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[英]Hello, I am using swift and I am trying to change a label of a collection view cell when the a collection view cell is selected
[英]Trying to update a collection view when tableview cell matches a criteria Swift
我在同一个视图控制器中有一个表示月份的calendarTableview
和一个表示当前开放时间的30分钟时间段的timeSlotCollectionView
。 我的意图是在将视图控制器加载到calendarTableview
cellForRowAt
我检查它是否是当前日期并将其设置为选中,并再次加载timeSlotCollectionView
一个标准。 只有当我在物理上选择行时触发didSelectRowAt
而不是第一次加载时,它才能正常工作。 所有更新都由我在cellForRowAt
和didSelectRowAt
调用的函数完成,但在加载时不更新timeSlotCollectionView
。 我在我的应用程序的下一个阶段遇到了类似的问题,当你实际选择一个时间段并且我之前的问题已经解决了,但我不能在这种情况下应用它。 你能看出我这次错在哪里吗?
功能是:
对于calendarTableView
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "calendarCell", for: indexPath) as! CalendarTableViewCell
// Configure the cell...
let date = datesArray[indexPath.row]
print(date)
let calendar = Calendar.current
let components = calendar.dateComponents([.year, .month, .day, .weekday], from: date)
cell.dayLabel.text = "\(String(describing: components.day!))" + " " + "\(dayNamesArray[components.weekday! - 1])"
cell.cellWeekday = components.weekday!
print("cell weekday is: \(cell.cellWeekday!)") // prints correct weekday
cell.cellId = "\(String(format:"%04d", components.year!))" + "\(String(format:"%02d", components.month!))" + "\(String(format:"%02d", components.day!))"
self.selectedDate = cell.cellId // used for time slots cellId
// highlighting current day cell
if indexPath.row == self.actualDay - 1 && self.actualMonth == self.displayedMonth {
cell.dayLabel.backgroundColor = UIColor.red.withAlphaComponent(0.3)
// emulate user selecting the cell
tableView.selectRow(at: indexPath, animated: false, scrollPosition: UITableViewScrollPosition.none) // changing to .middle makes the tableview go looping
print(" @@@@@@@@@@@@@@@@@@@@@@@@@@ selected cell weekday is: \(cell.cellWeekday!) @@@@@@@@@@@@@@@@@@@@ ")
self.updateTimeSlots(selectedCell: cell)
// self.actualWeekday = cell.cellWeekday!
// self.selectedDate = cell.cellId
// calculateOpenTimeSlots()
}
let cornerRadius: CGFloat = 5
cell.layer.cornerRadius = cornerRadius
cell.clipsToBounds = true
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let cell = tableView.cellForRow(at: indexPath) as! CalendarTableViewCell
self.updateTimeSlots(selectedCell: cell)
// self.actualWeekday = cell.cellWeekday!
// self.selectedDate = cell.cellId
// print(" selected cell weekday is: \(cell.cellWeekday!)")
// calculateOpenTimeSlots()
}
对于timeSlotCollectionView
:
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "timeSlotCell", for: indexPath) as! TimeSlotCollectionViewCell
// let booking = self.fetchedResultController.object(at: indexPath)
// Configure the cell
cell.timeLabel.text = timeSlotArray[indexPath.row]
cell.cellId = Int64("\(String(describing: self.selectedDate))" + self.timeStringToStringConvert(timeSlotArray[indexPath.row]))!
// method two USING fetchResultController
if (self.fetchedResultController.fetchedObjects?.count)! > 0 {
for value in self.fetchedResultController.fetchedObjects! {
if Int64(value.bookingId!) == cell.cellId {
print(" match found")
print("Index is: \(index)")
print("cell time is: \(timeSlotArray[indexPath.row])")
print("time slot cell id is: \(String(describing: cell.cellId))")
print("booking id: \(bookingId)")
// cell.backgroundColor = UIColor.red.withAlphaComponent(0.8)
cell.bookingState.backgroundColor = UIColor.red.withAlphaComponent(0.8)
}
}
}
print(" cell.cellId is : \(String(describing: cell.cellId!))")
print(" @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ time slot created @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ ")
// Method one : USING ARRAY works in realtime
// if bookedTimeSlotsArray.count > 0 {
// for index in 0...bookedTimeSlotsArray.count - 1 {
// let bookingId = bookedTimeSlotsArray[index].bookingId
//
// if cell.cellId == bookingId {
// print(" match found")
// print("Index is: \(index)")
// print("cell time is: \(timeSlotArray[indexPath.row])")
// print("time slot cell id is: \(String(describing: cell.cellId))")
// print("booking id: \(bookingId)")
//// cell.backgroundColor = UIColor.red.withAlphaComponent(0.8)
// cell.bookingState.backgroundColor = UIColor.red.withAlphaComponent(0.8)
// }
// }
// }
return cell
}
和值更新:
func updateTimeSlots(selectedCell: CalendarTableViewCell) {
self.actualWeekday = selectedCell.cellWeekday!
self.selectedDate = selectedCell.cellId
print(" selected cell weekday is: \(selectedCell.cellWeekday!)")
fetchBookings()
calculateOpenTimeSlots()
}
这两个细胞之间的时间间隔是否可以延迟? 在我的另一个问题中就是这种情况。 非常感谢一如既往。
我发现了问题所在。 我在计算预订时隙的函数中刷新了timeSlotCollectionView
。 我想,从该函数填充的数组和从该数组中读取的timeSlotCollectionView
以绘制其单元格之间的时间差距很小,从而产生普通单元格。 我修改了cellForItemAt
所以我可以直接从获取的结果执行条件检查,这样我就可以绕过该函数。 现在选择calendarTableView
的正确单元格,并使用正确的单元格填充timeSlotCollectionView
。 我希望这可以帮助其他人面对同样的问题。
这是新功能:
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "timeSlotCell", for: indexPath) as! TimeSlotCollectionViewCell
// let booking = self.fetchedResultController.object(at: indexPath)
// Configure the cell
cell.timeLabel.text = timeSlotArray[indexPath.row]
cell.cellTime = timeSlotArray[indexPath.row]
cell.cellId = Int64("\(String(describing: self.selectedDate))" + self.timeStringToStringConvert(timeSlotArray[indexPath.row]))!
// method two USING fetchResultController
if (self.fetchedResultController.fetchedObjects?.count)! > 0 {
for valueStart in self.fetchedResultController.fetchedObjects! {
// booking start match
if timeStringToStringConvert(cell.cellTime) == timeStringToStringConvert(valueStart.bookingStart!) {//} && cell.cellTime <= timeStringToStringConvert(valueStart.bookingEnd!) {
print(" match found")
// print("Index is: \(index)")
print("cell time is: \(timeSlotArray[indexPath.row])")
print("time slot cell id is: \(String(describing: cell.cellId))")
print("booking id: \(valueStart.bookingId!)")
// cell.backgroundColor = UIColor.red.withAlphaComponent(0.8)
cell.bookingState.backgroundColor = UIColor.red.withAlphaComponent(0.8)
cell.backgroundColor = UIColor.red.withAlphaComponent(0.25)
}
else if timeStringToStringConvert(cell.cellTime) > timeStringToStringConvert(valueStart.bookingStart!) && timeStringToStringConvert(cell.cellTime) < timeStringToStringConvert(valueStart.bookingEnd!){
print(" Mid slot found")
print(" mid slot id is: \(String(describing: cell.cellId))")
cell.bookingState.backgroundColor = UIColor.red.withAlphaComponent(0.3)
cell.backgroundColor = UIColor.red.withAlphaComponent(0.15)
cell.isUserInteractionEnabled = false
}
print("bookingId is: \(valueStart.bookingId!)")
}
}
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