如何将 SwiftUI 颜色更改为 UIColor? [英] How can I change a SwiftUI Color to UIColor?

问题描述

我正在尝试将 SwiftUI Color 更改为 UIColor 的实例.

I'm trying to change a SwiftUI Color to an instance of UIColor.

我可以轻松地从 UIColor 获取 RGBA，但我不知道如何获取颜色"实例返回相应的 RGB 和不透明度值.

I can easily get the RGBA from the UIColor, but I don't know how to get the "Color" instance to return the corresponding RGB and opacity values.

@EnvironmentObject var colorStore: ColorStore

init() {
    let red =     //get red value from colorStore.primaryThemeColor
    let green = //get green value from colorStore.primaryThemeColor
    let blue =   //get blue value from colorStore.primaryThemeColor
    let alpha = //get alpha value from colorStore.primaryThemeColor
    
    let color = UIColor(red: red, green: green, blue: blue, alpha: alpha)
    UINavigationBar.appearance().tintColor = color
}

...或者也许有更好的方法来完成我正在寻找的东西?

...or maybe there is a better way to accomplish what I am looking for?

推荐答案

SwiftUI 2.0

有一个新的初始化器，它采用 Color 并为 iOS 或 NSColor 返回 UIColor 为 <强>macOS 现在.所以:

SwiftUI 2.0

There is a new initializer that takes a Color and returns a UIColor for iOS or NSColor for macOS now. So:

UIColor(Color.red)

---

macOS

NSColor(Color.red)

---

核心图形

UIColor(Color.red).cgColor /* For iOS */
NSColor(Color.red).cgColor /* For macOS */

如果您正在寻找颜色组件，您可以在在此答案中找到有用的扩展

If you are looking for color components, you can find a helpful extensions here in this answer

另外，请查看如何将 UIColor 转换为 SwiftUI 的颜色

Also, check out How to convert UIColor to SwiftUI‘s Color

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