没有为SKShapeNode指定指定的init(circleOfRadius:radius) [英] no designated init for SKShapeNode(circleOfRadius: radius)

问题描述

我试图迅速创建一个SKShapeNode的子类，作为SKShapeNode(circleOfRadius:radius)，但是没有为其指定初始化.

I'm trying to create a subclass of SKShapeNode in swift as SKShapeNode(circleOfRadius: radius) but there is no designated init for it.

任何人都有任何解决方法或有关为什么的信息?我不确定这是错误还是故意的.我发现此视频演示了SKSpriteNode的解决方法，但不适用于我. https://skillsmatter.com/skillscasts/5695-how-to-subclass -a-skspritenode

Anyone have any workarounds or info about why? I'm not sure if this is a bug or intentional. I found this video demonstrating a workaround for SKSpriteNode but its not working for me. https://skillsmatter.com/skillscasts/5695-how-to-subclass-a-skspritenode

总的来说，我正在尝试为SKShapeNode创建一个子类，然后我可以再次从该子类中继承其子版本，以具有不同的版本，从而更轻松地管理我的代码. TIA

Overall i am trying to make a subclass for an SKShapeNode that i can then subclass from again to have different versions of to easier manage my code. TIA

谢谢马丁，我在前面找到了这个例子.它可以工作，但是我如何将其变成圆形而不是矩形?

Thanks Martin i found that example earlier. It works but how would i make that into a circle instead of a rectangle?

import Foundation
import SpriteKit


    class Player : SKShapeNode {

        override init() {
            super.init()
            self.name = "Player"
            self.fillColor = UIColor.blackColor()

        }

        init(rectOfSize: CGSize) {
            super.init()

            var rect = CGRect(origin: CGPointZero, size: rectOfSize)
            self.path = CGPathCreateWithRect(rect, nil)
        }

        required init?(coder aDecoder: NSCoder) {
            fatalError("init(coder:) has not been implemented")
        }
    }

在主代码中

let playerOne = Player(rectOfSize: CGSize(width: 100, height: 100))

推荐答案

这是怎么回事?

class Player: SKShapeNode {

    init(circleOfRadius: CGFloat){
        super.init()

        let diameter = circleOfRadius * 2
        self.path = CGPathCreateWithEllipseInRect(CGRect(origin: CGPointZero, size: CGSize(width: diameter, height: diameter)), nil)
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

}

这篇关于没有为SKShapeNode指定指定的init(circleOfRadius:radius)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！