背景

在我們?nèi)粘Ｉ钪校琔IButton被用到各種各樣的場景之中。為了展示出其小巧和美觀往往都把它做的很小也就是給的size很小。這樣雖然滿足了美觀度，但是造成了點(diǎn)擊體驗(yàn)效果不好的問題。（哈哈，因?yàn)橐话銤h子手指太粗點(diǎn)不到按鈕的問題）。

奮斗的郅博

解決方法

1.給UIButton增加一個(gè)擴(kuò)展類(UIButton(Extension))，在里面添加如下方法

@implementation UIButton (Extension)

@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;
    }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

2.調(diào)用的時(shí)候也異常簡單，UIButton對象調(diào)hitTestEdgeInsets方法即可

 UIButton *button = [[UIButton alloc] initWithFrame:CGRectZero];
//上下左右的各個(gè)方向的Insets量
[button setHitTestEdgeInsets:UIEdgeInsetsMake(-10, -10, -10, -10)];
[self.view addsubview:button];

注：這樣我們點(diǎn)擊UIButton周圍的上下左右各10的位置仍然能觸發(fā)UIButton點(diǎn)擊時(shí)間。這樣就做好了增加UIButton的點(diǎn)擊范圍。