macos - 如何在 Catalina 的自动外观模式下检测 OSX 处于深色模式还是浅色模式

Question

我的 Mac 应用需要根据浅色或深色模式更改行为。

在 macOS Catalina 中将“外观”选项选择为“自动”时，检测样式的最佳方法是什么？

NSDictionary *dict = [[NSUserDefaults standardUserDefaults] persistentDomainForName:NSGlobalDomain];
id style = [dict objectForKey:@"AppleInterfaceStyle"];

BOOL darkModeOn = ( style && [style isKindOfClass:[NSString class]] && NSOrderedSame == [style caseInsensitiveCompare:@"dark"] );

即使从深色选项切换到自动外观选项后，darkModeOn 仍然是 yes/dark。

Answer 1

您需要将 AppleInterfaceStyle 与 macOS Catalina AppleInterfaceStyleSwitchesAutomatically 中引入的这个新值结合起来。

这里有一些伪代码解释如何:

theme = light //default is light
if macOS_10.15
    if UserDefaults(AppleInterfaceStyleSwitchesAutomatically) == TRUE
        if UserDefaults(AppleInterfaceStyle) == NIL
            theme = dark // is nil, means it's dark and will switch in future to light
        else
            theme = light //means it's light and will switch in future to dark
        endif
    else
        if UserDefaults(AppleInterfaceStyle) == NIL
            theme = light
        else
            theme = dark
        endif
    endif
else if macOS_10.14
    if UserDefaults(AppleInterfaceStyle) == NIL
        theme = light
    else
        theme = dark
    endif
endif

您可以在此处查看 macOS 示例应用程序:https://github.com/ruiaureliano/macOS-Appearance .

干杯💪