Question

我的UIViewController包含UITableView个自定义单元格，单元格内部为UILabels，有两个不可编辑的UITextView和一个可编辑的UITextView 。现在，当我点击桌子底部或底部附近的UITextView之一时，键盘会覆盖UITextView。我已经尝试了http://cocoawithlove.com/2008/10/sliding-uitextfields-around-to-avoid.html，这对于textfield / textview很有用，但是没有使用自定义单元格在桌面上工作。有任何帮助或建议如何解决这个问题？

Answer 1

两种解决方案：

首选：使用UITableViewController而不是UIViewController，因为它会自动确保您的键盘不会隐藏可编辑字段。

Hacky ：How to make a UITextField move up when keyboard is present?

Answer 2

一个简单的解决方案。实现heightForFooter方法，让它返回（比方说）100的值，当您在UITableView中选择一个单元格时，它们只会向上滑动该高度，键盘将无法覆盖风景。

Answer 3

我总是使用双折解决方案。

调整表格大小，使其适合较小的区域。
滚动到我们想要的单元格。（我们需要为此重新调整表格大小，否则你仍然无法进入表格中的最后几个单元格。）

要做到这一点，我会注册键盘显示/隐藏事件，并在被调用时采取相应的行动。

- (void)keyboardWillShow:(NSNotification *)note {
    [self updateForKeyboardShowHide:note appearing:YES];
}
- (void)keyboardWillHide:(NSNotification *)note {
    [self updateForKeyboardShowHide:note appearing:NO];
}

- (void)updateForKeyboardShowHide:(NSNotification *)note appearing:(BOOL)isAppearing {
    // ignore notifications if our view isn't attached to the window
    if (self.view.window == nil)
        return;

    CGFloat directionalModifier = isAppearing?-1:1;
    CGRect keyboardBounds = [[note.userInfo valueForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue];
    CGFloat animationDuration = [[note.userInfo valueForKey:UIKeyboardAnimationDurationUserInfoKey] floatValue];

    // figure out table re-size based on keyboard
    CGFloat keyboardHeight;
    UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
    if (UIInterfaceOrientationIsPortrait(orientation))
        keyboardHeight = keyboardBounds.size.height;
    else 
        keyboardHeight = keyboardBounds.size.width;

    [UIView animateWithDuration:animationDuration animations:^{
        // resize table
        CGRect newFrame = table.frame;
        newFrame.size.height += [self calculateKeyboardOffsetWithHeight:keyboardHeight] * directionalModifier;
        table.frame = newFrame;        
    }  completion:^(BOOL finished){
        // scroll to selected cell
        if (isAppearing) {
            NSIndexPath *indexPath = [NSIndexPath indexPathForRow:textFieldInEdit.tag inSection:0];
            [table scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionBottom animated:YES];
        }
    }];
}

- (CGFloat)calulateKeyboardOffsetWithHeight:(CGFloat)keyboardHeight {
    // This depends on the size and position of your table.
    //   If your table happen to go all the way to the bottom of
    // the screen, you'll needs to adjust it's size by the whole keyboard height.
    // You might as well ditch this method and inline the value.
    return keyboardHeight;

    //   My table did not go to the bottom of the screen and the position was
    // change dynamically so and there was long boring calculation I needed to
    // do to figure out how much my table needed to shrink/grow.
}

Answer 4

当您的表格视图包含UITextField或UITextView等数据输入字段且表格视图足以覆盖屏幕时，您将无法访问被隐藏的数据输入字段键盘。
为了克服这个问题，有两种解决方案：

最简单且推荐的方法是使用UITableViewController代替UIViewController，这会自动确保键盘不会隐藏可编辑字段（如果可能，请使用此方法避免UI调整不便）

如果您使用UIViewController和UITableView作为其子视图。您可以通过观察UIKeyboardWillShowNotification和UIKeyboardWillHideNotification

来滚动UI的框架

- (void)registerForKeyboardNotifications 
{
        [[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(keyboardWillShow:)
                                                     name:UIKeyboardWillShowNotification object:nil]; //Posted immediately prior to the display of the keyboard

        [[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(keyboardWillHide:)
                                                     name:UIKeyboardWillHideNotification object:nil]; //Posted immediately prior to the dismissal of the keyboard.
}


- (void)keyboardWillShow:(NSNotification *)aNotification 
{  
    CGRect keyboardBounds = [[[aNotification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue];

    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationBeginsFromCurrentState:YES];

    self.tableView.contentInset = UIEdgeInsetsMake(0, 0, keyboardBounds.size.height, 0); //when keyboard is up, that time just bring your text filed above the keyboard
    self.tableView.scrollIndicatorInsets = UIEdgeInsetsMake(0, 0, keyboardBounds.size.height, 0);

    [self.tableView scrollToRowAtIndexPath:[self findIndexPathToScroll]
                          atScrollPosition:UITableViewScrollPositionTop
                                  animated:YES]; //findIndexPathToScroll implementation not shown
    [UIView commitAnimations];
}

- (void)keyboardWillHide:(NSNotification *)aNotification 
{
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationBeginsFromCurrentState:YES];
    self.tableView.contentInset = UIEdgeInsetsZero; //Once keyboard is hidden then bring back your table into your original position.
    self.tableView.scrollIndicatorInsets = UIEdgeInsetsZero;
    [UIView commitAnimations];
}

registerForKeyboardNotifications - 加载UITableView时调用此方法，即：viewDidLoad
findIndexPathToScroll - （实现未显示）它是您的业务逻辑，用于准备表视图应滚动的IndexPath
removeObserver'{1}}和dealloc

从具有自定义单元格的UITableView中的UITextView打开键盘时，请避免查看

5 个答案: