UI控件（UISegmentedControl）

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    NSArray* segmentArray = [[NSArray alloc]initWithObjects:@"Title1", @"Title2", @"Title3",nil];

    //也可以通过insertSegmentWithtitile方法添加选项
    //也可以对某个选项选择添加图片
    UISegmentedControl* segmentedControl = [[UISegmentedControl alloc]initWithItems:segmentArray];
    segmentedControl.frame = CGRectMake(, , , );

    //设置选项卡的默认点击项，从索引0开始
    segmentedControl.selectedSegmentIndex = ;

    //分段选项卡的颜色，默认为蓝色
    segmentedControl.tintColor = [UIColor redColor];

    //设置选项卡在点击后是否会恢复原状
    segmentedControl.momentary = NO;

    //segmentedControlStyle 在IOS 7以后无效
    //segmentedControl.segmentedControlStyle = UISegmentedControlStyleBezeled;

    //添加选项卡选择事件
    [segmentedControl addTarget:self action:@selector(doSelected:) forControlEvents:UIControlEventValueChanged];

    [self.view addSubview:segmentedControl];

}

-(void)doSelected:(id)sender{
    UISegmentedControl* tmp = (UISegmentedControl*)sender;
    NSLog(@"%ld", tmp.selectedSegmentIndex);
}

@end