我的 View 有一个 TableView ，每行都有一个 Collection View 。集合单元格有一个文本字段(以及它的一个子类)、一个标签和一个 TextView ，它们都是全尺寸的，除了一个是隐藏的，这取决于单元格位置。
当其中一个文本字段被编辑时，委托(delegate) (CollectionView) 将新值传递回 View Controller 以更改数组，然后重新加载适当的单元格，因为其中有计算数据。
问题是第二次编辑其中一个文本字段时，两个单元格交换宽度，如果您再编辑文本字段两次，它似乎会交换回来，但边框停留在错误的位置。
初始加载后的表:
两次更改数量后的表格
文本字段和 View 委托(delegate)方法
func textFieldDidEndEditing(_ textField: UITextField) {
let currencyField = textField as! CurrencyField
let indexPath = indexPathForCellWithSubview(cellSubview: textField)!
(dataSource as! DetailViewController).changeData(tableRow: tag, collectionItem: indexPath.row, newData: currencyField.decimal)
let indexPaths: [IndexPath] = [IndexPath(row: 1, section: 0),IndexPath(row: 2, section: 0),IndexPath(row: 4, section: 0),IndexPath(row: 5, section: 0)]
collectionViewLayout.invalidateLayout()
reloadItems(at: indexPaths)
}
func textViewDidEndEditing(_ textView: UITextView) {
let indexPath = indexPathForCellWithSubview(cellSubview: textView)!
let indexPaths: [IndexPath] = [IndexPath(row: 1, section: 0),IndexPath(row: 2, section: 0),IndexPath(row: 4, section: 0),IndexPath(row: 5, section: 0)]
let dec = textView.text!.decimalFromString()
if(dec != 0){
(dataSource as! DetailViewController).changeData(tableRow: tag, collectionItem: indexPath.row, newData: dec)
reloadItems(at: indexPaths)
} else {
(dataSource as! DetailViewController).changeData(tableRow: tag, collectionItem: indexPath.row, newData: textView.text!)
}
collectionViewLayout.invalidateLayout()
}
数组
var dummyData: [[Any]] = [
["Fencing garden",Decimal(1),Decimal(8500.00)],
["Ditching",Decimal(1),Decimal(1950.00)],
["Fred",Decimal(1),Decimal(1950.00)]]
单元格宽度
let table4Cells: [Int] = [310,65,100,105]
let table6Cells: [Int] = [250,40,80,50,80,80]
数据设置与获取
func changeData(tableRow: Int, collectionItem: Int, newData: Any){
var qty: Decimal = dummyData[tableRow][1] as! Decimal
var cost: Decimal = dummyData[tableRow][2] as! Decimal
var total: Decimal
switch(collectionItem){
case 1:
qty = newData as! Decimal
case 2:
cost = newData as! Decimal
case 3:
total = newData as! Decimal
cost = total / qty
case 5:
total = newData as! Decimal
cost = (total / qty) / (1 + vatPC)
default: dummyData[tableRow][collectionItem] = newData
}
dummyData[tableRow][1] = qty
dummyData[tableRow][2] = cost
}
func collectionViewCellText(tag: Int, row: Int) -> String {
var text: String = ""
if(tag == 666){
if(!vatRegistered && row == 3){
return tableHeaderText[5]
} else {
return tableHeaderText[row]
}
} else {
let qty: Decimal = dummyData[tag][1] as! Decimal
let cost: Decimal = dummyData[tag][2] as! Decimal
switch(row){
case 3:
if(vatRegistered){
text = String(describing: vatPC * 100)
} else {
text = String(describing: qty * cost)
}
case 4:
text = String(describing: cost * vatPC)
case 5:
text = String(describing: qty * (cost * (1 + vatPC)))
default:
text = String(describing: dummyData[tag][row])
}
}
return text
}
索引路径中单元格的大小
func collectionView(_ collectionView: UICollectionView,
layout collectionViewLayout: UICollectionViewLayout,
sizeForItemAt indexPath: IndexPath) -> CGSize {
if(vatRegistered){
return CGSize(width: self.table6Cells[indexPath.row], height:self.collectionCellHeight)
}
return CGSize(width: self.table4Cells[indexPath.row], height:self.collectionCellHeight)
}
索引路径处行的单元格
func collectionView(_ collectionView: UICollectionView,
cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell",
for: indexPath as IndexPath) as! InvoiceCollectionViewCell
cell.textView.delegate = self
if(collectionView is RJCollectionView){
cell.currencyField.delegate = collectionView as! RJCollectionView
cell.textView.delegate = collectionView as! RJCollectionView
}
if(collectionView.tag == 666){
if(indexPath.row == 0){
cell.addBorder(side: .left, thickness: 0.5, color: UIColor.black)
cell.addBorder(side: .right, thickness: 0.5, color: UIColor.black)
cell.addBorder(side: .top, thickness: 0.5, color: UIColor.black)
cell.addBorder(side: .bottom, thickness: 0.5, color: UIColor.black)
} else {
cell.label.textAlignment = NSTextAlignment.center
cell.textView.textAlignment = NSTextAlignment.center
cell.addBorder(side: .right, thickness: 0.5, color: UIColor.black)
cell.addBorder(side: .top, thickness: 0.5, color: UIColor.black)
cell.addBorder(side: .bottom, thickness: 0.5, color: UIColor.black)
}
} else {
if(indexPath.row == 0){
cell.addBorder(side: .left, thickness: 0.5, color: UIColor.black)
cell.addBorder(side: .right, thickness: 0.5, color: UIColor.black)
cell.addBorder(side: .bottom, thickness: 0.5, color: UIColor.black)
} else {
cell.label.textAlignment = NSTextAlignment.center
cell.textView.textAlignment = NSTextAlignment.center
cell.addBorder(side: .right, thickness: 0.5, color: UIColor.black)
cell.addBorder(side: .bottom, thickness: 0.5, color: UIColor.black)
}
if(vatRegistered){
switch(indexPath.row){
case 2,5: cell.textType(i: "CurrencyView")
case 3:
cell.textType(i: "TextView")
cell.textView.isUserInteractionEnabled = false
case 4:
cell.currencyField.isUserInteractionEnabled = false
cell.textType(i: "CurrencyView")
default: cell.textType(i: "TextView")
}
} else {
switch(indexPath.row){
case 2,3: cell.textType(i: "CurrencyView")
default: cell.textType(i: "TextView")
}
}
}
if(collectionView.tag == 0){
print(cell.currencyField.bounds.width)
}
cell.text = collectionViewCellText(tag: collectionView.tag, row: indexPath.row)
return cell
}
注意:collectionview.tag 是 Collection View 所在的表中的行。666 是标题行。 vatRegistered 是一个 bool 值，当 true 将 Collection View 的宽度设置为 6 而不是 4 个单元格
最佳答案
更新:
我把我的整个项目剥离到一个二级项目中，并将collectionview直接放到主视图中，但仍然有问题
问题似乎是由 contentView 没有调整到单元格的大小引起的，这似乎是 iOS 的一个错误，所以当单元格被插入并在重新加载时弹出到堆栈上时，它们会切换顺序，但无论如何设置单元格大小的原因没有重置 contentView 的大小。
添加:
cell.contentView.frame = cell.bounds;
cell.contentView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
sizeforitem 流布局方法修复了奇怪的偏移量。
错误位置的边框归因于我用来添加边框的 uiview 扩展，它只是将设置宽度的 View 添加到它要求的任何边缘，重复使用单元格时必须将其删除
关于ios - UICollectionView 单元格在 reloadData() 上不正确地调整大小，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/47337873/