UITextView textview应该终止它从未调用 [英] UITextView textviewshouldendediting never called

问题描述

我有这样的UITextView设置:

I have a UITextView setup like this:

    UITextView *textView = [[UITextView alloc] initWithFrame:CGRectMake(10, 40, 280, 240)];
    [textView setBackgroundColor:[UIColor greenColor]];
    [textView setFont:[UIFont fontWithName:@"MyriadPro-Regular" size:13]];
    [textView setTextColor:[UIColor blackColor]];
    [textView setText:@"Your Message...."];
    [textView setBackgroundColor:[UIColor clearColor]];
    [textView setDelegate:self];
    [textView setReturnKeyType:UIReturnKeyDone];

我希望当用户按下键盘上的完成"按钮时，将调用此方法(已实现):

I am expecting that when the user pressed the "Done" button on keyboard, this method will be invoked (which I have implemented):

- (BOOL)textViewShouldEndEditing:(UITextView *)textView {
    NSLog(@"called");
    [textView resignFirstResponder];
    return YES;
}

但是这种方法永远不会被调用.我在做什么错?谢谢.

But this method never get's called..What am I doing wrong? Thanks.

推荐答案

设置返回键类型时，它不会改变文本视图的行为.在 Return 上，它将在文本视图中添加换行符.因此，如果您不希望文本视图为多行，则可以捕获 \ n 和 resignFirstResponder .

While you set the return key type, it doesn't alter text view's behavior. On Return, it will add a newline to the text view. So if you don't want your text view to be multiline, you can capture the \n and resignFirstResponder.

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
    if ( [text isEqualToString:@"\n"] ) {
        [textView resignFirstResponder];
    }

    return YES;
}

在旁注中， textViewShouldEndEditing:在您退出第一响应者状态后被调用.

On a side note, textViewShouldEndEditing: is called after you resign your first responder status.

如果要在文本视图中保留换行符，则应考虑使用 此处 .

If you want to retain newline characters in your text view, you should consider using the inputAccessoryView of the text view. An example for that is here.

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