iphone - UITextView : Text starts from 2nd line of text view

Question

我有一个奇怪的问题。我有 3 个 UITextField 和 1 个 UITextView。我可以通过以下方式从一个 UITextField 移动到下一个 UITextField:

- (BOOL) textFieldShouldReturn:(UITextField *)textField
{
    NSInteger nextTag = textField.tag + 1;
    //-- try to find next responde
    UIResponder* nextResponder = [textField.superview viewWithTag:nextTag];

    if (nextResponder) 
    {
        //-- found next responce ,so set it
        [nextResponder becomeFirstResponder];
    }
    else
    {
        [scrollView setContentOffset:CGPointMake(0, 0) animated:YES];
        //-- not found remove keyboard
        [textField resignFirstResponder];
        return YES;
    }   

    return YES;
}

一切正常，直到到达 UITexView，然后我的光标移动到 TextView 的第二行，而不是 TextView 的第一行。

TextView 取自IB。

TextView 的代码:

- (void) textViewDidBeginEditing:(UITextView *)textView
{
    optionalText.hidden = YES ;
    [scrollView setContentOffset:CGPointMake(0, textView.center.y-100) animated:YES];
}

- (BOOL) textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{       
    // Any new character added is passed in as the "text" parameter
    if ([text isEqualToString:@"\n"])
    {
        // Be sure to test for equality using the "isEqualToString" message
        [textView resignFirstResponder];
        [scrollView setContentOffset:CGPointMake(0, 0) animated:YES];

        // Return FALSE so that the final '\n' character doesn't get added      
        if ([[commentTxtView.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] length] == 0)
        {
            optionalText.hidden = NO ;
            NSLog(@"Text View is null");
            [scrollView setContentOffset:CGPointMake(0, 0) animated:YES];
        }

        return FALSE;
    }

    return TRUE;
}

看起来像这样:

可能是什么问题？为什么它不从 TextView 的第一行开始？

Answer 1

我敢打赌，如果 nextResponder 是您的 UITextField，您的 textFieldShouldReturn: 应该返回 NO。现在您总是返回 YES，这意味着 key 可能会传递给 UITextView，然后插入新行。