iOS/macOS-绘制图像/图标以供系统着色的最佳方式

创建一组受操作系统影响的图标以显示彩色/重音版本的最佳方法是什么

就如,；

• 选定版本
• 重音版本

我有大约10个黑色版本，但想有选择或系统选择的口音颜色调整他们。我应该如何处理我的图标，让它们被操作系统着色

有路线图吗

这段代码向您展示了如何根据iOS主题和设置包添加并设置一个可选图标。我还添加了accent1Icon和accent2Icon作为示例

在Settings.bundle中，您需要将多值应用程序项添加到首选项中（苹果要求用户可以更改主题，即使您根据其iOS设置自动设置主题）：

将此添加到您的info.plist：

<dict>
    <key>CFBundleAlternateIcons</key>
    <dict>
        <key>darkIcon</key>
        <dict>
            <key>CFBundleIconFiles</key>
            <array>
                <string>name-of-dark-icon</string>
            </array>
            <key>UIPrerenderedIcon</key>
            <false/>
        </dict>
        <key>accent1Icon</key>
        <dict>
            <key>CFBundleIconFiles</key>
            <array>
                <string>name-of-accent1-icon</string>
            </array>
            <key>UIPrerenderedIcon</key>
            <false/>
        </dict>  
        <key>accent2Icon</key>
        <dict>
            <key>CFBundleIconFiles</key>
            <array>
                <string>name-of-accent2-icon</string>
            </array>
            <key>UIPrerenderedIcon</key>
            <false/>
        </dict>     
    </dict>
    <key>CFBundlePrimaryIcon</key>
    <dict>
        <key>CFBundleIconFiles</key>
        <array>
            <string>AppIcon</string>
        </array>
        <key>UIPrerenderedIcon</key>
        <false/>
    </dict>
</dict>

您可以在AppDelegate应用程序IDBECOMEACTIVE（或其他地方）中运行changeIcon代码。如果选择在那里运行，则需要将其添加到AppDelegate文件中：

enum AppIconTheme: String {
   case UseiOSTheme = "0"
   case DarkTheme = "1"
   case LightTheme = "2"
   case Accent1Theme = "3"
   case Accent2Theme = "4"
}

func applicationDidBecomeActive(_ application: UIApplication) {
// update icon if dark mode
if #available(iOS 12.0, *) {
    var theme = AppIconTheme.UseiOSTheme
    if let iconTheme = UserDefaults.standard.string(forKey: SettingsBundleHelper.SettingsBundleKeys.AppIconThemeKey) {
        if let themeSettings = AppIconTheme(rawValue: iconTheme) {
            theme = themeSettings
        }
    }
    print(theme as Any)
    switch (theme) {
        case .UseiOSTheme:
            if UIApplication.shared.windows[0].rootViewController?.traitCollection.userInterfaceStyle == .dark {
                self.changeIcon(to: "darkIcon")
            } else {
                self.changeIcon(to: nil)
            }
        case .LightTheme:
            self.changeIcon(to: nil)
        case .DarkTheme:
            self.changeIcon(to: "darkIcon")
        case .Accent1Theme:
            self.changeIcon(to: "accent1Icon")
        case .Accent2Theme:
            self.changeIcon(to: "accent2Icon")
        }
    } else {
        // Fallback on earlier versions
        var theme = AppIconTheme.UseiOSTheme
        if let iconTheme = UserDefaults.standard.string(forKey: SettingsBundleHelper.SettingsBundleKeys.AppIconThemeKey) {
            theme = AppIconTheme(rawValue: iconTheme)!
        }
        print(theme as Any)
        switch (theme) {
        case .UseiOSTheme:
            self.changeIcon(to: nil)
        case .LightTheme:
            self.changeIcon(to: nil)
        case .DarkTheme:
            self.changeIcon(to: "darkIcon")
        case .Accent1Theme:
            self.changeIcon(to: "accent1Icon")
        case .Accent2Theme:
            self.changeIcon(to: "accent2Icon")
        }
    }
}

func changeIcon(to name: String?) {
    //Check if the app supports alternating icons
    guard UIApplication.shared.supportsAlternateIcons else {
        return;
    }

    if UIApplication.shared.alternateIconName != name {
        //Change the icon to a specific image with given name
        // if name is nil, the app icon will be the default app icon
        UIApplication.shared.setAlternateIconName(name) { (error) in
             //After app icon changed, print our error or success message
             if let error = error {
                 print("App icon failed to due to \(error.localizedDescription)")
             } else {
                 print("App icon changed successfully.")
             }
        }
    }
}

