error: Execution was interrupted, reason: internal ObjC exception breakpoint(-5)

Question

我正在尝试显示带有自定义 UICollectionViewCell 的 UICollectionView，应用程序崩溃并且出现以下错误：

2018-07-21 09:14:10.498749+0300 Shippers[18104:819840] *** Assertion failure in -[NSISEngine _optimizeWithoutRebuilding], /BuildRoot/Library/Caches/com.apple.xbs/Sources/Foundation_Sim/Foundation-1452.23/Foundation/Layout.subproj/IncrementalSimplex/NSISEngine.m:1888 error: Execution was interrupted, reason: internal ObjC exception breakpoint(-5).. The process has been returned to the state before expression evaluation.

此 RankingVC 正在添加为 ChildViewController。不确定问题出在哪里，但如果我注释掉文件中的所有 UICollectionView 内容，应用程序不会崩溃，所以一定有问题。

class RankingVC: UIViewController {

@IBOutlet weak var collectionView: UICollectionView!
override func viewDidLoad() {
    super.viewDidLoad()
    setupCollectionViewDelegates()
    registerCells()
    view.backgroundColor = .red
}
}

extension RankingVC  : UICollectionViewDelegate, UICollectionViewDataSource {

    func setupCollectionViewDelegates() {
        collectionView.delegate = self
        collectionView.dataSource = self
    }

    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 1
    }

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 10
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: CellIdentifier.rankingCVCell, for: indexPath) as! RankingCVCell
        return cell 
    }

    func registerCells() {
        RegisterCVCells.registerCell(withNibName: CellIdentifier.rankingCVCell, forCollectionView: collectionView)
    }
}

Answer 1

问题是我以编程方式将 UICollectionViewCell 的高度设置为高于单元格本身。确保每个单元格的最小高度至少等于最短（就高度而言）的单元格可以解决此问题。