uikit——UIFont

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create

// Convenience methods for creating colors+ (UIColor *)colorWithWhite:(CGFloat)white alpha:(CGFloat)alpha;+ (UIColor *)colorWithHue:(CGFloat)hue saturation:(CGFloat)saturation brightness:(CGFloat)brightness alpha:(CGFloat)alpha;+ (UIColor *)colorWithRed:(CGFloat)red green:(CGFloat)green blue:(CGFloat)blue alpha:(CGFloat)alpha;+ (UIColor *)colorWithCGColor:(CGColorRef)cgColor;+ (UIColor *)colorWithPatternImage:(UIImage *)image;#if __has_include(<CoreImage/CoreImage.h>)+ (UIColor *)colorWithCIColor:(CIColor *)ciColor NS_AVAILABLE_IOS(5_0);#endif

解释：

支持gray colorspace
支持HSB colorspace
支持RGB colorspace
支持Quartz color，native color space of Quartz color
支持pattern image，tiled模式绘制，默认相位为0，即image的top-left corner与绘制区域原点对齐
支持Core Image color

init

// Initializers for creating colors- (UIColor *)initWithWhite:(CGFloat)white alpha:(CGFloat)alpha;- (UIColor *)initWithHue:(CGFloat)hue saturation:(CGFloat)saturation brightness:(CGFloat)brightness alpha:(CGFloat)alpha;- (UIColor *)initWithRed:(CGFloat)red green:(CGFloat)green blue:(CGFloat)blue alpha:(CGFloat)alpha;- (UIColor *)initWithCGColor:(CGColorRef)cgColor;- (UIColor *)initWithPatternImage:(UIImage*)image;#if __has_include(<CoreImage/CoreImage.h>)- (UIColor *)initWithCIColor:(CIColor *)ciColor NS_AVAILABLE_IOS(5_0);#endif

注：对应create各种创建UIColor模式

预定义颜色

// Some convenience methods to create colors.  These colors will be as calibrated as possible.// These colors are cached.+ (UIColor *)blackColor;      // 0.0 white + (UIColor *)darkGrayColor;   // 0.333 white + (UIColor *)lightGrayColor;  // 0.667 white + (UIColor *)whiteColor;      // 1.0 white + (UIColor *)grayColor;       // 0.5 white + (UIColor *)redColor;        // 1.0, 0.0, 0.0 RGB + (UIColor *)greenColor;      // 0.0, 1.0, 0.0 RGB + (UIColor *)blueColor;       // 0.0, 0.0, 1.0 RGB + (UIColor *)cyanColor;       // 0.0, 1.0, 1.0 RGB + (UIColor *)yellowColor;     // 1.0, 1.0, 0.0 RGB + (UIColor *)magentaColor;    // 1.0, 0.0, 1.0 RGB + (UIColor *)orangeColor;     // 1.0, 0.5, 0.0 RGB + (UIColor *)purpleColor;     // 0.5, 0.0, 0.5 RGB + (UIColor *)brownColor;      // 0.6, 0.4, 0.2 RGB + (UIColor *)clearColor;      // 0.0 white, 0.0 alpha

系统颜色

// System colors@interface UIColor (UIColorSystemColors)+ (UIColor *)lightTextColor __TVOS_PROHIBITED;                // for a dark background+ (UIColor *)darkTextColor __TVOS_PROHIBITED;                 // for a light background+ (UIColor *)groupTableViewBackgroundColor __TVOS_PROHIBITED;+ (UIColor *)viewFlipsideBackgroundColor NS_DEPRECATED_IOS(2_0, 7_0) __TVOS_PROHIBITED;+ (UIColor *)scrollViewTexturedBackgroundColor NS_DEPRECATED_IOS(3_2, 7_0) __TVOS_PROHIBITED;+ (UIColor *)underPageBackgroundColor NS_DEPRECATED_IOS(5_0, 7_0) __TVOS_PROHIBITED;@end

获取颜色信息

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