UIFont展开

Question

我想在我的应用程序中扩展UIFont类，这样我就可以使用大/中/小字母的概念。

我创造了但出于某种原因它看起来很奇怪。我完成了它，它做了应该做的事情，但我对它不满意。通常当我有这种感觉的时候，是因为我搞砸了，或者只是个新手。也许我使用的常量是多少？

这段代码在专业上可以接受吗？我在这里寻找的是来自这里有经验的开发人员的输入。

UIFont+AppFonts.h

#import "UIFont+AppFonts.h"

//Contants for cohen ratios.
static const CGFloat cohenRatioSmall = 0.2f;
static const CGFloat cohenRatioMedium = 0.5f;
static const CGFloat cohenRatioLarge = 0.8f;

//Relationship calculation
static const CGFloat fontBaseSize = 34.0f;
static const CGFloat fontSmall = fontBaseSize * cohenRatioSmall;
static const CGFloat fontMedium = fontBaseSize * cohenRatioMedium;
static const CGFloat fontLarge = fontBaseSize * cohenRatioLarge;

//Static variables for the fonts.
static UIFont *DefaultFontSmall = nil;
static UIFont *DefaultFontMedium = nil;
static UIFont *DefaultFontLarge = nil;

static UIFont *DefaultFontBoldSmall = nil;
static UIFont *DefaultFontBoldMedium = nil;
static UIFont *DefaultFontBoldLarge = nil;


@implementation UIFont (AppFonts)

+ (UIFont *) defaultFontSmall { return DefaultFontSmall ?: (DefaultFontSmall= [UIFont systemFontOfSize:fontSmall]);}
+ (UIFont *) defaultFontMedium { return DefaultFontMedium ?: (DefaultFontMedium = [UIFont systemFontOfSize:fontMedium]);}
+ (UIFont *) defaultFontLarge { return DefaultFontLarge ?: (DefaultFontLarge = [UIFont systemFontOfSize:fontLarge]);}
+ (UIFont *) defaultFontBoldSmall { return DefaultFontBoldSmall ?: (DefaultFontBoldSmall = [UIFont boldSystemFontOfSize:fontSmall]);}
+ (UIFont *) defaultFontBoldMedium { return DefaultFontBoldMedium ?: (DefaultFontBoldMedium = [UIFont boldSystemFontOfSize:fontMedium]);}
+ (UIFont *) defaultFontBoldLarge { return DefaultFontBoldLarge ?: (DefaultFontBoldLarge = [UIFont boldSystemFontOfSize:fontLarge]);}

@end

Answer 1

看起来不错，不过我会用苹果大会上的名字systemFontOfSizeSmall或systemFontSmall。

Answer 2

我会为此做一个宏：

//Contants for cohen ratios.
static const CGFloat cohenRatioSmall = 0.2f;
static const CGFloat cohenRatioMedium = 0.5f;
static const CGFloat cohenRatioLarge = 0.8f;

//Relationship calculation
static const CGFloat fontBaseSize = 34.0f;
static const CGFloat fontSmall = fontBaseSize * cohenRatioSmall;
static const CGFloat fontMedium = fontBaseSize * cohenRatioMedium;
static const CGFloat fontLarge = fontBaseSize * cohenRatioLarge;

#define DEFINE_SYSTEM_FONT(name, size) \
    + (UIFont *)name { \
        static UIFont *font; \
        return font ?: (font = [UIFont systemFontOfSize:size]); \
    }

#define DEFINE_BOLD_SYSTEM_FONT(name, size) \
    + (UIFont *)name { \
        static UIFont *font; \
        return font ?: (font = [UIFont boldSystemFontOfSize:size]); \
    }


@implementation UIFont (AppFonts)

DEFINE_SYSTEM_FONT(defaultFontSmall, fontSmall)
...

@end