ios - 键盘关闭时 ScrollView 不向下滚动

Question

我使用了关于移动键盘下方内容的苹果指南

Guide here

当键盘打开时向上滚动效果很好，但当键盘关闭时它不会向下滚动， ScrollView 的顶部被截断。

我的代码

// Called when the UIKeyboardDidShowNotification is sent.
 - (void)keyboardWasShown:(NSNotification*)aNotification
{
    NSDictionary* info = [aNotification userInfo];
    CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;

    UIEdgeInsets contentInsets = UIEdgeInsetsMake(0.0, 0.0, kbSize.height, 0.0);
    _myScrollView.contentInset = contentInsets;
    _myScrollView.scrollIndicatorInsets = contentInsets;

    // If active text field is hidden by keyboard, scroll it so it's visible
    // Your app might not need or want this behavior.
    CGRect aRect = self.view.frame;
    aRect.size.height -= kbSize.height;
    if (!CGRectContainsPoint(aRect, activeField.frame.origin) ) {
        [self.myScrollView scrollRectToVisible:activeField.frame animated:YES];
    } 
}

// Called when the UIKeyboardWillHideNotification is sent
- (void)keyboardWillBeHidden:(NSNotification*)aNotification
{
    UIEdgeInsets contentInsets = UIEdgeInsetsZero;
    _myScrollView.contentInset = contentInsets;
    _myScrollView.scrollIndicatorInsets = contentInsets;
}

Answer 1

这是我在键盘退出时使用的代码。我在使用您的原始代码时遇到了麻烦，因为它似乎不想在 iOS 7 中工作。

-(void) keyboardWillHide:(NSNotification *)note
{
    // Get the keyboard size
    CGRect keyboardBounds;
    [[note.userInfo valueForKey:UIKeyboardFrameBeginUserInfoKey] getValue: &keyboardBounds];

    CGRect frame = self.scrollView.frame;

    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationBeginsFromCurrentState:YES];
    [UIView setAnimationDuration:0.3f];

    //add keyboard size to current scrollview frame
    frame.size.height += keyboardBounds.size.height;

    //apply frame to scrollview
    self.scrollView.frame = frame;

    [UIView commitAnimations];
}