UIInterface（待补充）

定义与拓展

UIBarStyle

各种 Bar 上见得比较多

typedef NS_ENUM(NSInteger, UIBarStyle) {
    UIBarStyleDefault          = 0,
    UIBarStyleBlack            = 1,
}

UIUserInterfaceSizeClass

未知

typedef NS_ENUM(NSInteger, UIUserInterfaceSizeClass) {
    UIUserInterfaceSizeClassUnspecified = 0,
    UIUserInterfaceSizeClassCompact     = 1,
    UIUserInterfaceSizeClassRegular     = 2,
}

UIUserInterfaceStyle

未知

typedef NS_ENUM(NSInteger, UIUserInterfaceStyle) {
    UIUserInterfaceStyleUnspecified,
    UIUserInterfaceStyleLight,
    UIUserInterfaceStyleDark,
} __TVOS_AVAILABLE(10_0) __IOS_PROHIBITED __WATCHOS_PROHIBITED;

UIUserInterfaceLayoutDirection

未知

typedef NS_ENUM(NSInteger, UIUserInterfaceLayoutDirection) {
    UIUserInterfaceLayoutDirectionLeftToRight,
    UIUserInterfaceLayoutDirectionRightToLeft,
} NS_ENUM_AVAILABLE_IOS(5_0);

UITraitEnvironmentLayoutDirection

未知

typedef NS_ENUM(NSInteger, UITraitEnvironmentLayoutDirection) {
    UITraitEnvironmentLayoutDirectionUnspecified = -1,
    UITraitEnvironmentLayoutDirectionLeftToRight = UIUserInterfaceLayoutDirectionLeftToRight,
    UITraitEnvironmentLayoutDirectionRightToLeft = UIUserInterfaceLayoutDirectionRightToLeft,
} NS_ENUM_AVAILABLE_IOS(10_0);

UIDisplayGamut

未知

typedef NS_ENUM(NSInteger, UIDisplayGamut) {
    UIDisplayGamutUnspecified = -1,
    UIDisplayGamutSRGB,
    UIDisplayGamutP3
} NS_ENUM_AVAILABLE_IOS(10_0);

颜色

    [UIColor lightGrayColor];
    [UIColor darkGrayColor];
    [UIColor groupTableViewBackgroundColor];

字体

    [UIFont labelFontSize];  // 17
    [UIFont buttonFontSize]; // 18
    [UIFont smallSystemFontSize]; // 12
    [UIFont systemFontSize]; // 14