swift - 为什么只有内置的 UIColors 在这里工作？

Question

<分区>

Answer 1

这应该适合你:

func switchColor(data: UInt32) {
    guard let contents = backgroundGeometry.firstMaterial?.diffuse.contents else {
        fatalError("First material is nil") // If this really can be empty, just replace this with return
    }

    switch data {
    case 1..<200:
        contents = UIColor(red: 242/255, green: 90/255, blue: 90/255, alpha: 1)
    case 200..<400:
        contents = UIColor(red: 252/255, green: 162/255, blue: 115/255, alpha: 1)
    case 400..<600:
        contents = UIColor(red: 244/255, green: 235/255, blue: 99/255, alpha: 1)
    case 600..<800:
        contents = UIColor(red: 110/255, green: 195/255, blue: 175/255, alpha: 1)
    case 800..<1000:
        contents = UIColor(red: 91/255, green: 118/255, blue: 211/255, alpha: 1)
    default:
        contents = .green
    }
}

颜色的最大值是1.0，不是255，所以需要对值进行除法。