage imageNamed:@”pic.png”] forState:UIControlStateNormal];
10. [btn2 setBackgroundColor:[UIColor blueColor]];
11. [btn2 addTarget:self action:@selector(btnPressed:) forControlEvents:UIControlEventTouchUpInside];
12. [self.view addSubview:btn2];
13. //事件监听的问题
14. CGRect btn1Frame = CGRectMake(200.0, 150.0, 60.0, 44.0);
15. //两种不同的方式创建
16. UIButton *btn1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
17. btn1.frame =btn1Frame;
18. //设置Title
19. [btn1 setTitle:@”BTN1″ forState:UIControlStateNormal];
20. [btn1 setTag:10002];
21. //[btn2 setBackgroundImage:[UIImage imageNamed:@”pic.png”] forState:UIControlStateNormal];
22. [btn1 setBackgroundColor:[UIColor blueColor]];
23. [btn1 addTarget:self action:@selector(btnPressed:) forControlEvents:UIControlEventTouchUpInside];
24. [self.view addSubview:btn1];
25. CGRect workingFrame;
26. workingFrame.origin.x = 15;
27. workingFrame.origin.y = 400;
28. workingFrame.size.width = 140;
29. workingFrame.size.height = 40;
30. for(int i = 0; i < 6; i++)
31. {
32. //UIView *myView = [[UIView alloc] initWithFrame:workingFrame];
33. UIButton *myView =[[UIButton alloc] initWithFrame:workingFrame];
34. [myView setTag:i];//标记方块
35. [myView setBackgroundColor:[UIColor blueColor]];
36. // NSString tit = “Button”i;
37. //NSLog(@”this is Button %d”, i);
38. [myView setTitle:@”Button %d” forState:UIControlStateNormal];
39. workingFrame.origin.x = workingFrame.origin.x + workingFrame.size.width + 10;
40. [myView addTarget:self action:@selector(btnPressed:) forControlEvents:UIControlEventTouchUpInside];
41. [self.view addSubview:myView];
42. }

在方法中使用tag选择器定位元素：

1. -(void)btnPressed:(id)sender{
2. UIButton *thisBtn = (UIButton*)sender;
3. //thisBtn.hidden = YES;
4. //self.view viewWithTag:[00002];
5. UIButton *myButton = (UIButton *)[self.view viewWithTag:(10002)];
6. myButton.hidden = YES;
7. NSLog(@”this button tag is %d”,thisBtn.tag);
8. //NSLog(@”self.view subViews %@”,self.view.subviews);
9. //    UIButton* thisBtn = (UIButton *)sender;
10. //    [[[UIAlertView alloc] initWithTitle:@”Button” message:[NSString stringWithFormat: @”This is button:%@”,thisBtn] delegate:self cancelButtonTitle:@”Cancel” otherButtonTitles:@”OK”, nil] show];
11. //    NSLog(@”this tag is %d”,btn.tag);
12. }