@interface ViewController (){    UISegmentedControl *_segment;}

@implementation ViewController- (void)viewDidLoad{    [super viewDidLoad]; /*    //Items是数组，按顺序添加到segment（分段）上    UISegmentedControl *segment = [[UISegmentedControl alloc] initWithItems:@[ [UIImage imageNamed:@"1.jpg"], @"电话",@"消息"]];    //默认选择的    segment.selectedSegmentIndex = 1;        segment.frame = CGRectMake(100.f, 100.f, 200.f, 30.f);        segment.tintColor = [UIColor orangeColor];        [self.view addSubview:segment];        */    _segment = [[UISegmentedControl alloc] initWithItems:@[@"河科大",@"清华",@"北大"]];        _segment.frame = CGRectMake(100.f, 100.f, 200.f, 30.f);    //这个atIndex中又容错性，用100也是加到第四个，自己设计的时候，如果加入的索引值大于数组元素个数，酒吧索引值设置为数组长度    [_segment insertSegmentWithImage:[UIImage imageNamed:@"1.jpg"] atIndex:1 animated:YES];        [_segment removeSegmentAtIndex:1 animated:YES];    //设置宽度        [_segment setWidth:33.f forSegmentAtIndex:1];    //设置不能点击    [_segment setEnabled:NO forSegmentAtIndex:1];        [self.view addSubview:_segment];            UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(10.f, 20.f, 30.f, 30.f)];        btn.backgroundColor = [UIColor orangeColor];    [self.view addSubview:btn];    [btn addTarget:self action:@selector(action) forControlEvents:UIControlEventTouchUpInside];    UIButton *delBtn = [[UIButton alloc] initWithFrame:CGRectMake(40.f, 20.f, 30.f, 30.f)];        delBtn.backgroundColor = [UIColor purpleColor];    [delBtn addTarget:self action:@selector(delBtnClick) forControlEvents:UIControlEventTouchUpInside];    [self.view addSubview:delBtn];    }- (void)action{    //点击按钮添加一个段//    [_segment insertSegmentWithImage:[UIImage imageNamed:@"1.jpg"] atIndex:4 animated:YES];    [_segment insertSegmentWithTitle:@"北航" atIndex:1 animated:YES];}- (void)delBtnClick{
    //删除    [_segment removeSegmentAtIndex:1 animated:YES];}