出现键盘时，带有大单元格的UITableViewController会变怪，隐藏UITextView

Question

I created a new project just to test this.

Demo

Create a Master-Detail project. On the Main_iPhone.storyboard :

1. Change the prototype cell style to Custom.
2. Make the Table View's row height 504 to fill the whole screen with each cell.
3. Put a UITextView filling the bottom half of the prototype cell.
4. In MasterViewController.m , Remove this line from cellForRowAtIndexPath:

cell.textLabel.text = [object description];

Run the project and add some cells. Then tap on the text view to edit the content.

Description of the problem

Every time I tap on the Text View, the cell scrolls up to reveal the text view momentarily (as it should), and then scrolls back down so that the top of the cell is visible, which hides the text view behind the keyboard.

Video

This question has a video of the problem: UITableView in iOS 7 not scrolling to correct location when editing UITextView in cell

Question

What could be causing this? Can you find any Apple documentation that talks about how a UITableViewController handles keyboards?

Answer 1

I was able to hack around this problem using TPKeyboardAvoidingTableView and adding this to my UITableViewController subclass:

- (void)viewWillAppear:(BOOL)animated
{
    // Removed to avoid default tableview scrolling behavior when the keyboard appears
    //[super viewWillAppear:animated]; 
}

Just using TPKeyboardAvoidingTableView alone was not enough, because the default behavior from the UITableViewController would override it. Preventing viewWillAppear from running was the only way I could find to stop that behavior. But I dislike this solution because I don't know what else I might be loosing.