在performSegueWithIdentifier之后不调用prepareForSegue

Question

我是iOS开发的新手。有许多重复的问题（抱歉）。但我无法解决这个问题。

调用performSegueWithIdentifier后不会调用prepareForSegue。

show segue标识符命名为＆＃39; segue1＆＃39;。 从ViewController按Ctrl键拖动到DetailViewController。

我错过了什么吗？

ViewController.swift：

class ViewController: UIViewController {

override func viewDidLoad() {
    super.viewDidLoad()
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
}

@IBAction func buttonTapped(sender: AnyObject) {
    print("ViewController - buttonTapped()")
    performSegueWithIdentifier("segue1", sender: self)
}

override func performSegueWithIdentifier(identifier: String, sender: AnyObject?) {
    print("ViewController - performSegueWithIdentifier(): \(identifier)")
}

override func shouldPerformSegueWithIdentifier(identifier: String, sender: AnyObject?) -> Bool {
    print("ViewController - shouldPerformSegueWithIdentifier()")
    return true
}

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    print("ViewController - prepareForSegue(): \(segue.identifier!)")
}
}

DetailViewController.swift：

class DetailViewController: UIViewController {

override func viewDidLoad() {
    super.viewDidLoad()

    print("DetailViewController - viewDidLoad()")
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
}
}

这是screenshot of storyboard。

输出（点击按钮后）

ViewController - buttonTapped()
ViewController - performSegueWithIdentifier(): segue1

Answer 1

你没有调用超级 - 添加以下内容将消息发送给父类（这将反过来激活segue）

super.performSegueWithIdentifier(identifier, sender: sender)