Ios “快速附加参数”；宽度“；在CGRect中调用

我试图在代码中添加几个按钮 我得到一个错误“额外参数”宽度“在调用中”

让yPos=txt.frame.origin.y+txt.frame.height
因为我犯了一个错误，我不得不把所有的参数都转换成CGFloat

       for i in 0...2 {
        let yt : CGFloat = CGFloat(i*40) + yPos
        //let b = UIButton(frame: CGRect(x: xPos, y: 40, width: 100, height: 30))
        var b = UIButton(frame: CGRect(x: xPos, y: yt, width: 100, height: 30))
        b.addGestureRecognizer(UITapGestureRecognizer(target: self, action: "test:"))
        b.backgroundColor = UIColor.blackColor()
        b.tag = i
        self.addSubview(b)
    }

我的错误是我不得不把所有的论据都交给我

       for i in 0...2 {
        let yt : CGFloat = CGFloat(i*40) + yPos
        //let b = UIButton(frame: CGRect(x: xPos, y: 40, width: 100, height: 30))
        var b = UIButton(frame: CGRect(x: xPos, y: yt, width: 100, height: 30))
        b.addGestureRecognizer(UITapGestureRecognizer(target: self, action: "test:"))
        b.backgroundColor = UIColor.blackColor()
        b.tag = i
        self.addSubview(b)
    }

我的错误是我不得不把所有的论据都交给我

       for i in 0...2 {
        let yt : CGFloat = CGFloat(i*40) + yPos
        //let b = UIButton(frame: CGRect(x: xPos, y: 40, width: 100, height: 30))
        var b = UIButton(frame: CGRect(x: xPos, y: yt, width: 100, height: 30))
        b.addGestureRecognizer(UITapGestureRecognizer(target: self, action: "test:"))
        b.backgroundColor = UIColor.blackColor()
        b.tag = i
        self.addSubview(b)
    }

我的错误是我不得不把所有的论据都交给我

       for i in 0...2 {
        let yt : CGFloat = CGFloat(i*40) + yPos
        //let b = UIButton(frame: CGRect(x: xPos, y: 40, width: 100, height: 30))
        var b = UIButton(frame: CGRect(x: xPos, y: yt, width: 100, height: 30))
        b.addGestureRecognizer(UITapGestureRecognizer(target: self, action: "test:"))
        b.backgroundColor = UIColor.blackColor()
        b.tag = i
        self.addSubview(b)
    }