UI常用字体定义和继承的实例，ResearchKitCode

#import <UIKit/UIKit.h>

@interface UIFont (APCAppearance)

+ (UIFont*) appRegularFontWithSize: (CGFloat) size;

+ (UIFont*) appMediumFontWithSize: (CGFloat) size;

+ (UIFont*) appLightFontWithSize: (CGFloat) size;

+ (UIFont*) appNavBarTitleFont;

+ (UIFont*) appQuestionLabelFont;

+ (UIFont*) appQuestionOptionFont;

@end

#import "UIFont+APCAppearance.h"

#import "APCAppearanceInfo.h"

#import "APCConstants.h"

@implementation UIFont (APCAppearance)

+ (UIFont*) appRegularFontWithSize: (CGFloat) size

{

return [UIFont fontWithName:[APCAppearanceInfo valueForAppearanceKey:kRegularFontNameKey] size:size];

}

+ (UIFont*) appMediumFontWithSize: (CGFloat) size

{

return [UIFont fontWithName:[APCAppearanceInfo valueForAppearanceKey:kMediumFontNameKey] size:size];

}

+ (UIFont*) appLightFontWithSize: (CGFloat) size

{

return [UIFont fontWithName:[APCAppearanceInfo valueForAppearanceKey:kLightFontNameKey] size:size];

}

+ (UIFont*) appNavBarTitleFont {

return [UIFont appMediumFontWithSize:17.0f];

}

+ (UIFont*) appQuestionLabelFont {

return [UIFont appRegularFontWithSize:17.0f];

}

+ (UIFont*) appQuestionOptionFont {

return [UIFont appRegularFontWithSize:44.0f];

}

@end