UIButton . 扩大点击区域 重写下面的方法

hitAreaPadding   是传入的size   可以定义为属性

- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event
{
    if (self.hidden || self.alpha == 0 || self.userInteractionEnabled == NO || self.enabled == NO) {
        
        return NO;
    }

    CGRect bounds = self.bounds;
    bounds = CGRectInset(bounds, -self.hitAreaPadding.width, -self.hitAreaPadding.height);
    return CGRectContainsPoint(bounds, point);
}