ios - 无法将类型 'NSMutableArray' 的值转换为预期的参数类型 '[SKTexture]'

Question

我收到以下代码的错误:

func prepareAnimationForDictionary(settings: NSDictionary,repeated: Bool) -> SKAction {
        let atlas: SKTextureAtlas = 
          SKTextureAtlas(named: settings["AtlasFileName"] as! String)
        let textureNames:NSArray = settings["Frames"] as! NSArray
        let texturePack: NSMutableArray = []

        for texPath in textureNames {
            texturePack.addObject(atlas.textureNamed(texPath as! String))
        }

        let timePerFrame: NSTimeInterval = Double(1.0/(settings["FPS"] 
         as! Float))

        let anim:SKAction = SKAction.animateWithTextures(texturePack, 
          timePerFrame: timePerFrame) // the error I get is here
        if repeated {
        return SKAction.repeatActionForever(anim)
        }else{
        return anim
        }

Answer 1

只需使用预期的(Swift)类型

...
let textureNames = settings["Frames"] as! [String]
var texturePack =  [SKTexture]()

for texPath in textureNames {
    texturePack.append(atlas.textureNamed(texPath))
}
...

从 Swift 的角度来看，可变的 Foundation 集合类型 NSMutableArray 和 NSMutableDictionary 是类型未指定的，并且与 Swift native 对应类型无关。