iOS 利用runtime 实现全局字体的改变

# FontChange  runtime 字体改变工程下载地址

iOS FontChange

iOS 利用runtime 实现全局字体的改变

创建UIFont的类别

UIFont+GHFont.h,UIFont+GHFont.m

+ (void)load{

static dispatch_once_t onceToken;

dispatch_once(&onceToken, ^{

/*利用runtime 实现当调用系统systemFontOfSize:获取字体的时候，调用指定的方法ghFontOfSize 从而重新设置字体*/

kDefultFontName_GH = [UIFont systemFontOfSize:10].fontName;

Class class = [self class];

Method originalMethod = class_getClassMethod(class, @selector(systemFontOfSize:));

Method swizzledMethod = class_getClassMethod(class, @selector(ghFontOfSize:));

method_exchangeImplementations(originalMethod, swizzledMethod);

});

}

+ (UIFont *)ghFontOfSize:(CGFloat)fontSize {

GHFontManager *manager = [GHFontManager sharedFontManager];

NSString *fontName = manager.fontName;

if (fontName == nil) {

fontName = kDefultFontName_GH;

}

return [UIFont fontWithName:fontName  size:fontSize];

}