上篇中有提到不规则视图 这里就不再赘述

不规则UIView.png

1. 已经画好的UIBezierPath对象marginalPath

2.这里直接在上篇的不规则View上添加了个Button

button.frame = self.bounds        button.setBackgroundImage(creatImageWithColor(color: UIColor.red), for: .highlighted)
button.isUserInteractionEnabled  = false

重写view的touchBegan和touchEnd方法
在touchBegan中获取到当前手指触摸的点
然后利用UIBezierPath 类中系统提供的contains方法 判断当前触摸点是否在path中，在就把按钮置为高亮 ，触摸结束后按钮取消高亮状态

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        let touch:UITouch = ((touches as NSSet).anyObject()! )as!UITouch
        let point = touch.location(in: self)
        if marginalPath.contains(point)
        {
            print("包含")
            button.isHighlighted = true
        }
        else{
         print("no")
        }
        
    }
    
    override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
        button.isHighlighted = false
    }

//生成一张纯色的图片
   func creatImageWithColor(color:UIColor)->UIImage{
        let rect = CGRect(x:0,y:0,width:1,height:1)
        UIGraphicsBeginImageContext(rect.size)
        let context = UIGraphicsGetCurrentContext()
        context?.setFillColor(color.cgColor)
        context!.fill(rect)
        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return image!
    }