swift 多个 UITextField EditingDidEnd 导致应用程序崩溃

Question

每次我在文本字段中输入文本后，我的应用程序都会崩溃。我试图在输入文本后保存它，并尝试触摸另一个文本字段进行编辑，但它只是卡住了。我正在尝试使用 textFieldDidEndEditing 或 EditingDidEnd 作为文本字段。任何帮助将非常感激。这是我的发言。

//MARK: Text selected field delegate
extension ExerciseViewController: UITextFieldDelegate{
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
    var currentTextField = textFields[0]
    if (currentTextField == textField) {

        currentTextField = textFields[1]

        currentTextField.becomeFirstResponder()
    }
    return true
}
func  textFieldDidBeginEditing(_ textField: UITextField) {
    print("User is editing text field")
}
func textFieldDidEndEditing(_ textField: UITextField, reason: UITextFieldDidEndEditingReason) {
    let exercise = Exercise(context: context)
    let client = Client(context: context)
    exercise.reps = Int16(todayRepsTextField.text!)!
    exercise.weight = Float(todayWeightTextField.text!)!
    exercise.notes = todayNotesTextView.text
    exercise.seat = Int16(seatPositionTextField.text!)!
    exercise.nextWeight = Float(nextWeightTextField.text!)!
    client.goals = goalsTextField.text
    client.intensity = intensityTextField.text
    client.medical = medicalTextField.text
    client.notes = clientNotesTextField.text
    exercise.exerciseInfo?.exerciseProtocol?.protocolName = protocolTextField.text
    thisAppDelegate().saveContext()
}

}

Answer 1

尽量不要使用 ! 进行转换，它可能会使应用程序崩溃。这是使用可选值的快速修复，但未经测试。

let exercise = Exercise(context: context)
exercise.reps = Int16(todayRepsTextField.text ?? "0") ?? 0
exercise.weight = Float(todayWeightTextField.text ?? "0") ?? 0
exercise.notes = todayNotesTextView.text
exercise.seat = Int16(seatPositionTextField.text ?? "0") ?? 0
exercise.nextWeight = Float(nextWeightTextField.text ?? "0") ?? 0
    
let client = Client(context: context)
client.goals = goalsTextField.text
client.intensity = intensityTextField.text
client.medical = medicalTextField.text
client.notes = clientNotesTextField.text
    
exercise.exerciseInfo?.exerciseProtocol?.protocolName = protocolTextField.text
thisAppDelegate().saveContext()