iOS 打印系统字体

     NSArray * array = [UIFont familyNames];

     for( NSString *familyName in array ){
         printf( "Family: %s \n", [familyName UTF8String] );
         NSArray *fontNames = [UIFont fontNamesForFamilyName:familyName];
         for( NSString *fontName in fontNames ){
             printf( "\tFont: %s \n", [fontName UTF8String] );
         }
     }