Swift - 分段选择控件（UISegmentedControl）的用法

1，选择控件的创建，并监听控件选择值
{
import UIKit

class ViewController: UIViewController {

override func viewDidLoad() {
    super.viewDidLoad()
     
    //选项除了文字还可以是图片
    let items=["选项一","选项二",UIImage(named: "star")!] as [AnyObject]
    let segmented=UISegmentedControl(items:items)
    segmented.center=self.view.center
    segmented.selectedSegmentIndex=1 //默认选中第二项
    segmented.addTarget(self, action: "segmentDidchange:",
        forControlEvents: UIControlEvents.ValueChanged)  //添加值改变监听
    self.view.addSubview(segmented)
}
 
func segmentDidchange(segmented:UISegmentedControl){
    //获得选项的索引
    print(segmented.selectedSegmentIndex)
    //获得选择的文字
    print(segmented.titleForSegmentAtIndex(segmented.selectedSegmentIndex))
}

}

2，选择控件中选项的添加和删除

//添加文字选项
segmented.insertSegmentWithTitle("新增选项",atIndex:1,animated:true);
//添加图片选项
segmented.insertSegmentWithImage(UIImage(named:"icon")!,atIndex:1,animated: true)
//移除选项
segmented.removeSegmentAtIndex(1,animated:true);

3，修改选项颜色（包括图片选项）
1
segmented.tintColor=UIColor.redColor()

4，修改选项文字
1
segmented.setTitle("swfit",forSegmentAtIndex:1)

5，修改选项图片
1
segmented.setImage(UIImage(named:"icon"),forSegmentAtIndex:2)

6，修改选项内容偏移位置
1
segmented.setContentOffset(CGSizeMake(10,7),forSegmentAtIndex:1)