编辑完成后自动将单元格中的更改保存到对象？
Automatically saving changes in a cell to object when editing finishes?
我在我的项目中遇到了一场真正的噩梦，我需要为数组中的每个对象将单元格内容保存到一个对象中。我无法通过遍历 table 个单元格和数组对象并尝试将它们全部匹配来使它工作。
所以我的下一个想法是将 didFinishEditing 相关函数添加到 cellForRowAt 函数中？
我也不确定这是否有效，但这就是我所拥有的：
这里的每一行都有一个集合标签，一个可以滚动到数字的代表选择器，以及一个用于放置重量的文本字段。然后我将每一行保存为一个对象，用于存储集合、代表和权重。
问题是在编辑这个时，我怎样才能再次保存这些覆盖旧值？因此我上面的计划是使用 didFinishEditing 方法。
我之前的计划是下面的代码，但是我无法理解注释部分。所以我希望有人指导我在编辑时如何处理 saying 而不是这个不起作用的保存按钮功能！
func saveUserExerciseSets() {
if userExercise == nil {
print("CREATING A FRESH SET OF SETS FOR THE NEW EXERCISE")
for cell in self.customSetsTable.visibleCells as! Array<NewExerciseTableViewCell> {
print("SAVING THESE CELLS \(customSetsTable.visibleCells)")
let newUserExerciseSet = UserExerciseSet(context: self.managedObjectContext)
newUserExerciseSet.setPosition = Int64(cell.setNumber.text!)!
newUserExerciseSet.setReps = Int64(cell.repsPicker.selectedRow(inComponent: 0))
newUserExerciseSet.parentExerciseName = self.userExerciseName.text
if self.localeIdentifier == "en_GB" {
let kgWeight = Measurement(value: Double(cell.userExerciseWeight.text!)!, unit: UnitMass.kilograms)
newUserExerciseSet.setWeight = kgWeight as NSObject?
newUserExerciseSet.initialMetricSystem = self.localeIdentifier
} else if self.localeIdentifier == "en_US" {
let lbsWeight = Measurement(value: Double(cell.userExerciseWeight.text!)!, unit: UnitMass.pounds)
newUserExerciseSet.setWeight = lbsWeight as NSObject?
newUserExerciseSet.initialMetricSystem = self.localeIdentifier
}
let fetchRequest: NSFetchRequest<UserExercise> = UserExercise.fetchRequest()
fetchRequest.predicate = NSPredicate(format: "name == %@", self.exerciseNameToAddTo!)
do {
let parentExercise = try self.managedObjectContext.fetch(fetchRequest).first
parentExercise?.addToExercisesets(newUserExerciseSet)
print("SET ADDED TO EXERCISE")
} catch {
print("Fetching Routine Failed")
}
}
} else if self.userExercise != nil {
print("UPDATING EXISTING SETS FOR THE EXISTING EXERCISE")
let cells = self.customSetsTable.visibleCells as! Array<NewExerciseTableViewCell>
for cell in cells {
let exerciseSets = self.userExercise?.exercisesets?.allObjects as! [UserExerciseSet]
let sortedexerciseSets = exerciseSets.sorted { ([=10=].setPosition < .setPosition) }
let cellsSet = sortedexerciseSets //match the sortedexerciseSets set object to the cell index positions
cellsSet.setPosition = Int64(setsCell.setNumber.text!)!
cellsSet.setReps = Int64(setsCell.repsPicker.selectedRow(inComponent: 0))
if self.localeIdentifier == "en_GB" {
let kgWeight = Measurement(value: Double(cell.userExerciseWeight.text!)!, unit: UnitMass.kilograms)
cellsSet.setWeight = kgWeight as NSObject?
} else if self.localeIdentifier == "en_US" {
let lbsWeight = Measurement(value: Double(cell.userExerciseWeight.text!)!, unit: UnitMass.pounds)
cellsSet.setWeight = lbsWeight as NSObject?
}
cellsSet.parentExerciseName = self.userExerciseName.text
}
}
do {
try self.managedObjectContext.save()
print("THE SET HAS BEEN SAVED")
} catch {
fatalError("Failure to save context: \(error)")
}
delegate?.didFinishEditing()
self.dismiss(animated: true, completion: nil)
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
guard let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as? NewExerciseTableViewCell
else {
fatalError("Unexpected Index Path")
}
cell.backgroundColor = UIColor.customBackgroundGraphite()
cell.textLabel?.textColor = UIColor.white
cell.repsPicker.dataSource = self
cell.repsPicker.delegate = self
configure(cell, at: indexPath)
return cell
}
func configure(_ cell: NewExerciseTableViewCell, at indexPath: IndexPath) {
// configuring cells when theres a loaded exercise causes the issues --------------------
if self.userExercise != nil {
print("RESTORING CELLS FOR THE EXISTING EXERCISE")
let unsortedExerciseSets = self.userExercise?.exercisesets?.allObjects as! [UserExerciseSet]
let exerciseSets = unsortedExerciseSets.sorted { ([=10=].setPosition < .setPosition) }
let cellsSet = exerciseSets[indexPath.row]
cell.setNumber.text = String((indexPath.row) + 1)
let indexRow = Int(cellsSet.setReps)
print("INDEX ROW INT IS \(indexRow)")
cell.repsPicker.selectRow(indexRow, inComponent: 0, animated: true) //fix this crashing issue!
let localeIdentifier = Locale(identifier: UserDefaults.standard.object(forKey: "locale") as! String)
let setWeight = cellsSet.setWeight as! Measurement<UnitMass>
let formatter = MassFormatter()
formatter.numberFormatter.locale = localeIdentifier
formatter.numberFormatter.maximumFractionDigits = 2
if localeIdentifier.usesMetricSystem {
let kgWeight = setWeight.converted(to: .kilograms)
let finalKgWeight = formatter.string(fromValue: kgWeight.value, unit: .kilogram)
let NumericKgResult = finalKgWeight.trimmingCharacters(in: CharacterSet(charactersIn: "0123456789.").inverted)
cell.userExerciseWeight.text = NumericKgResult
} else {
let lbsWeight = setWeight.converted(to: .pounds)
let finalLbWeight = formatter.string(fromValue: lbsWeight.value, unit: .pound)
let NumericLbResult = finalLbWeight.trimmingCharacters(in: CharacterSet(charactersIn: "0123456789.").inverted)
cell.userExerciseWeight.text = NumericLbResult
}
} else if self.userExercise == nil {
print("NEW SET CELL ADDED FOR FRESH EXERCISE")
cell.setNumber.text = String((indexPath.row) + 1)
}
}
正确的方法是拥有这些集合的数组（我猜，因为你标记了核心数据，它们是 NSManagedObject 的实例？）。当用户在单元格中进行任何更改时（在文本字段中写入新值或滚动到代表的另一个值），您需要立即更新数组中的适当对象。然后，当您确定要保存更改时，您可以在 NSManagedObjectContext 上调用保存，或者只在上下文上调用回滚以取消所有更改。
尝试类似这样的操作来正确匹配 setId。这就是我认为的问题所在。
for x in sortedexerciseSets {
if x.setPosition == Int64(setsCell.setNumber.text!)! {
//save
}
}
我在我的项目中遇到了一场真正的噩梦，我需要为数组中的每个对象将单元格内容保存到一个对象中。我无法通过遍历 table 个单元格和数组对象并尝试将它们全部匹配来使它工作。
所以我的下一个想法是将 didFinishEditing 相关函数添加到 cellForRowAt 函数中？
我也不确定这是否有效，但这就是我所拥有的：
这里的每一行都有一个集合标签，一个可以滚动到数字的代表选择器，以及一个用于放置重量的文本字段。然后我将每一行保存为一个对象，用于存储集合、代表和权重。
问题是在编辑这个时，我怎样才能再次保存这些覆盖旧值？因此我上面的计划是使用 didFinishEditing 方法。
我之前的计划是下面的代码，但是我无法理解注释部分。所以我希望有人指导我在编辑时如何处理 saying 而不是这个不起作用的保存按钮功能！
func saveUserExerciseSets() {
if userExercise == nil {
print("CREATING A FRESH SET OF SETS FOR THE NEW EXERCISE")
for cell in self.customSetsTable.visibleCells as! Array<NewExerciseTableViewCell> {
print("SAVING THESE CELLS \(customSetsTable.visibleCells)")
let newUserExerciseSet = UserExerciseSet(context: self.managedObjectContext)
newUserExerciseSet.setPosition = Int64(cell.setNumber.text!)!
newUserExerciseSet.setReps = Int64(cell.repsPicker.selectedRow(inComponent: 0))
newUserExerciseSet.parentExerciseName = self.userExerciseName.text
if self.localeIdentifier == "en_GB" {
let kgWeight = Measurement(value: Double(cell.userExerciseWeight.text!)!, unit: UnitMass.kilograms)
newUserExerciseSet.setWeight = kgWeight as NSObject?
newUserExerciseSet.initialMetricSystem = self.localeIdentifier
} else if self.localeIdentifier == "en_US" {
let lbsWeight = Measurement(value: Double(cell.userExerciseWeight.text!)!, unit: UnitMass.pounds)
newUserExerciseSet.setWeight = lbsWeight as NSObject?
newUserExerciseSet.initialMetricSystem = self.localeIdentifier
}
let fetchRequest: NSFetchRequest<UserExercise> = UserExercise.fetchRequest()
fetchRequest.predicate = NSPredicate(format: "name == %@", self.exerciseNameToAddTo!)
