使用 AQGridView 滚动到选定的文本字段（类似于 tableView）

Question

我正在尝试创建一个简单的笔记块应用程序。我正在使用 AQGridView 在网格中显示注释块。每个注释块在 AQGridViewCell 的自定义子类中都有一个可编辑的 UITextField 属性（类似于 TableViewCell）。我在键盘处理方面遇到了一些问题。我尝试遵循本指南， http://developer.apple.com/library/ios/#documentation/StringsTextFonts/Conceptual/TextAndWebiPhoneOS/KeyboardManagement/KeyboardManagement.html。我已经实现了方法keyboardWillShow和keyboardWillBeHidden，如下所示：

- (void)keyboardWillShow:(NSNotification *)notification 
{

    // Animates the done button.
    [UIView beginAnimations:nil context:NULL];

    // Display a done button 
    UIBarButtonItem * doneButton = [[UIBarButtonItem alloc]initWithTitle:@"Done"    style:UIBarButtonItemStyleDone target:self action:@selector(hideKeyboard)];
    [[self navigationItem] setRightBarButtonItem:doneButton];

    NSDictionary* info = [notification userInfo];
    CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;

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

    // If active text field is hidden by keyboard, scroll it so it's visible
    // Your application might not need or want this behavior.
    CGRect aRect = self.view.frame;
    aRect.size.height -= kbSize.height;
    NSLog(@"%f", activeField.frame.origin.y);
    if (!CGRectContainsPoint(aRect, activeField.frame.origin) ) {
        CGPoint scrollPoint = CGPointMake(0.0, activeField.frame.origin.y+kbSize.height);
        [self.gridView setContentOffset:scrollPoint animated:YES];
    }

}

// Called when the UIKeyboardWillHideNotification is sent
- (void)keyboardWillBeHidden:(NSNotification *)notification 
{
    // Remove the "done" button
    self.navigationItem.rightBarButtonItem = self.editButtonItem;

    UIEdgeInsets contentInsets = UIEdgeInsetsZero;
    self.gridView.contentInset = contentInsets;
    self.gridView.scrollIndicatorInsets = contentInsets;

}

我在cellForItemAtIndex中设置了textField的委托（类似于cellForRowAtIndexPath）。

目前，滚动到正确位置无法正常工作。我认为问题与 textField 有关，因为当我测试时：

// activeField is a UITextField property that I set in textFieldDidBeginEditing, 
// and later set to nil in textFieldDidEndEditing.
NSLog(@"%f", activeField.frame.origin.y);

它总是返回相同的值，在我的例子中为 95，即使所选的 textField 不在同一行。

有关如何解决此问题或其他解决方案的提示会很棒！

Answer 1

我想我通过为单元格的文本字段设置一个标签，然后从该标签/索引获取单元格来解决它。然后根据单元格的位置而不是单元格内的文本字段计算键盘出现时的位置。