gistfile1.m

@implementation UIFont (CustomSystemFont)


// swizzle methods for system fonts so we can use
+ (void)load
{
    Method orig = class_getClassMethod([UIFont class], @selector(systemFontOfSize:));
    Method swiz = class_getClassMethod([UIFont class], @selector(_systemFontOfSize:));
    method_exchangeImplementations(orig, swiz);
    
    orig = class_getClassMethod([UIFont class], @selector(boldSystemFontOfSize:));
    swiz = class_getClassMethod([UIFont class], @selector(_boldSystemFontOfSize:));
    method_exchangeImplementations(orig, swiz);
    
    orig = class_getClassMethod([UIFont class], @selector(italicSystemFontOfSize:));
    swiz = class_getClassMethod([UIFont class], @selector(_italicSystemFontOfSize:));
    method_exchangeImplementations(orig, swiz);
}

+ (UIFont *)_systemFontOfSize:(CGFloat)fontSize
{
    return [UIFont fontWithName:@"Helvetica" size:fontSize];
}

+ (UIFont *)_boldSystemFontOfSize:(CGFloat)fontSize
{
    return [UIFont fontWithName:@"Helvetica-Bold" size:fontSize];
}

+ (UIFont *)_italicSystemFontOfSize:(CGFloat)fontSize
{
    return [UIFont fontWithName:@"Helvetica-Light" size:fontSize];
}

@end