ios - UINavigationItem 标题执行操作

Question

当我点击导航栏的标题时，有什么好方法可以让弹出窗口(特别是日期选择器)出现？我实际上使用的是 xcode6/swift，但假设 ios7 解决方案就足够了!

非常感谢!

Answer 1

您可以将按钮设置为标题 View

override func viewDidLoad() {
    super.viewDidLoad()

    var button:UIButton  = UIButton.buttonWithType(UIButtonType.System) as UIButton

    (button as UIView).frame = CGRectMake(0, 0, 100, 44)
    button.setTitle("Your title", forState: UIControlState.Normal)
    button.addTarget(self, action: "buttonClicked:", forControlEvents: UIControlEvents.TouchUpInside)
    self.navigationItem.titleView = button;
}

func buttonClicked(sender:UIButton)
{

    UIAlertView(title: "Message title", message: "POP UP", delegate: nil, cancelButtonTitle: "OK").show()

}

编辑 UIAlertView 已在 iOS8 中弃用。改用 UIAlertViewController

func buttonClicked(sender:UIButton)
{

  var alert = UIAlertController(title: "Title", message: "Message", preferredStyle: UIAlertControllerStyle.Alert)
 alert.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default, handler: nil))
 self.presentViewController(alert, animated: true, completion: nil)

}