Question

在我的应用程序中，我使用Tab栏控制器在视图控制器之间进行切换，并且在每个视图控制器上，我都使用集合视图然后转到不同的页面。当我在计算机上运行该应用程序时，一切正常。问题是当我在手机上运行该应用程序时。每当我单击选项卡栏控制器中的某个选项卡，该选项卡转到带有收集视图控制器的页面时，该应用程序就会冻结，然后崩溃。我认为我已将问题归结为集合视图控制器，因为没有集合视图控制器时，手机上的应用程序不会崩溃。仅当使用集合视图控制器时，它才会崩溃。是什么原因造成的？我看过了，但是没有发现任何类似的问题。

以下是集合视图控制器之一的代码：

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

我通过在标签栏控制器中执行此操作来弄清楚了

让layout1 = UICollectionViewFlowLayout（）let 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）

Answer 2

在我看来，它肯定在您的self.navigationController?...行上崩溃了。我的猜测是您正在使用CollectionViewController作为rootViewController中选项卡的TabBarController。

如果要使用navigationController在选项卡中导航，则需要附加navigationController作为选项卡的根，然后将CollectionViewController设置为{{ rootViewController中的1}}。

您需要像navigationController这样的层次结构，而不是TabBarController > CollectionViewController的层次结构

收藏夹视图/标签栏控制器崩溃

2 个答案: