How can I set the night mode color?

From version 5.1, Foxit PDF SDK for iOS supports setting the night mode color as desired. To set the night mode color, you should set the properties FSPDFViewCtrl.mappingModeBackgroundColor and FSPDFViewCtrl.mappingModeForegroundColor at first, and then set the FSPDFViewCtrl.colorMode to FSRendererColorModeMapping.

Note: If the FSPDFViewCtrl.colorMode has already been set to FSRendererColorModeMapping, you still need to set it again after updating the FSPDFViewCtrl.mappingModeBackgroundColor and FSPDFViewCtrl.mappingModeForegroundColor. Otherwise, the settings may not work.

The properties should be changed in the source code of the UI Extensions Component, please refer to Foxit PDF SDK for iOS Developer Guide’s section “Customize UI implementation through source code” to add the “uiextensions” project found in the “libs/uiextensions_src” folder to your project. Then, find the settingBar function in “UIExtensions/UIExtensionsManager.m“, and set the color as you like.

Following is a sample to set the night mode color:

- (void)settingBar: (SettingBar *)settingBar setNightMode: (BOOL)isNightMode {
    if (isNightMode) {
        // Set background color.
        self.pdfViewCtrl.mappingModeBackgroundColor = [UIColor redColor];
        // Set foreground color.
        self.pdfViewCtrl.mappingModeForegroundColor = [UIColor greenColor];
        // Set color mode.
        self.pdfViewCtrl.colorMode = FSRendererColorModeMapping;
        // set the background color for the areas that are out of the pdfviewctrl.
        self.pdfViewCtrl.backgroundColor = [UIColor colorWithRed:20.0/255.0 green:20.0/255.0 blue:20.0/255.0 alpha:1.0];
    }
    else {
        self.pdfViewCtrl.colorMode = FSRendererColorModeNormal;
        self.pdfViewCtrl.backgroundColor = [UIColor colorWithRed:230.0/255.0 green:230.0/255.0 blue:230.0/255.0 alpha:1.0];
    }
    self.hiddenSettingBar = YES;
}