iOS13 暗黑模式适配,代码设置主题模式.

AppDelegate中设置主题模式

 if (@available(iOS 13.0, *)) {
        self.window.overrideUserInterfaceStyle = UIUserInterfaceStyleLight;
    } else {
        // Fallback on earlier versions
    }

UINavigationController中设置导航栏颜色

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    if (@available(iOS 13.0, *)) {
        UIColor *bgColor =  [UIColor ax_colorWithNormalStyle:UIColor.redColor darkStyle:UIColor.systemBackgroundColor];
        
        [self.navigationBar setBackgroundImage:[UIImage ax_imageSquareWithColor:bgColor] forBarMetrics:UIBarMetricsDefault];
    } else {
        // Fallback on earlier versions
    }
}

UINavigationController主题切换时需要手动设置颜色

- (void) traitCollectionDidChange: (UITraitCollection *) previousTraitCollection {
    
    
    [super traitCollectionDidChange: previousTraitCollection];
    
    if (@available(iOS 13.0, *)) {
        
         UIColor *bgColor =  [UIColor colorWithDynamicProvider:^UIColor *(UITraitCollection *traitCollection) {
        if (traitCollection.userInterfaceStyle == UIUserInterfaceStyleDark) {
            return UIColor.systemBackgroundColor;
        }else {
            return UIColor.redColor;
        }}];
             
        [self.navigationBar setBackgroundImage:[UIImage ax_imageSquareWithColor:bgColor] forBarMetrics:UIBarMetricsDefault];
    } else {
        
    }
    
}

代码设置切换主题

        if (ax_keyWindow().overrideUserInterfaceStyle != UIUserInterfaceStyleDark) {
            ax_keyWindow().overrideUserInterfaceStyle = UIUserInterfaceStyleDark;
            
        }else{
            ax_keyWindow().overrideUserInterfaceStyle = UIUserInterfaceStyleLight;
        }