PaintCode StyleKit Swift 3.0 Error with CGGradient

问题

StyleKit Code:

static let red: UIColor = UIColor(red: 0.800, green: 0.000, blue: 0.000, alpha: 1.000)
static let blue: UIColor = UIColor(red: 0.200, green: 0.600, blue: 1.000, alpha: 1.000)
static let green: UIColor = UIColor(red: 0.000, green: 0.600, blue: 0.200, alpha: 1.000)
static let yinying: UIColor = UIColor(red: 1.000, green: 1.000, blue: 1.000, alpha: 0.200) static let redGradient: CGGradient = CGGradientCreateWithColors(CGColorSpaceCreateDeviceRGB(), [UIColor.whiteColor().CGColor, UIColor.whiteColor().blendedColorWithFraction(0.5, ofColor: StyleKitMarkSix.red).CGColor, StyleKitMarkSix.red.CGColor], [0, 0, 1])!
static let blueGradient: CGGradient = CGGradientCreateWithColors(CGColorSpaceCreateDeviceRGB(), [UIColor.whiteColor().CGColor, UIColor.whiteColor().blendedColorWithFraction(0.5, ofColor: StyleKitMarkSix.blue).CGColor, StyleKitMarkSix.blue.CGColor], [0, 0, 1])!
static let greenGradient: CGGradient = CGGradientCreateWithColors(CGColorSpaceCreateDeviceRGB(), [UIColor.whiteColor().CGColor, UIColor.whiteColor().blendedColorWithFraction(0.5, ofColor: StyleKitMarkSix.green).CGColor, StyleKitMarkSix.green.CGColor], [0, 0, 1])!
static let blackGradient: CGGradient = CGGradientCreateWithColors(CGColorSpaceCreateDeviceRGB(), [UIColor.whiteColor().CGColor, UIColor.whiteColor().blendedColorWithFraction(0.5, ofColor: UIColor.blackColor()).CGColor, UIColor.blackColor().CGColor], [0, 0, 1])!

error message:

Contextual type 'CFArray' cannot be used with array literal

i have changed:

static let redGradient: CGGradient = CGGradient(colorsSpace: CGColorSpaceCreateDeviceRGB(), colors: [UIColor.whiteColor().CGColor, UIColor.whiteColor().blendedColorWithFraction(0.5, ofColor: StyleKitMarkSix.red).CGColor, StyleKitMarkSix.red.CGColor] , locations:[0, 0, 1])!

also error

回答1:

There are a few more things you need to change:

UIColor.whiteColor() is now UIColor.white.
.CGColor is now .cgColor
You need to cast your colors array to CFArray. Implicit casts to bridged types are no longer done in Swift 3.
Swift can infer the type of redGradient so you can drop the : CGGradient.

With these changes, the code becomes:

static let redGradient = CGGradient(colorsSpace: CGColorSpaceCreateDeviceRGB(),
    colors: [UIColor.white.cgColor, UIColor.white.blendedColorWithFraction(0.5, ofColor: StyleKitMarkSix.red).cgColor, StyleKitMarkSix.red.cgColor] as CFArray,
    locations: [0, 0, 1])!

来源：https://stackoverflow.com/questions/39553958/paintcode-stylekit-swift-3-0-error-with-cggradient

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swift

swift3