Ios UITextField变为第一个报告不工作并返回false
我的代码中有3个文本字段,如下所示:Ios UITextField变为第一个报告不工作并返回false,ios,swift,uitextfield,becomefirstresponder,Ios,Swift,Uitextfield,Becomefirstresponder,我的代码中有3个文本字段,如下所示: @IBOutlet var oldPasswordTextField: UITextField! { didSet { oldPasswordTextField.delegate = self } } @IBOutlet var newPasswordTextField: UITextField! { didSet { newPasswordTextField.delegate = self } } @IBOutlet var confirmPass
@IBOutlet var oldPasswordTextField: UITextField! { didSet { oldPasswordTextField.delegate = self } }
@IBOutlet var newPasswordTextField: UITextField! { didSet { newPasswordTextField.delegate = self } }
@IBOutlet var confirmPasswordTextField: UITextField! { didSet { confirmPasswordTextField.delegate = self } }
func textFieldShouldReturn(textField: UITextField) -> Bool { //delegate method
textField.resignFirstResponder()
if textField == oldPasswordTextField
{
newPasswordTextField.becomeFirstResponder()
}
else if textField == newPasswordTextField
{
confirmPasswordTextField.becomeFirstResponder()
}
else
{
saveButtonTapped()
}
return true
}
在我的textFieldShouldReturn委托方法中,我希望在单击return时将下一个textfield作为第一个响应者,如下所示:
@IBOutlet var oldPasswordTextField: UITextField! { didSet { oldPasswordTextField.delegate = self } }
@IBOutlet var newPasswordTextField: UITextField! { didSet { newPasswordTextField.delegate = self } }
@IBOutlet var confirmPasswordTextField: UITextField! { didSet { confirmPasswordTextField.delegate = self } }
func textFieldShouldReturn(textField: UITextField) -> Bool { //delegate method
textField.resignFirstResponder()
if textField == oldPasswordTextField
{
newPasswordTextField.becomeFirstResponder()
}
else if textField == newPasswordTextField
{
confirmPasswordTextField.becomeFirstResponder()
}
else
{
saveButtonTapped()
}
return true
}
但它不起作用。所以我试着检查出了什么问题。所以我试了一下:
func textFieldShouldReturn(textField: UITextField) -> Bool { //delegate method
if textField.canResignFirstResponder()
{
print("textField can resign first responder")
if textField.resignFirstResponder() == true
{
print("textField resigned first responder")
}
else
{
print("textField didnt resign first responder")
}
}
else
{
print("textField cant resign first responder")
}
if textField == oldPasswordTextField
{
if newPasswordTextField.canBecomeFirstResponder() == true
{
if newPasswordTextField.becomeFirstResponder() == true
{
print("newPassword field has become first responder")
}
else
{
print("newPassword field cannot become first responder")
}
}
}
else if textField == newPasswordTextField
{
confirmPasswordTextField.becomeFirstResponder()
}
else
{
saveButtonTapped()
}
return true
}
加班后我得到“textField不能辞职第一响应者”
“newPassword字段不能成为第一响应者”
在我的控制台上。我不知道这里出了什么问题。为什么canResignFirstResponder()方法和becomeFirstResponder()方法返回false?有什么帮助吗?尝试在文本字段中使用标记。这对我很有用:
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
NSInteger nextTag = textField.tag + 1;
// Try to find next responder
UIResponder* nextResponder = [textField.superview viewWithTag:nextTag];
if (nextResponder) {
// Found next responder, so set it.
[nextResponder becomeFirstResponder];
} else {
// Not found, so remove keyboard.
[textField resignFirstResponder];
}
return NO; // We do not want UITextField to insert line-breaks.
}
抱歉,我没有看到它不是Objective-C,在swift中它将是:
func textFieldShouldReturn(textField: UITextField!) -> Bool {
let nextTag:Int = textField.tag + 1
// Try to find next responder
if let nextResponder: UIResponder! = textField.superview!.viewWithTag(nextTag){
nextResponder.becomeFirstResponder()
} else {
// Not found, so remove keyboard.
textField.resignFirstResponder()
}
return false; // We do not want UITextField to insert line-breaks.
}
我在这里找到了解决方案:明白了。上面的代码很好。我的代码中的错误是,我的“textFieldShouldEndEditing”方法返回false,这就是为什么我的resignFirstResponder方法返回false,并且它不工作的原因。 因此,我使“textFieldShouldEndEditing”方法返回true,并且工作正常
似乎没什么问题,同样的代码对我来说很好,明白了。我的代码中的错误是,我的“textFieldShouldEndEditing”方法返回false,这就是为什么我的resignFirstResponder方法返回false,并且它不工作的原因。因此,我将该返回设置为真,效果良好。:)不工作:(nextResponder.becomeFirstResponder()为false