Question

以下是我的代码：

- (void)viewDidLoad {
    [super viewDidLoad];

    // passwordTextField cannot get focus after click next key due to this RAC
    RAC(self.loginButton, enabled) = [RACSignal combineLatest:@[self.userTextField.rac_textSignal,
                                                                self.passwordTextField.rac_textSignal]
                                                       reduce:^id (NSString *user, NSString *password) {
                                                           if ([user length] > 0 && [password length] > 0) {
                                                               return @YES;
                                                           }
                                                           return @NO;
                                                       }];
}

- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
    if (textField == self.userTextField) {
        [self.passwordTextField becomeFirstResponder];
    } else {
        [self loginAction:textField];
    }
    // passwordTextField cannot get focus after click next key due to returning YES
    return YES;
}

- (void)loginAction:(id)sender
{
    [self.userTextField resignFirstResponder];
    [self.passwordTextField resignFirstResponder];
    // some login actions
}

我想在userTextField中单击return键时将焦点移到passwordTextField。但是passwordTextField获得焦点然后立即失去焦点。我创建了UITextField的子类并尝试找到原因。我发现如果我在函数textFieldShouldReturn中返回YES，则passwordTextField将获得insertText调用。然后passwordTextField将立即收到resignFirstResponder电话。我现在还不知道为什么我们必须在函数textFieldShouldReturn中返回NO 。任何人都可以帮助我吗？

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添加更多信息：

我发现只有在我使用ReactiveCocoa时才会出现此问题。 ReactiveCocoa的版本是2.5。

Answer 1

只需设置标记您的文本字段并输入此代码

- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
    NSInteger nextTag = textField.tag + 1;
    // Try to find next responder
    UIResponder* nextResponder = [textField.superview viewWithTag:nextTag];
    if (textField.tag == 0) {
        // Found next responder, so set it.
        [nextResponder becomeFirstResponder];
    } else {
        // Not found, so remove keyboard.
        [textField resignFirstResponder];
    }
    return NO;
}

我希望这会对你有所帮助。

如果您喜欢我的答案，请接受并提出我的答案

Answer 2

- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
   NSUInteger index = textField.tag;
   if (index == 1 || textField == self.passwordTextField) 
   { 
      [textField resignFirstResponder];
   }
   else
   {
      [textField becomeFirstResponder];
   }
   return NO;
}

由于textFieldShouldReturn中返回YES，UITextField会立即获得焦点，然后立即失去焦点

2 个答案: