swift – 对成员’下标’的模糊引用

我收到此错误：“当我尝试更改颜色时,对成员’下标’的模糊引用”：

struct color {
    var r : Float
    var g : Float
    var b : Float
}

func setPixels(image:[color],pixel: Int) {
    let alpha: Float = 1.0
    let pixelView = view.viewWithTag(pixel) as! UIImageView
    pixelView.backgroundColor = UIColor(
        red: image[pixel].r,//Error: Ambiguous reference to member 'subscript'
        green: image[pixel].g,blue: image[pixel].b,alpha: alpha)
}

解决方法

浮动它与CGFloat不同.你必须将CGFloat传递给UIColor.注意：您应该以大写字母开头命名结构.

struct Color {
    let r: CGFloat
    let g: CGFloat
    let b: CGFloat
}

class ViewController: UIViewController{
    func setPixels(image: [Color],pixel: Int) {
        let alpha: CGFloat = 1
        let pixelView = view.viewWithTag(pixel) as! UIImageView
        pixelView.backgroundColor = UIColor(
            red: image[pixel].r,green: image[pixel].g,alpha: alpha
        )
    }
}