didSelectItemAt 未被调用

Question

我的收藏视图已准备就绪，我正在尝试使用didSelectItemAt 转到详细视图。但我只想测试记录每个项目并且它没有记录。

我已经设置了所有的代表：

*

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

您在视图上添加了TapGestureRecognizer。 TapGestureRecognizer 有一个属性cancelsTouchesInView。

- var cancelsTouchesInView: Bool { get set }

一个布尔值，影响在识别手势时是否将触摸传递到视图。

默认情况下这是true，并且会阻止调用 didSelectItemAt，因为在识别到点击后触摸不会传递到视图。 您需要将其设置为false，如下所示：

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