快速错误-使用未声明的类型

I am building a replica of "Space Invaders" in Swift. The error I am getting:

我正在建造一个“太空入侵者”的复制品。我得到的错误是:

Use of Undeclared Type 'Set'

使用未声明类型'Set'

The following is a sample of my code:

以下是我的代码示例:

override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
    let touch = touches.first as UITouch
    let touchLocation = touch.locationInNode(self)
    let touchedNode = self.nodeAtPoint(touchLocation)
    if(touchedNode.name == "startgame"){
        let gameOverScene = GameScene(size: size)
        gameOverScene.scaleMode = scaleMode
        let transitionType = SKTransition.flipHorizontalWithDuration(1.0)
        view?.presentScene(gameOverScene,transition: transitionType)
    }
}

and:

和:

 override func touchesBegan(touches: Set <NSObject>, withEvent event: UIEvent) {
    /* Called when a touch begins */
    for touch in (touches as Set<UITouch>) {
        let location = touch.locationInNode(self)
        let sprite = SKSpriteNode(imageNamed:"Spaceship")

        sprite.xScale = 0.5
        sprite.yScale = 0.5
        sprite.position = location

        let action = SKAction.rotateByAngle(CGFloat(M_PI), duration:1)

        sprite.runAction(SKAction.repeatActionForever(action))

        self.addChild(sprite)
    }
}

In both cases the error occurs at: (touches: Set<NSObject>, withEvent event: UIEvent)

在这两种情况下，错误都发生在:(触摸:Set ， withEvent事件:UIEvent)

Can someone please suggest a possible solution?

谁能提出一个可能的解决办法吗?

3 个解决方案

#1

I think you are updated your code with new version of swift.

我认为你更新了你的代码，新版本的swift。

This code was for older versions :

本代码适用于旧版本:

override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
    super.touchesBegan(touches, withEvent: event)
}

Set introduced in Swift 1.2

设置在Swift 1.2中。

From Xcode 6.3.2 version :

从Xcode 6.3.2版本:

override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
    super.touchesBegan(touches, withEvent: event)
    var touch : UITouch = (touches.first as? UITouch)!

}

From Xcode 7 (Source : https://*.com/a/28772136/3202193):

来自Xcode 7(来源:https://*.com/a/28772136/3202193):

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    if let touch = touches.first {
        // ...
    }
    super.touchesBegan(touches, withEvent:event)
}

#2

This depends on the xCode version. If you are using xCode 6.3 or xCode 6.4, that means you are on Swift 1.2 then code must be like below:

这取决于xCode版本。如果您正在使用xCode 6.3或xCode 6.4，这意味着您正在使用Swift 1.2，那么代码必须如下所示:

override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
    let touch = touches.first as UITouch
    let touchLocation = touch.locationInNode(self)
    let touchedNode = self.nodeAtPoint(touchLocation)
    if(touchedNode.name == "startgame"){
        let gameOverScene = GameScene(size: size)
        gameOverScene.scaleMode = scaleMode
        let transitionType = SKTransition.flipHorizontalWithDuration(1.0)
        view?.presentScene(gameOverScene,transition: transitionType)
    }
}

If you are on xCode 6.2, that means you are using Swift 1.1 and the code should be like below:

如果您使用的是xCode 6.2，则意味着您正在使用Swift 1.1，代码应如下:

override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
        let touch = touches.first as UITouch
        let touchLocation = touch.locationInNode(self)
        let touchedNode = self.nodeAtPoint(touchLocation)
        if(touchedNode.name == "startgame"){
            let gameOverScene = GameScene(size: size)
            gameOverScene.scaleMode = scaleMode
            let transitionType = SKTransition.flipHorizontalWithDuration(1.0)
            view?.presentScene(gameOverScene,transition: transitionType)
        }
    }

Please note that Set is introduced in Swift 1.2.

请注意，Set是在Swift 1.2中引入的。

Hope this will help you. :)

希望这能对你有所帮助。:)

#3

Upgrade Xcode to 6.3 or 6.4... Set was not introduced until Swift 1.2, which came in Xcode 6.3.

将Xcode升级到6.3或6.4…在Xcode 6.3中出现的Swift 1.2之前没有引入Set。

That is why Xcode is telling you:

这就是为什么Xcode告诉你:

Use of Undeclared Type 'Set'

使用未声明类型'Set'

It does not exist in Xcode 6.2

它在Xcode 6.2中不存在