UIButton how to remove from UIView? - iphone

Question

I've set up a Button and add it to a view. I want to add a "done" button to the UIKeyboardTypeNumberPad. Here's my code.
UIButton *doneButton = [UIButton buttonWithType:UIButtonTypeCustom];
doneButton.frame = CGRectMake(0, 163, 106, 53);
doneButton.adjustsImageWhenHighlighted = NO;
[doneButton setImage:[UIImage imageNamed:#"DoneUp.png"] forState:UIControlStateNormal];
[doneButton setImage:[UIImage imageNamed:#"DoneDown.png"] forState:UIControlStateHighlighted];
[doneButton addTarget:self action:#selector(doneButton:) forControlEvents:UIControlEventTouchUpInside];
// locate keyboard view
UIWindow* tempWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:1];
UIView* keyboard;
for(int i=0; i<[tempWindow.subviews count]; i++) {
keyboard = [tempWindow.subviews objectAtIndex:i];
// keyboard view found; add the custom button to it
if([[keyboard description] hasPrefix:#"<UIKeyboard"] == YES)
[keyboard addSubview:doneButton];
}
Everything works great until I want to remove the button if I've got a Kayboard of type NumbersAndPunctuation for example.
If I click the button I use [(UIButton)*sender removeFromSuperview];
to prevent memory leaks.
But how do I remove the button from within an other function?
Thanks a lot!
Some other guys did ask that question somewhere else but didn't get a answer. I'am sure you can help :)

Answer 1

// Where self is a UIView subclass
NSLog(#"subviews: %#",self.subviews);
for(id view in self.subviews ){
if ([view isKindOfClass:[UIButton class]]) {
NSLog(#"Removing a button!");
[view removeFromSuperview];
}
}

Answer 2

You should store a reference to the button, instead of using a local variable. For example:
Header file:
#interface myObject : NSObject {
UIButton *doneButton;
...
Implementation file:
doneButton = [UIButton buttonWithType: UIButtonTypeCustom
...
To remove it (assuming you're in the same object:
[doneButton removeFromSuperview];
However, Apple may not take kindly to you adding buttons to their keyboard.

Answer 3

you can declare your button in your .h file, so you will be able to get access from all class methods