.h

#import 

#import 

@interface UIButton (SCLargeRange)

- (void)setEnlargeEdge:(CGFloat) size;

- (void)setEnlargeEdgeWithTop:(CGFloat) top right:(CGFloat) right bottom:(CGFloat) bottom left:(CGFloat) left;

@end

.m

#import "UIButton+SCLargeRange.h"

@implementation UIButton (SCLargeRange)

static char topNameKey;

static char rightNameKey;

static char bottomNameKey;

static char leftNameKey;

- (void)setEnlargeEdge:(CGFloat) size

{

 objc_setAssociatedObject(self, &topNameKey, [NSNumber numberWithFloat:size], OBJC_ASSOCIATION_COPY_NONATOMIC);

 objc_setAssociatedObject(self, &rightNameKey, [NSNumber numberWithFloat:size], OBJC_ASSOCIATION_COPY_NONATOMIC);

 objc_setAssociatedObject(self, &bottomNameKey, [NSNumber numberWithFloat:size], OBJC_ASSOCIATION_COPY_NONATOMIC);

 objc_setAssociatedObject(self, &leftNameKey, [NSNumber numberWithFloat:size], OBJC_ASSOCIATION_COPY_NONATOMIC);

}

- (void)setEnlargeEdgeWithTop:(CGFloat) top right:(CGFloat) right bottom:(CGFloat) bottom left:(CGFloat) left

{

 objc_setAssociatedObject(self, &topNameKey, [NSNumber numberWithFloat:top], OBJC_ASSOCIATION_COPY_NONATOMIC);

 objc_setAssociatedObject(self, &rightNameKey, [NSNumber numberWithFloat:right], OBJC_ASSOCIATION_COPY_NONATOMIC);

 objc_setAssociatedObject(self, &bottomNameKey, [NSNumber numberWithFloat:bottom], OBJC_ASSOCIATION_COPY_NONATOMIC);

 objc_setAssociatedObject(self, &leftNameKey, [NSNumber numberWithFloat:left], OBJC_ASSOCIATION_COPY_NONATOMIC);

}

- (CGRect)enlargedRect

{

 NSNumber* topEdge = objc_getAssociatedObject(self, &topNameKey);

 NSNumber* rightEdge = objc_getAssociatedObject(self, &rightNameKey);

 NSNumber* bottomEdge = objc_getAssociatedObject(self, &bottomNameKey);

 NSNumber* leftEdge = objc_getAssociatedObject(self, &leftNameKey);

 if (topEdge && rightEdge && bottomEdge && leftEdge)

    {

 return CGRectMake(self.bounds.origin.x - leftEdge.floatValue,

 self.bounds.origin.y - topEdge.floatValue,

 self.bounds.size.width + leftEdge.floatValue + rightEdge.floatValue,

 self.bounds.size.height + topEdge.floatValue + bottomEdge.floatValue);

    }

 else

    {

 return self.bounds;

    }

}

- (UIView*)hitTest:(CGPoint) point withEvent:(UIEvent*) event

{

 CGRect rect = [self enlargedRect];

 if (CGRectEqualToRect(rect, self.bounds))

    {

 return [super hitTest:point withEvent:event];

    }

 return CGRectContainsPoint(rect, point) ? self : nil;

}

@end