如何在 swift 3.0 中获取对象名称作为字符串

Question

如果我的播放器与 drugNode 对象发生碰撞，我想将动画的纹理更改为正确的图像。但我不知道如何获得“drugNode”的名称。我的图片命名为“pill1”、“pill2”等等

func playerCollide(drugNode: SKSpriteNode, playerNode: SKSpriteNode){
        let animation = SKEmitterNode(fileNamed: "SpecialFallingParticle")!
        animation.position = drugNode.position

        print(String(describing: drugNode.self.name))
        animation.particleTexture = SKTexture(imageNamed: "\(String(describing: drugNode.name))")
        self.addChild(animation)
        self.run(SKAction.playSoundFileNamed("snacked.mp3", waitForCompletion: false))
        drugNode.removeFromParent()
    
        self.run(SKAction.wait(forDuration: 2)){
            animation.removeFromParent()
        }
    }

输出：

Optional("pill18")
2020-06-25 18:32:50.096389+0200 Snacker[5316:292543] SKTexture: Error loading image resource: "Optional("pill18")"
Optional("pill1")
2020-06-25 18:32:51.597661+0200 Snacker[5316:292543] SKTexture: Error loading image resource: "Optional("pill1")"
Optional("pill21")
2020-06-25 18:32:53.097427+0200 Snacker[5316:292543] SKTexture: Error loading image resource: "Optional("pill21")"

Answer 1

SKSpriteNodereturns一个String?name属性一个String?一个可选String.你需要打开它。如果尚未设置 name，一种选择是使用 nil 合并运算符 ?? 提供默认值：

let name = drugNode.name ?? "defaultImage"

如何在 swift 3.0 中获取对象名称作为字符串

How to get name of object as string in swift 3.0

swift

string

xcode

uikit

sktexture