Question

我正在调试其他人的代码 - 抱歉，我的Objective-C体验非常有限。

#pragma mark - Keyboard events

- (void)keyboardWasShown:(NSNotification*)aNotification
{
    NSDictionary* info = [aNotification userInfo];
    CGSize kbSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;
    NSLog(@"Keyboard a Notification user Info %@", info);

    printf("keyboardWasShown \\\\\\\\\\\\\\\\\\\\\n");
    NSLog(@"textInputView: y: (%.f), height: (%.f), kbHeight: (%.f)",
        textInputView.frame.origin.y, textInputView.frame.size.height, kbSize.height);

    [UIView animateWithDuration:2.0f animations:^{
        if (keyboardNewLine){
            bubbleTableFrame = originalBubbleTableFrame;
        }
        CGRect frame = originalTextViewFrame;
        int difference = 0;

        if (IsIphone5){
                difference = -42;
                frame.origin.y -= kbSize.height + difference;

        } else {
            if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0f) {
                difference = 42;
                frame.origin.y -= kbSize.height + difference;
            } else {
                frame.origin.y -= kbSize.height + 110;
                difference = 42;
            }
        }
        textInputView.frame = frame;

        frame = bubbleTableFrame;
        frame.size.height -= kbSize.height + difference;
        bubbleTable.frame = frame;
    }];

    NSLog(@"textInputView: y: (%.f), height: (%.f), kbHeight: (%.f)",
          textInputView.frame.origin.y, textInputView.frame.size.height, kbSize.height);
    printf("keyboardWasShown //////////\n");

    [bubbleTable scrollBubbleViewToBottomAnimated:YES];
}

当我点击文本输入字段以调出键盘时，字段应该向上移动到键盘上方 - 有时。这一切都取决于首先加载哪个键盘。