UITextField delegate jumping to 100% CPU usage and crashing upon using keyboard shortcut

Question

So, I have a UITextField subclass which is it\'s own Delegate and is crashing when keyboard shortcuts are used. It maxes out on CPU an

Answer 1

I encountered the same issue today when working with a self-delegating UITextField subclass. If it is not possible to change the delegate to something other than self, I would recommend overriding respondsToSelector rather than implementing a customOverlayContainer method that may return an invalid object (are you sure it's supposed to be an instance of UITextField? How do you know iOS isn't asking for a UIView or a CGLayer or any other type of object?)

-(BOOL) respondsToSelector:(SEL)aSelector {

    NSString * selectorName = NSStringFromSelector(aSelector);

    if ([selectorName isEqualToString:@"customOverlayContainer"]) {

        NSLog(@"preventing self.delegate == self crash");

        return NO;
    }

    return [super respondsToSelector:aSelector];
}

Answer 2

Problem solved by changing the delegate to the object which inits my text view.

Answer 3

I solved this by custom customOverlayContainer and return the textFiled. eg.

@implementation CustomTextField

- (id)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        self.delegate = self;
    }
    return self;
}

- (id)customOverlayContainer {
    return self;
}

@end

Tested on iOS 7 and iOS 6.