优秀工程师之—UISegmentedControl

UISegmentedControl类似于UIButton,它可以提供多个选择操作,响应事件,但是有很大的局限性,我们更多的是使用自定义的,先介绍下它的基本用法：

直接上代码：

1. //初始化segmentedArray中要显示的标题
2. NSArray *segmentedArray = [[NSArrayalloc]initWithObjects:@"1",@"2",@"3",@"4",nil];   
3. //初始化UISegmentedControl，并且添加标题   
4. UISegmentedControl *segmentedControl = [[UISegmentedControlalloc]initWithItems:segmentedArray];   
5. segmentedControl.frame = CGRectMake(20.0,……)  
6. // 设置默认选择项索引   
7. segmentedControl.selectedSegmentIndex = 2;  
8. segmentedControl.tintColor = [UIColor redColor];   
9. // segmentedControl基本样式  
10. segmentedControl.segmentedControlStyle = UISegmentedControlStylePlain;  
11. segmentedControl.segmentedControlStyle = UISegmentedControlStyleBordered;  
12. segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;  
13. segmentedControl.segmentedControlStyle = UISegmentedControlStyleBezeled;  
14.   
15.   
16. // 设置在点击后是否恢复原样      
17.  segmentedControl.momentary = YES;  
18.  [segmentedControl setTitle:@"two" forSegmentAtIndex:1];//设置指定索引的题目   
19.  [segmentedControl setImage:[UIImage imageNamed:@"btn_jyy.png"] forSegmentAtIndex:3];//设置指定索引的图片   
20. // 在指定索引插入一个选项并设置图片  
21.  [segmentedControl insertSegmentWithImage:[UIImage imageNamed:@"mei.png"] atIndex:2 animated:NO];  
22. // 在指定索引插入一个选项并设置题目   
23.  [segmentedControl insertSegmentWithTitle:@"insert" atIndex:3 animated:NO];  
24.   
25. // 移除指定索引的选项   
26.  [segmentedControl removeSegmentAtIndex:0 animated:NO];  
27. // 设置指定索引选项的宽度   
28.  [segmentedControl setWidth:70.0 forSegmentAtIndex:2];  
29. // 设置选项中图片等的左上角的位置   
30.  [segmentedControl setContentOffset:CGSizeMake(10.0,10.0) forSegmentAtIndex:4];  
31.   
32.  //获取指定索引选项的图片imageForSegmentAtIndex：   
33.  UIImageView *imageForSegmentAtIndex = [[UIImageViewalloc]initWithImage:[segmentedControl imageForSegmentAtIndex:1]];   
34.  imageForSegmentAtIndex.frame = CGRectMake(60.0, 120.0, 30.0, 30.0);  ;  
35.   
36.  //获取指定索引选项的标题titleForSegmentAtIndex   
37.  UILabel *titleForSegmentAtIndex = [[UILabel alloc]initWithFrame:CGRectMake(100.0, 160.0, 30.0, 30.0)];   
38.  titleForSegmentAtIndex.text = [segmentedControl titleForSegmentAtIndex:0];   
39.   
40.  //获取总选项数segmentedControl.numberOfSegments   
41.  UILabel *numberOfSegments = [[UILabel alloc]initWithFrame:CGRectMake(140.0, 170.0, 30.0, 30.0)];   
42.  numberOfSegments.text = [NSString stringWithFormat:@"%d",segmentedControl.numberOfSegments];  
43.   
44.  //获取指定索引选项的宽度widthForSegmentAtIndex：   
45.  UILabel *widthForSegmentAtIndex = [[UILabel alloc]initWithFrame:CGRectMake(180.0, 210.0, 70.0, 30.0)];   
46.  widthForSegmentAtIndex.text = [NSString stringWithFormat:@"%f",[segmentedControl widthForSegmentAtIndex:2]];   
47.    
48. // [segmentedControl setEnabled:NO forSegmentAtIndex:4];//设置指定索引选项不可选   
49. // BOOL enableFlag = [segmentedControl isEnabledForSegmentAtIndex:4];//判断指定索引选项是否可选   
50.    [mySegmentedControladdTarget:selfaction:@selector(didClicksegmentedControlAction:)forControlEvents:UIControlEventValueChanged];    
51.   
52. oid)didClicksegmentedControlAction:(UISegmentedControl *)Seg{  
53.  NSInteger Index = Seg.selectedSegmentIndex;  
54.  NSLog(@"Index %i", Index);  
55.  switch (Index) {  
56.      case 0:  
57.          [self selectmyView1];  
58.          break;  
59.      case 1:  
60.          [self selectmyView2];  
61.          break;  
62.      case 2:  
63.          [self selectmyView3];  
64.          break;  
65.      case 3:  
66.          [self selectmyView4];  
67.          break;  
68. …………………………….  
69.      default:  
70.          break;  
71.  }