How do I [legally] get the current first responder on the screen on an iPhone?
- by Anthony D
I submitted my app a little over a week ago and got the dreaded rejection email today. It reads as follows:
Dear -----------,
Thank you for submitting --------- to the App Store. Unfortunately it cannot be added to the App Store because it is using a private API. Use of non-public APIs, which as outlined in the iPhone Developer Program License Agreement section 3.3.1 is prohibited:
"3.3.1 Applications may only use Documented APIs in the manner prescribed by Apple and must not use or call any private APIs."
The non-public API that is included in your application is firstResponder.
Regards,
iPhone Developer Program
Now, the offending API call is actually a solution I found here on SO:
UIWindow *keyWindow = [[UIApplication sharedApplication] keyWindow];
UIView *firstResponder = [keyWindow performSelector:@selector(firstResponder)];
So this is my question; How do I get the current first responder on the screen? I'm looking for a legal way that won't get my app rejected.
Thanks.
I figured this out based on the solution provided by Thomas below. Here is what the final code looks like:
@implementation UIView (FindFirstResponder)
- (UIView *)findFirstResonder
{
if (self.isFirstResponder) {
return self;
}
for (UIView *subView in self.subviews) {
UIView *firstResponder = [subView findFirstResonder];
if (firstResponder != nil) {
return firstResponder;
}
}
return nil;
}
@end
