iOS UISegmentedControl控件详解

- (void)viewDidLoad {
    [super viewDidLoad];

    // 初始化，添加分段名，会自动布局
    self.segmentedControl = [[UISegmentedControl alloc] initWithItems:@[@"正在销售", @"已下架"]];
    self.segmentedControl.frame = CGRectMake(-5, 50, SCREENWIDTH+10, 30);

    // 设置整体的色调
    self.segmentedControl.tintColor = cmGreen;

    // 设置分段名的字体
    NSDictionary *dic = [NSDictionary dictionaryWithObjectsAndKeys:cmGreen,NSForegroundColorAttributeName,[UIFont systemFontOfSize:18],NSFontAttributeName ,nil];
    [self.segmentedControl setTitleTextAttributes:dic forState:UIControlStateNormal];

    // 设置初始选中项
    self.segmentedControl.selectedSegmentIndex = 0;

    [self.segmentedControl addTarget:self action:@selector(selectItem:) forControlEvents:UIControlEventValueChanged];// 添加响应方法

    // 设置样式的segmentedControlStyle属性在iOS 7.0之后将不再起作用

    // 设置点击后恢复原样，默认为NO，点击后一直保持选中状态
    self.segmentedControl.momentary = YES;

    // 在指定序号处插入一个分段，会自动布局
    [self.segmentedControl insertSegmentWithTitle:@"已删除" atIndex:2 animated:NO];

    // 在指定序号处移除一个分段，会自动布局
    [self.segmentedControl removeSegmentAtIndex:2 animated:NO];

    // 设置指定序号处的分段的宽度
    [self.segmentedControl setWidth:50.0 forSegmentAtIndex:1];

    // 获取指定序号处标题的内容
    NSLog(@"%@", [self.segmentedControl titleForSegmentAtIndex:1]);

    // 获取指定序号处标题的宽度
    NSLog(@"%f", [self.segmentedControl widthForSegmentAtIndex:1]);

    // 设置指定序号处的分段不可选
    [self.segmentedControl setEnabled:NO forSegmentAtIndex:1];

    [self.view addSubview:self.segmentedControl];

}

- (void)selectItem:(UISegmentedControl *)sender {
    if (sender.selectedSegmentIndex == 0) {
        NSLog(@"正在销售");
    } else {
        NSLog(@"已下架");
    }
}