ios - UITextview 键盘不允许按 "send"按钮

Question

我开始编写类似于聊天应用程序的程序，在此期间我遇到了这个小问题:我开始实现一个 Textview(供用户编写消息)，效果很好。如果我按下 Textview，键盘就会出现，我可以写一些文本。如果用户想要发送消息，可以按下该按钮，该按钮位于 View 中。因此，如果我按下此按钮，键盘首先会淡出，并且不会发送任何消息。所以按钮的 Action 不会被调用。我希望发送按钮能够工作，即使在显示键盘时也是如此。所以如果我按下发送按钮，键盘应该向下滚动，消息应该发送到服务器。也许有人知道线索，为什么会这样。

谢谢，托拜厄斯

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- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

    UITouch *touch = [[event allTouches] anyObject];
    if ([messagesend isFirstResponder] && [touch view] != messagesend) {
        [messagesend resignFirstResponder];
    }
    [super touchesBegan:touches withEvent:event];
}

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{

    if([text isEqualToString:@"\n"]){
            [textView resignFirstResponder];
            textView.contentOffset = CGPointMake(0.0, textView.contentSize.height-textView.frame.size.height);

        }
    return YES;
}

- (void) keyboardDidShow:(NSNotification *)note {
    NSDictionary *userInfo = [note userInfo];
    CGSize kbSize = [[userInfo objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;

    CGRect frame = messagesendview.frame;
    frame.origin.y = frame.origin.y-(kbSize.height);

    CGRect frame1 = _myTableView.frame;
    frame1.size.height = frame1.size.height-(kbSize.height);

    NSNumber *durationValue = userInfo[UIKeyboardAnimationDurationUserInfoKey];
    NSTimeInterval animationDuration = durationValue.doubleValue;


    [UIView animateWithDuration:animationDuration animations:^{
        messagesendview.frame = frame;
        _myTableView.frame = frame1;
    }];

    if (_myTableView.contentSize.height > _myTableView.frame.size.height)
    {
        CGPoint offset = CGPointMake(0, _myTableView.contentSize.height - _myTableView.frame.size.height);
        [self.myTableView setContentOffset:offset animated:YES];
    }
}

- (void)keyboardDidHide:(NSNotification *)note
{

    NSDictionary *userInfo = [note userInfo];
    CGSize kbSize = [[userInfo objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;

    CGRect frame = messagesendview.frame;
    frame.origin.y = frame.origin.y+(kbSize.height);

    NSNumber *durationValue = userInfo[UIKeyboardAnimationDurationUserInfoKey];
    NSTimeInterval animationDuration = durationValue.doubleValue;

    CGRect frame1 = _myTableView.frame;
    frame1.size.height = frame1.size.height+(kbSize.height);


    [UIView animateWithDuration:animationDuration animations:^{
        messagesendview.frame = frame;
        _myTableView.frame = frame1;
    }];

}
- (IBAction)send:(id)sender {
    [messagesend resignFirstResponder];
    [self sendmessage];
    }

我认为我的问题出在 touchesBegan 方法中。基本上我试图识别用户何时在消息发送(TextView)之外按下。但是“发送”按钮也在外面......

Answer 1

- (BOOL) textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
    if([text isEqualToString:@"\n"]){
        [textView resignFirstResponder];
        //Here u can call your "send message" method
        return NO;
    }else{
        return YES;
    }
}

或者:

- (IBAction)yourSendButton:(id)sender {
    [self.yourTextView resignFirstResponder];
    [self sendMessage:self.yourTextView.text];
    self.yourTextView.text = @"";
}