在键盘后面处理UITextField的2个问题

时间:2013-07-11 00:45:55

标签: ios uitableview keyboard scroll uitextfield

在我的视图中,我的UITableViewCell中有一个UITextField。现在有可能UITextField可以在我的键盘后面,所以我使用以下两种方法正确处理它。一个用于点击键盘,另一个用于解除键盘时:

- (void)keyboardNotification:(NSNotification*)notification {
    CGSize keyboardSize = [[[notification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
    CustomCell *cell = (CustomCell*)[[tempTextField superview] superview];
    CGRect textFieldRect = [cell convertRect:tempTextField.frame toView:self.view];
    if (textFieldRect.origin.y + textFieldRect.size.height >= [UIScreen mainScreen].bounds.size.height - keyboardSize.height) {
        thetableView.contentInset =  UIEdgeInsetsMake(0, 0, keyboardSize.height, 0);
        NSIndexPath *pathOfTheCell = [thetableView indexPathForCell:cell];
        [thetableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:pathOfTheCell.row inSection:0] atScrollPosition:UITableViewScrollPositionTop animated:YES];
    }

}

- (void)keyboardhideNotification:(NSNotification*)notification {
    thetableView.contentInset =  UIEdgeInsetsMake(0, 0, 0, 0);
}

现在它运作得有点好,但有两个问题。

  1. 如果整个UITextField位于键盘顶部以下,则tableview仅滚动到键盘上方。如果键盘位于正在选择的UITextField的一半,则tableview将不会滚动到键盘上方。从快速浏览一下,看起来这应该可行,但我可能会遗漏一些东西。
  2. 2 。当键盘位于键盘下方并且桌面视图向上滚动时,它会以一种漂亮的动画方式进行,但是当我点击完成时它会立即弹回到旧位置。我可以清楚地看到为什么会发生这种情况,但是如何让好的动画恢复到tableview所处的旧位置呢?

    非常感谢任何输入!

    更新:我设法找到#1的问题。这是一个愚蠢的错误。应该已将textField的高度添加到原点,因为该测量值正在向下。现在进入#2 ......

1 个答案:

答案 0 :(得分:0)

此代码只修复了1和2:

- (void)keyboardNotification:(NSNotification*)notification {
    CGSize keyboardSize = [[[notification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
    CustomCell *cell = (CustomCell*)[[tempTextField superview] superview];
    CGRect textFieldRect = [tempTextField convertRect:tempTextField.frame toView:self.view];
    if (textFieldRect.origin.y + textFieldRect.size.height >= [UIScreen mainScreen].bounds.size.height - keyboardSize.height) {
        NSDictionary *info = [notification userInfo];
        NSNumber *number = [info objectForKey:UIKeyboardAnimationDurationUserInfoKey];
        double duration = [number doubleValue];
        [UIView animateWithDuration:duration animations:^{
            thetableView.contentInset =  UIEdgeInsetsMake(0, 0, keyboardSize.height, 0);
        }];
        NSIndexPath *pathOfTheCell = [thetableView indexPathForCell:cell];
        [thetableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:pathOfTheCell.row inSection:0] atScrollPosition:UITableViewScrollPositionMiddle animated:YES];
    }

}

- (void)keyboardhideNotification:(NSNotification*)notification {
    NSDictionary *info = [notification userInfo];
    NSNumber *number = [info objectForKey:UIKeyboardAnimationDurationUserInfoKey];
    double duration = [number doubleValue];
    [UIView animateWithDuration:duration animations:^{
        thetableView.contentInset =  UIEdgeInsetsMake(0, 0, 0, 0);
    }];
}