集合 View/Tab 条形控制器崩溃

Question

在我的应用程序中，我使用标签栏控制器在视图控制器之间切换，并且在每个视图控制器上我使用集合视图然后转到不同的页面。当我运行电脑上的应用程序时，一切正常。问题是当我运行我的 phone 上的应用程序时。每当我单击选项卡栏控制器中的选项卡，该选项卡转到上面带有集合视图控制器的页面时，应用程序就会冻结然后崩溃。我认为我已经将问题缩小到集合视图控制器，因为当没有集合视图控制器时，我 phone 上的应用程序不会崩溃。它仅在使用集合视图控制器时崩溃。这可能是什么原因造成的？我已经看过了，但没有发现任何类似的问题。

这是其中一个集合视图控制器的代码：

import UIKit
class HighSchoolController: UIViewController, \UICollectionViewDataSource, UICollectionViewDelegate {

    var identities = [String]()

    let hsImage: [UIImage] = [
        UIImage(named: "dates")!,
        UIImage(named: "athletics_icon")!,
        UIImage(named: "interm-1")!,
        UIImage(named: "lunch_icon")!,
        UIImage(named: "pioneerpress")!,
        UIImage(named: "PIONEERNEWS")!,
        UIImage(named: "clubs_icon")!,
        UIImage(named: "contact_icon")!
    ]

    override func viewDidLoad() {
        super.viewDidLoad()

        identities = ["events", "athletics", "da", "lunch", "pioneer press", "pioneer news", "clubs", "contact"]

        //Navigationbar Shadow
        self.navigationController?.navigationBar.layer.shadowColor = UIColor.black.cgColor
        self.navigationController?.navigationBar.layer.shadowOffset = CGSize(width: 0.0, height: 4.0)
        self.navigationController?.navigationBar.layer.shadowRadius = 9.0
        self.navigationController?.navigationBar.layer.shadowOpacity = 0.9
        self.navigationController?.navigationBar.layer.masksToBounds = false

        // Do any additional setup after loading the view.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return hsImage.count
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let hsCell = collectionView.dequeueReusableCell(withReuseIdentifier: "hsCell", for: indexPath) as! HighSchoolCell


        hsCell.hsImage.image = hsImage[indexPath.item]

        hsCell.layer.cornerRadius = (hsCell.layer.frame.height) / 2.0;
        hsCell.layer.masksToBounds = true

        return hsCell
    }

    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        let vcName = identities[indexPath.row]
        let viewController = storyboard?.instantiateViewController(withIdentifier: vcName)
        self.navigationController?.pushViewController(viewController!, animated: true)
    }
}

Answer 1

在我看来，它一定是在您的 self.navigationController?... 线路上崩溃了。我的猜测是您将 CollectionViewController 用作 TabBarController 中选项卡的 rootViewController。

如果您想使用 navigationController 在标签内导航，您需要附加 navigationController 作为标签的根，然后将 CollectionViewController 设置为rootViewController 的 navigationController.

您需要像 TabBarController > NavigationViewController > CollectionViewController

这样的层次结构，而不是 TabBarController > CollectionViewController

Answer 2

我通过在我的标签栏控制器中这样做来解决这个问题

让 layout1 = UICollectionViewFlowLayout() 让 cv1 = CollectionView1(collectionViewLayout: layout1)
让layout2 = UICollectionViewFlowLayout() 让 cv2 = CollectionView1(collectionViewLayout: layout2)
让layout3 = UICollectionViewFlowLayout() 让 cv3 = CollectionView1(collectionViewLayout: layout3)
让layout4 = UICollectionViewFlowLayout() 让 cv4 = CollectionView1(collectionViewLayout: layout4)

集合 View/Tab 条形控制器崩溃

Collection View/Tab Bar Controller Crashes

xcode

uitabbarcontroller

ios

uicollectionview