似乎有一个类似的问题here,但没有解决我的问题。
我在viewController中创建了两个collectionViews,如下所示:
let y = self.view.frame.height
titleView = UIView(frame : CGRect(x: 0 , y: 50 , width: self.view.frame.width, height: y - 100 ))
let middle = CGPoint(x: 10, y: titleView.bounds.height/10)
let frame = CGRect(origin: middle , size: CGSize(width: self.view.frame.width - 20 , height: 70))
let layout = UICollectionViewFlowLayout()
fontCollection = UICollectionView(frame: frame, collectionViewLayout: layout)
fontCollection.dataSource = self
fontCollection.delegate = self
fontCollection.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "fontsIdentifier")
fontCollection.backgroundColor = UIColor.white
// Do any additional setup after
colorCollection = UICollectionView(frame: frame, collectionViewLayout: layout)
//colorCollection.frame.origin.y = fontCollection.frame.origin.y + (2 * fontCollection.frame.height)
colorCollection.dataSource = self
colorCollection.delegate = self
colorCollection.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "colorsIdentifier")
colorCollection.backgroundColor = UIColor.white
// Do any additional setup after
这些是我的
UICollectionViewDataSource
方法:func numberOfSections(in collectionView: UICollectionView) -> Int {
collectionView.reloadData()
collectionView.collectionViewLayout.invalidateLayout()
return 1
}
public func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if(collectionView == self.colorCollection ){
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "colorsIdentifier", for: indexPath)
cell.backgroundColor = .darkGray
return cell
} else {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "fontsIdentifier", for: indexPath)
cell.backgroundColor = .gray
return cell
}
}
然后,我使用
segmented control
在两个collectionViews
之间切换。到目前为止,一切都按预期进行,但是当我想为
collectionView
分配不同数量的单元格时,出现此错误:UICollectionView接收具有索引的单元格的布局属性
不存在的路径:{length =
2,路径= 0-6}
这是我的
numberOfItemsInSection
方法public func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
if(collectionView == self.colorCollection ){ return 9 }
else if(collectionView == self.fontCollection ){ return 6 }
return 0
}
难道我做错了什么?我想念什么?
最佳答案
正如@ Rajesh73在评论中指出的那样,问题在于为collectionViews
分配了一种布局。所以我给了两个collectionViews不同的布局,它解决了这个问题。
因此取代
let layout = UICollectionViewFlowLayout()
fontCollection = UICollectionView(frame: frame, collectionViewLayout: layout)
colorCollection = UICollectionView(frame: frame, collectionViewLayout: layout)
与
let fontsLayout = UICollectionViewFlowLayout()
fontCollection = UICollectionView(frame: frame,collectionViewLayout: fontsLayout)
let colorsLayout = UICollectionViewFlowLayout()
colorsCollection = UICollectionView(frame: frame collectionViewLayout: colorsLayout)
解决了这个问题。