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]; }