Swift将导航栏标题修改成自定义视图（图片、按钮、分段选择等）

import UIKit
 
class ViewController: UIViewController {
 
    override func viewDidLoad() {
        super.viewDidLoad()
 
        let items=["电话","短信"] as [AnyObject]
        let segmented=UISegmentedControl(items:items)
        segmented.center=self.view.center
        segmented.selectedSegmentIndex=0 //默认选中第1项
        segmented.addTarget(self, action: "segmentDidchange:",
            forControlEvents: UIControlEvents.ValueChanged)  //添加值改变监听
        self.navigationItem.titleView = 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))
    }
 
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
}