(转)A drop-in universal solution for moving text fields out of the way of the keyboard

There are a hundred and one proposed solutions out there for how to move

UITextField

and

UITextView

out of the way of the keyboard during editing — usually, it comes down to observing

UIKeyboardWillShowNotification

and

UIKeyboardWillHideNotification

, or implementing

UITextFieldDelegate

delegate methods, and adjusting the frame of the superview, or using

UITableView

‘s

scrollToRowAtIndexPath:atScrollPosition:animated:

, but all the proposed solutions I’ve found tend to be quite DIY, and have to be implemented for each view controller that needs it.

I thought I’d put together a relatively universal, drop-in solution:

UIScrollView

and

UITableView

subclasses that handle everything.

When the keyboard is about to appear, the subclass will find the subview that’s about to be edited, and adjust its frame and content offset to make sure that view is visible, with an animation to match the keyboard pop-up. When the keyboard disappears, it restores its prior size.

It should work with basically any setup, either a UITableView-based interface, or one consisting of views placed manually.


For non-UITableViewControllers, use it as-is by dropping the

TPKeyboardAvoidingScrollView

source files into your project, popping a

UIScrollView

into your view controller’s xib, setting the class to

TPKeyboardAvoidingScrollView

, and putting all your controls within that scroll view.

To use it with UITableViewController, pop the

TPKeyboardAvoidingTableView

source files in, and just make your UITableView a

TPKeyboardAvoidingTableView

in the xib — everything should be taken care of.

You can grab the source files, which includes a sample project, over on the GitHub project page