ios - didSelectItemAt 未被调用

Question

我的 Collection View 已准备就绪，我正在尝试执行 didSelectItemAt 以转到详细 View 。但我只想测试记录每个项目，但它没有记录。

我已经设置了所有代表:

*

class ViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout, UISearchBarDelegate {*

    @IBOutlet weak var activityIndicatorView: UIActivityIndicatorView!
    @IBOutlet weak var searchBar: UISearchBar!
    @IBOutlet weak var collection: UICollectionView!

    override func viewDidLoad() {
        super.viewDidLoad()
        collection.dataSource = self
        collection.delegate = self
        searchBar.delegate = self

        activityIndicatorView.isHidden = true


        let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "dismissKeyboard")
        view.addGestureRecognizer(tap)
    }

*

我做错了什么？

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    let movie : Movie

    movie = MOVIE_ARRAY[indexPath.row]
    print(movie.plot)
}

Answer 1

您已经在 View 上添加了一个 TapGestureRecognizer。 TapGestureRecognizer 有一个属性 cancelsTouchesInView。

- var cancelsTouchesInView: Bool { get set }

A Boolean value affecting whether touches are delivered to a view when a gesture is recognized.

默认情况下为 true 并且将阻止调用 didSelectItemAt，因为在识别点击后触摸不会传递到 View 。您需要像这样将其设置为 false:

let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "dismissKeyboard")
tap.cancelsTouchesInView = false
view.addGestureRecognizer(tap)