How to display the iPhone/iPad keyboard over a full screen OpenGL ES app

Question

I\'m working on an app that at some point requires keyboard input. My app uses OpenGL ES for display, and I have my own graphics framework that can display a text field, and kno

Answer 1

I can't point you at a working example, but I believe what you're looking for is here http://developer.apple.com/library/ios/#documentation/UIKit/Reference/UIKeyInput_Protocol/Reference/Reference.html#//apple_ref/occ/intf/UIKeyInput

The basic idea is that you implement the UIKeyInput protocol on a UIResponder object, such as a UIView. Make the view the firstResponder and the keyboard should automatically appear. The UIKeyInput protocol gives you simple feedback for inserting a character and deleting a character when the user presses buttons on the keyboard.

This isn't working code, but it would look something like this:

@interface MyKeyboardView : UIView <UIKeyInput>
@end

@implementation MyKeyboardView
- (void)insertText:(NSString *)text {
    // Do something with the typed character
}
- (void)deleteBackward {
    // Handle the delete key
}
- (BOOL)hasText {
    // Return whether there's any text present
    return YES;
}
- (BOOL)canBecomeFirstResponder {
    return YES;
}
@end

when the view is attched, make it the first responder to show the keyboard

[myView becomeFirstResponder];

or resign first responder to dismiss the keyboard

[myView resignFirstResponder];

Edit: make sure your view is attached to the view hierarchy or this probably won't do anything.