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刚发现一个ios13下的BUG,同样代码ios12没问题 #53
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@nirvana72
Description
UICollectionViewCell高度自适应,
用的是自定义cell 中的 preferredLayoutAttributesFitting 方法来返回每个cell的经计算后的不同高度
下拉刷新时,崩溃了, IOS12下是好的,也在项目中用了好久了
最小重现代码如下:
`import UIKit
import PullToRefreshKit
class TestViewController: UIViewController, UICollectionViewDataSource {
@IBOutlet weak var collectionView: UICollectionView!
@IBOutlet weak var layout: UICollectionViewFlowLayout!
override func viewDidLoad() {
super.viewDidLoad()
layout.estimatedItemSize = CGSize(width: UIScreen.main.bounds.width, height: 0)
collectionView.dataSource = self
collectionView.register(MyCollectionViewCell.self, forCellWithReuseIdentifier: "cell")
let refreshHeader = ElasticRefreshHeader()
self.collectionView.configRefreshHeader(with: refreshHeader, container: self) { [weak self] in
print("refreshHeader")
self?.collectionView.switchRefreshHeader(to: .normal(.success, 0.5))
}
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 100
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! MyCollectionViewCell
cell.backgroundColor = UIColor.red
return cell
}
}
class MyCollectionViewCell: UICollectionViewCell {
override func preferredLayoutAttributesFitting(_ layoutAttributes: UICollectionViewLayoutAttributes) -> UICollectionViewLayoutAttributes {
var newFrame = layoutAttributes.frame
newFrame.size.height = 100 // 这里根据内容计算出每个cell的不同高度
layoutAttributes.frame = newFrame
return layoutAttributes
}
}`
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