Question

我有UITableView，我是通过自定义UIViewController控制的。当用户点击“添加”按钮时，我会在UITableView中添加一行，其中包含文本字段，并将其作为第一个响应者。问题是，当表格底部不在视野范围内（或被键盘隐藏）时，UITableView不会滚动以显示文本字段。

UITableViewController会自动执行此操作，但我的视图控制器不能是UITableViewController的子类。

Answer 1

我通过在键盘出现或消失时contentInset上UITableView来修复此问题。

- (void)registerForKeyboardNotifications {
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWasShown:)
                                                 name:UIKeyboardDidShowNotification object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWasHidden:)
                                                 name:UIKeyboardDidHideNotification object:nil];
}

- (void)keyboardWasShown:(NSNotification *)aNotification {
    CGRect keyboardBounds;
    [[aNotification.userInfo valueForKey:UIKeyboardBoundsUserInfoKey] getValue: &keyboardBounds];
    keyboardHeight = keyboardBounds.size.height;
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationBeginsFromCurrentState:YES];
    tableView.contentInset = UIEdgeInsetsMake(0, 0, keyboardBounds.size.height, 0);
    [UIView commitAnimations];
    [tableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:[items count] inSection:0]
                     atScrollPosition:UITableViewScrollPositionMiddle
                             animated:YES];
}

- (void)keyboardWasHidden:(NSNotification *)aNotification {
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationBeginsFromCurrentState:YES];
    tableView.contentInset = UIEdgeInsetsZero;
    [UIView commitAnimations];
}

在您加载registerForKeyboardNotifications时致电UITableView，其他一切都应该正常工作。

Answer 2

我找到-scrollToRowAtIndexPath:atScrollPosition:animated:并猜测这会做你想要的。

Answer 3

我遇到了类似的问题，这是我的问题：http://www.passiondeveloper.com/discussion/8/uitableview-inline-editing-with-a-textfield-inside-uitableview-not-scrolling-when-keyboard-is-shown

Answer 4

为ios5工作

UITextField *activeField;

// Called when the UIKeyboardDidShowNotification is sent.

-(void)textFieldDidBeginEditing:(UITextField *)textField
{
   activeField = textField;
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
   activeField = nil;
}

// Called when the UIKeyboardWillHideNotification is sent

- (void)keyboardWasShown:(NSNotification *)aNotification {


   id view = [activeField superview];
   while (view && ![view isKindOfClass:[UITableViewCell class]]) 
   {
      view = [view superview];
   }
   UITableViewCell *cell = view;
   NSIndexPath *indexPath = [tableview indexPathForCell:cell];
   CGRect keyboardBounds;
   [[aNotification.userInfo valueForKey:UIKeyboardBoundsUserInfoKey] getValue: &keyboardBounds];
   [UIView beginAnimations:nil context:nil];
   [UIView setAnimationBeginsFromCurrentState:YES];
   tableview.contentInset = UIEdgeInsetsMake(0, 0, keyboardBounds.size.height, 0);
   [UIView commitAnimations];
   [tableview scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionTop animated:YES];

}

- (void)keyboardWasHidden:(NSNotification *)aNotification {
   [UIView beginAnimations:nil context:nil];
   [UIView setAnimationBeginsFromCurrentState:YES];
    tableview.contentInset = UIEdgeInsetsZero;
   [UIView commitAnimations];
}

如何让自定义UITableView自动滚动到选定的文本字段？

4 个答案: