#import <objc/runtime.h>
@implementation UIButton (Extensions)
@dynamic hitTestEdgeInsets;
static const NSString *KEY_HIT_TEST_EDGE_INSETS = @"HitTestEdgeInsets";
-(void)setHitTestEdgeInsets:(UIEdgeInsets)hitTestEdgeInsets {
NSValue *value = [NSValue value:&hitTestEdgeInsets withObjCType:@encode(UIEdgeInsets)];
objc_setAssociatedObject(self, &KEY_HIT_TEST_EDGE_INSETS, value, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
-(UIEdgeInsets)hitTestEdgeInsets {
NSValue *value = objc_getAssociatedObject(self, &KEY_HIT_TEST_EDGE_INSETS);
if(value) {
UIEdgeInsets edgeInsets;
[value getValue:&edgeInsets];
return edgeInsets;
[value getValue:&edgeInsets];
return edgeInsets;
}else {
return UIEdgeInsetsZero;
}
}
- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event {
if(UIEdgeInsetsEqualToEdgeInsets(self.hitTestEdgeInsets, UIEdgeInsetsZero) || !self.enabled || self.hidden) {
return [super pointInside:point withEvent:event];
}
CGRect relativeFrame = self.bounds;
CGRect hitFrame = UIEdgeInsetsInsetRect(relativeFrame, self.hitTestEdgeInsets);
return CGRectContainsPoint(hitFrame, point);
}
@end
Usage-
_backBtn = [[UIButton alloc]initWithFrame:CGRectMake(16, 12, 28, 28)];
[_backBtn setBackgroundImage:[UIImage imageNamed:@"backphoto"] forState:UIControlStateNormal];
[_backBtn addTarget:self action:@selector(backButtonClicked) forControlEvents:UIControlEventTouchUpInside];
[_backBtn setHitTestEdgeInsets:UIEdgeInsetsMake(-15, -15, -15, -15)];//increase the hit area of button by 15 on all sides top,left,bottom,right