以下是Apple在setAlternativeIcon上提供的文档：

---

非常感谢你。我会试试看。再次感谢您。@LordAnubis，很乐意帮忙@洛丹努比斯，如果这个答案解决了你的问题，请接受它。：-）我会忙着在macOS项目中实现它。

<dict>
    <key>CFBundleAlternateIcons</key>
    <dict>
        <key>darkIcon</key>
        <dict>
            <key>CFBundleIconFiles</key>
            <array>
                <string>name-of-dark-icon</string>
            </array>
            <key>UIPrerenderedIcon</key>
            <false/>
        </dict>
        <key>accent1Icon</key>
        <dict>
            <key>CFBundleIconFiles</key>
            <array>
                <string>name-of-accent1-icon</string>
            </array>
            <key>UIPrerenderedIcon</key>
            <false/>
        </dict>  
        <key>accent2Icon</key>
        <dict>
            <key>CFBundleIconFiles</key>
            <array>
                <string>name-of-accent2-icon</string>
            </array>
            <key>UIPrerenderedIcon</key>
            <false/>
        </dict>     
    </dict>
    <key>CFBundlePrimaryIcon</key>
    <dict>
        <key>CFBundleIconFiles</key>
        <array>
            <string>AppIcon</string>
        </array>
        <key>UIPrerenderedIcon</key>
        <false/>
    </dict>
</dict>

YourProject 
|
+-- Alternate Icons (folder)
   |
   +-- name-of-dark-icon@2x.png
   +-- name-of-dark-icon@3x.png
   +-- name-of-accent1-icon@2x.png
   +-- name-of-accent1-icon@3x.png
   +-- name-of-accent2-icon@2x.png
   +-- name-of-accent2-icon@3x.png

enum AppIconTheme: String {
   case UseiOSTheme = "0"
   case DarkTheme = "1"
   case LightTheme = "2"
   case Accent1Theme = "3"
   case Accent2Theme = "4"
}

func applicationDidBecomeActive(_ application: UIApplication) {
// update icon if dark mode
if #available(iOS 12.0, *) {
    var theme = AppIconTheme.UseiOSTheme
    if let iconTheme = UserDefaults.standard.string(forKey: SettingsBundleHelper.SettingsBundleKeys.AppIconThemeKey) {
        if let themeSettings = AppIconTheme(rawValue: iconTheme) {
            theme = themeSettings
        }
    }
    print(theme as Any)
    switch (theme) {
        case .UseiOSTheme:
            if UIApplication.shared.windows[0].rootViewController?.traitCollection.userInterfaceStyle == .dark {
                self.changeIcon(to: "darkIcon")
            } else {
                self.changeIcon(to: nil)
            }
        case .LightTheme:
            self.changeIcon(to: nil)
        case .DarkTheme:
            self.changeIcon(to: "darkIcon")
        case .Accent1Theme:
            self.changeIcon(to: "accent1Icon")
        case .Accent2Theme:
            self.changeIcon(to: "accent2Icon")
        }
    } else {
        // Fallback on earlier versions
        var theme = AppIconTheme.UseiOSTheme
        if let iconTheme = UserDefaults.standard.string(forKey: SettingsBundleHelper.SettingsBundleKeys.AppIconThemeKey) {
            theme = AppIconTheme(rawValue: iconTheme)!
        }
        print(theme as Any)
        switch (theme) {
        case .UseiOSTheme:
            self.changeIcon(to: nil)
        case .LightTheme:
            self.changeIcon(to: nil)
        case .DarkTheme:
            self.changeIcon(to: "darkIcon")
        case .Accent1Theme:
            self.changeIcon(to: "accent1Icon")
        case .Accent2Theme:
            self.changeIcon(to: "accent2Icon")
        }
    }
}

func changeIcon(to name: String?) {
    //Check if the app supports alternating icons
    guard UIApplication.shared.supportsAlternateIcons else {
        return;
    }

    if UIApplication.shared.alternateIconName != name {
        //Change the icon to a specific image with given name
        // if name is nil, the app icon will be the default app icon
        UIApplication.shared.setAlternateIconName(name) { (error) in
             //After app icon changed, print our error or success message
             if let error = error {
                 print("App icon failed to due to \(error.localizedDescription)")
             } else {
                 print("App icon changed successfully.")
             }
        }
    }
}