do {
let parentExercise = try self.managedObjectContext.fetch(fetchRequest).first
parentExercise?.addToExercisesets(newUserExerciseSet)
print("SET ADDED TO EXERCISE")
} catch {
print("Fetching Routine Failed")
}
}
} else if self.userExercise != nil {
print("UPDATING EXISTING SETS FOR THE EXISTING EXERCISE")
let cells = self.customSetsTable.visibleCells as! Array<NewExerciseTableViewCell>
for cell in cells {
let exerciseSets = self.userExercise?.exercisesets?.allObjects as! [UserExerciseSet]
let sortedexerciseSets = exerciseSets.sorted { ([=10=].setPosition < .setPosition) }
let cellsSet = sortedexerciseSets //match the sortedexerciseSets set object to the cell index positions
cellsSet.setPosition = Int64(setsCell.setNumber.text!)!
cellsSet.setReps = Int64(setsCell.repsPicker.selectedRow(inComponent: 0))
if self.localeIdentifier == "en_GB" {
let kgWeight = Measurement(value: Double(cell.userExerciseWeight.text!)!, unit: UnitMass.kilograms)
cellsSet.setWeight = kgWeight as NSObject?
} else if self.localeIdentifier == "en_US" {
let lbsWeight = Measurement(value: Double(cell.userExerciseWeight.text!)!, unit: UnitMass.pounds)
cellsSet.setWeight = lbsWeight as NSObject?
}
cellsSet.parentExerciseName = self.userExerciseName.text
}
}
do {
try self.managedObjectContext.save()
print("THE SET HAS BEEN SAVED")
} catch {
fatalError("Failure to save context: \(error)")
}
delegate?.didFinishEditing()
self.dismiss(animated: true, completion: nil)
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
guard let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as? NewExerciseTableViewCell
else {
fatalError("Unexpected Index Path")
}
cell.backgroundColor = UIColor.customBackgroundGraphite()
cell.textLabel?.textColor = UIColor.white
cell.repsPicker.dataSource = self
cell.repsPicker.delegate = self
configure(cell, at: indexPath)
return cell
}
func configure(_ cell: NewExerciseTableViewCell, at indexPath: IndexPath) {
// configuring cells when theres a loaded exercise causes the issues --------------------
if self.userExercise != nil {
print("RESTORING CELLS FOR THE EXISTING EXERCISE")
let unsortedExerciseSets = self.userExercise?.exercisesets?.allObjects as! [UserExerciseSet]
let exerciseSets = unsortedExerciseSets.sorted { ([=10=].setPosition < .setPosition) }
let cellsSet = exerciseSets[indexPath.row]
cell.setNumber.text = String((indexPath.row) + 1)
let indexRow = Int(cellsSet.setReps)
print("INDEX ROW INT IS \(indexRow)")
cell.repsPicker.selectRow(indexRow, inComponent: 0, animated: true) //fix this crashing issue!
let localeIdentifier = Locale(identifier: UserDefaults.standard.object(forKey: "locale") as! String)
let setWeight = cellsSet.setWeight as! Measurement<UnitMass>
let formatter = MassFormatter()
formatter.numberFormatter.locale = localeIdentifier
formatter.numberFormatter.maximumFractionDigits = 2
if localeIdentifier.usesMetricSystem {
let kgWeight = setWeight.converted(to: .kilograms)
let finalKgWeight = formatter.string(fromValue: kgWeight.value, unit: .kilogram)
let NumericKgResult = finalKgWeight.trimmingCharacters(in: CharacterSet(charactersIn: "0123456789.").inverted)
cell.userExerciseWeight.text = NumericKgResult
} else {
let lbsWeight = setWeight.converted(to: .pounds)
let finalLbWeight = formatter.string(fromValue: lbsWeight.value, unit: .pound)
let NumericLbResult = finalLbWeight.trimmingCharacters(in: CharacterSet(charactersIn: "0123456789.").inverted)
cell.userExerciseWeight.text = NumericLbResult
}
} else if self.userExercise == nil {
print("NEW SET CELL ADDED FOR FRESH EXERCISE")
cell.setNumber.text = String((indexPath.row) + 1)
}
}
正确的方法是拥有这些集合的数组（我猜，因为你标记了核心数据，它们是 NSManagedObject 的实例？）。当用户在单元格中进行任何更改时（在文本字段中写入新值或滚动到代表的另一个值），您需要立即更新数组中的适当对象。然后，当您确定要保存更改时，您可以在 NSManagedObjectContext 上调用保存，或者只在上下文上调用回滚以取消所有更改。
尝试类似这样的操作来正确匹配 setId。这就是我认为的问题所在。
for x in sortedexerciseSets {
if x.setPosition == Int64(setsCell.setNumber.text!)! {
//save
}
}