Question

我有4个uitextfields，可以识别它们是空的还是完整的。如果完成，则将其返回键类型更改为GO，否则为默认值。问题是键盘没有改变键类型，即使我使用reloadinputview

- (void)viewDidLoad
{
    [super viewDidLoad];

    _fieldsArray = @[_nameField, _passwordField, _emailField, _usernameField];
}

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{

    NSRange textFieldRange = NSMakeRange(0, [textField.text length]);

    //NSLog(@"%d", !(NSEqualRanges(range, textFieldRange) && [string length] == 0));

    [self signUpFieldsAreValid:(!(NSEqualRanges(range, textFieldRange) && [string length] == 0) && [self validateSignUpFields:textField])];
    [textField reloadInputViews];
    return YES;
}
- (BOOL)textFieldShouldClear:(UITextField *)textField{

    [self signUpFieldsAreValid:NO];
    [textField reloadInputViews];
    return YES;
}

- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
    for (UITextField *aTextField in _fieldsArray) {
        if (aTextField.isFirstResponder) {

            aTextField.layer.borderWidth = 0.f;
            aTextField.layer.borderColor = nil;

        }
    }

    textField.layer.borderWidth = 1.f;
    textField.layer.borderColor = [UIColor colorWithRed:200.f/255.f green:0.f/255.f blue:4.f/255.f alpha:1.f].CGColor;

    return YES;
}

- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
    NSUInteger fieldIndex = [_fieldsArray indexOfObject:textField];

    [_fieldsArray[(fieldIndex + 1) % 4] becomeFirstResponder];

    return YES;
}

- (BOOL)validateSignUpFields:(UITextField *)firstResponder
{
    for (UITextField *aTextField in _fieldsArray) {
        if (!aTextField.text.length && ![aTextField isEqual:firstResponder]) {
            return NO;
        }
    }

    return YES;
}

- (void)signUpFieldsAreValid:(BOOL)valid
{
    NSLog(@"%d", valid);
    for (UITextField *aTextField in _fieldsArray) {

        if (valid) {
            aTextField.returnKeyType = UIReturnKeyGo;
        }
        else {
            aTextField.returnKeyType = UIReturnKeyDefault;
        }
    }
}

Answer 1

我在更改returnKeyType后使用了以下内容，它似乎在iOS7和iOS6.1中运行良好：

if ([self.textfieldOne isFirstResponder]) {
    [self.textfieldOne reloadInputViews];

}

Answer 2

试试这个。

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string;
{
    NSString *newStr=[textField.text stringByReplacingCharactersInRange:range withString:string];
    if([newStr length] > 0)
    {
        textField.returnKeyType = UIReturnKeySearch;
    }
    else
    {
        textField.returnKeyType = UIReturnKeyDefault;
    }
    [textField resignFirstResponder];
    [textField becomeFirstResponder];
    return YES;
}

Answer 3

根据文档，reloadInputViews仅影响自定义输入视图，而不影响标准键盘。

我为解决此问题所做的工作是致电resignFirstResponder，然后致电becomeFirstResponder。这将在没有任何动画的情况下更新键盘：

而不是：

[textFiled reloadInputViews];

做的：

[textField resignFirstResponder];
[textField becomeFirstResponder];

Answer 4

在 Swift 5 中

 // Change returnKeyType based on textField text
func textFieldDidChangeSelection(_ textField: UITextField) {
    // Change return key to Done when text entered
    if textField.text != "" {
        textField.returnKeyType = .done
        textField.reloadInputViews()
    }
    // Change back to default style if all text removed
    else {
        textField.returnKeyType = .default
        textField.reloadInputViews()
    }

Answer 5

我在更改returnKeyType后使用了以下内容，它似乎在iOS7和iOS6.1中运行良好：

if ([self.textfieldOne isFirstResponder]) {
    [self.textfieldOne reloadInputViews];

}

编辑时更改uitextfield返回键类型

5 个答案: