swift - View 不执行 segue

Question

我有一个 View 集合，我想在点击它们时执行相同的 segue。并且没有 View 执行任何 segue。

class ViewController: UIViewController {

@IBOutlet var categoryViews: [UIView]!


let tapGesture = UIGestureRecognizer(target: self, action: #selector(ViewController.move(tap:)))
override func viewDidLoad() {
    super.viewDidLoad()
    for category in (0..<categoryViews.count) {
        categoryViews[category].addGestureRecognizer(tapGesture)
        categoryViews[category].isUserInteractionEnabled = true
    }
    // Do any additional setup after loading the view.
}
@objc func move(tap: UIGestureRecognizer) {
    performSegue(withIdentifier: "Animals", sender: nil)
}


}

Answer 1

UITapGestureRecognizer 的单个实例可以添加到单个 View 。

在您的代码中，因为您使用的是 UITapGestureRecognizer 的单个实例对于每个 View ，tapGesture将仅添加到最后view在 categoryViews array .

您需要创建不同的 UITapGestureRecognizer每个实例 view在 categoryViews ，即

class ViewController: UIViewController {
    @IBOutlet var categoryViews: [UIView]!

    override func viewDidLoad() {
        super.viewDidLoad()
        categoryViews.forEach {
            let tapGesture = UITapGestureRecognizer(target: self, action: #selector(move(tap:)))
            $0.addGestureRecognizer(tapGesture)
            $0.isUserInteractionEnabled = true
        }
    }

    @objc func move(tap: UITapGestureRecognizer) {
        performSegue(withIdentifier: "Animals", sender: nil)
    }
}