swift - UISegmentedControl 的用法

一、创建控件，并监听控件选择值

/*选项除了文字还可以是图片   as关键字的作用就是字面意思：类型转换*/
//        let items = ["选项一","选项二",UIImage(named:"hgl.jpeg")!] as [AnyObject]
        let items = ["选项一","选项二"]
        let segmented = UISegmentedControl(items:items)
//        segmented.center = self.view.center
        segmented.frame = CGRectMake(80, 410, SCREEN_WIDTH - 160, 30)
        segmented.selectedSegmentIndex = 1 //默认选中第二项
        segmented.addTarget(self, action: #selector(segmentedClick), forControlEvents: UIControlEvents.ValueChanged)//添加值改变监听
        self.view.addSubview(segmented)

方法的实现

func segmentedClick(segmented:UISegmentedControl) {

        //获得选项的索引
        print(segmented.selectedSegmentIndex)

        //获得选择的文字
        print(segmented.titleForSegmentAtIndex(segmented.selectedSegmentIndex))

    }

二、其他的属性

        //选择空间中选项的添加和删除
        segmented.insertSegmentWithTitle("新增选项", atIndex: 2, animated: true)
        //添加图片选项
        segmented.insertSegmentWithImage(UIImage(named: "hgl.jpeg"), atIndex: 1, animated: true)
        //移除选项
        segmented.removeSegmentAtIndex(1, animated: true)

        //修改选项的颜色（包括图片选项）
        segmented.tintColor = UIColor.redColor()

        //修改选项文字/图片
        segmented.setTitle("swift", forSegmentAtIndex: 2)
        segmented.setImage(UIImage(named: "hgl.jpeg"), forSegmentAtIndex: 2)

        //修改选项内容偏移位置
        segmented.setContentOffset(CGSizeMake(5, 3), forSegmentAtIndex: 2)