UI_UISegmentedControl 控件

创建控件

- (void)createSegmentControl
{
    UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] initWithItems:@[@"全部", @"分类", @"进行中"]];
    segmentedControl.frame = CGRectMake(80, 30, 180, 30);

    // 默认选中第一个
    segmentedControl.selectedSegmentIndex = 0;
    // 改变控件和字体颜色
    [segmentedControl setTintColor:[UIColor redColor]];

    // 改变某一个 segmentedControl 的标题
    [segmentedControl setTitle:@"不是全部" forSegmentAtIndex:0];

    // 设置图片
    [segmentedControl setImage:[UIImage imageNamed:@"2.png" ] forSegmentAtIndex:2];

    // 获取共有多少项
    NSLog(@"按钮共有%lu个", segmentedControl.numberOfSegments);

    [self addSubview:segmentedControl];
    [segmentedControl release];


    // 给 segmentedControl 绑定点击事件（最重要）
    [segmentedControl addTarget:self action:@selector(segmentedControlAction:) forControlEvents:UIControlEventValueChanged];

}

实现点击事件

- (void)segmentedControlAction:(UISegmentedControl *)sender
{
    // 通过 selectedSegmentIndex 判断点中了哪一个 Segment
    /*

     if (sender.selectedSegmentIndex == 0) {
     NSLog(@"全部");
     } else if (sender.selectedSegmentIndex == 1) {
     NSLog(@"分类");
     } else if (sender.selectedSegmentIndex == 2) {
     NSLog(@"进行中");
     }

     */

    switch (sender.selectedSegmentIndex) {
        case 0:
        {
           NSLog(@"全部");
            break;
        }
        case 1:
            NSLog(@"分类");
            break;
        case 2:
            NSLog(@"进行中");
            break;

        default:
            break;
    }

}