UISegmentedControl的基本用法

               @UISegmentedControl類似於UIButton,它可以提供多個選擇操作,響應事件,但具有很大的侷限性,我們更多的是使用自定義的,不過在這裏還是介紹下它的基本用法.

   NSArray *segmentedArray = [[NSArrayalloc]initWithObjects:@"1",@"2",@"3",@"4",nil]; 
   //初始化UISegmentedControl 
   UISegmentedControl *segmentedControl = [[UISegmentedControlalloc]initWithItems:segmentedArray]; 
   segmentedControl.frame = CGRectMake(20.0,……)
   // 設置默認選擇項索引 
   segmentedControl.selectedSegmentIndex = 2;
   segmentedControl.tintColor = [UIColor redColor]; 
   // 有基本四種樣式
   segmentedControl.segmentedControlStyle = UISegmentedControlStylePlain;
   segmentedControl.segmentedControlStyle = UISegmentedControlStyleBordered;
   segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;
   segmentedControl.segmentedControlStyle = UISegmentedControlStyleBezeled;


   // 設置在點擊後是否恢復原樣    
    segmentedControl.momentary = YES;
    [segmentedControl setTitle:@"two" forSegmentAtIndex:1];//設置指定索引的題目 
    [segmentedControl setImage:[UIImage imageNamed:@"btn_jyy.png"] forSegmentAtIndex:3];//設置指定索引的圖片 
   // 在指定索引插入一個選項並設置圖片
    [segmentedControl insertSegmentWithImage:[UIImage imageNamed:@"mei.png"] atIndex:2 animated:NO];
   // 在指定索引插入一個選項並設置題目 
    [segmentedControl insertSegmentWithTitle:@"insert" atIndex:3 animated:NO];

   // 移除指定索引的選項 
    [segmentedControl removeSegmentAtIndex:0 animated:NO];
   // 設置指定索引選項的寬度 
    [segmentedControl setWidth:70.0 forSegmentAtIndex:2];
   // 設置選項中圖片等的左上角的位置 
    [segmentedControl setContentOffset:CGSizeMake(10.0,10.0) forSegmentAtIndex:4];
   
    //獲取指定索引選項的圖片imageForSegmentAtIndex： 
    UIImageView *imageForSegmentAtIndex = [[UIImageViewalloc]initWithImage:[segmentedControl imageForSegmentAtIndex:1]]; 
    imageForSegmentAtIndex.frame = CGRectMake(60.0, 120.0, 30.0, 30.0);  ;
   
    //獲取指定索引選項的標題titleForSegmentAtIndex 
    UILabel *titleForSegmentAtIndex = [[UILabel alloc]initWithFrame:CGRectMake(100.0, 160.0, 30.0, 30.0)]; 
    titleForSegmentAtIndex.text = [segmentedControl titleForSegmentAtIndex:0]; 
   
    //獲取總選項數segmentedControl.numberOfSegments 
    UILabel *numberOfSegments = [[UILabel alloc]initWithFrame:CGRectMake(140.0, 170.0, 30.0, 30.0)]; 
    numberOfSegments.text = [NSString stringWithFormat:@"%d",segmentedControl.numberOfSegments];
 
    //獲取指定索引選項的寬度widthForSegmentAtIndex： 
    UILabel *widthForSegmentAtIndex = [[UILabel alloc]initWithFrame:CGRectMake(180.0, 210.0, 70.0, 30.0)]; 
    widthForSegmentAtIndex.text = [NSString stringWithFormat:@"%f",[segmentedControl widthForSegmentAtIndex:2]]; 
    
   // [segmentedControl setEnabled:NO forSegmentAtIndex:4];//設置指定索引選項不可選 
   // BOOL enableFlag = [segmentedControl isEnabledForSegmentAtIndex:4];//判斷指定索引選項是否可選 
      [mySegmentedControladdTarget:selfaction:@selector(didClicksegmentedControlAction:)forControlEvents:UIControlEventValueChanged];  

-(void)didClicksegmentedControlAction:(UISegmentedControl *)Seg{
    NSInteger Index = Seg.selectedSegmentIndex;
    NSLog(@"Index %i", Index);
    switch (Index) {
        case 0:
            [self selectmyView1];
            break;
        case 1:
            [self selectmyView2];
            break;
        case 2:
            [self selectmyView3];
            break;
        case 3:
            [self selectmyView4];
            break;
…………………………………….
        default:
            break;
    }
}