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import UIKitclass ViewController: UIViewController { var count = 0 //声明导航条 var navigationBar:UINavigationBar? override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view, typically from a nib. //实例化导航条 navigationBar = UINavigationBar(frame: CGRectMake(0, 20, 320, 44)) self.view.addSubview(navigationBar!) onAdd() } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } //增加导航项函数 func onAdd(){ count++ //给导航条增加导航项 navigationBar?.pushNavigationItem(onMakeNavitem(), animated: true) } //删除导航项函数 func onRemove(){ if count > 1{ //减少导航项数量 count-- //从导航条中移除最后一个导航项 navigationBar?.popNavigationItemAnimated(true) } } //创建一个导航项 func onMakeNavitem()->UINavigationItem{ var navigationItem = UINavigationItem() //创建左边按钮 var leftBtn = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Add, target: self, action: "onAdd") //创建右边按钮 var rightBtn = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Cancel, target: self, action: "onRemove") //设置导航栏标题 navigationItem.title = "第\(count)个导航项" //设置导航项左边的按钮 navigationItem.setLeftBarButtonItem(leftBtn, animated: true) //设置导航项右边的按钮 navigationItem.setRightBarButtonItem(rightBtn, animated: true) return navigationItem }} |
Swift - 导航条（UINavigationBar）的使用
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原文地址：http://www.cnblogs.com/Free-Thinker/p/4838651.html
