iOS使用自定义字体的方法(内置和任意下载ttf\otf\ttc

提供字体文件路径，返回所需要字体：

-(UIFont*)customFontWithPath:(NSString*)path size:(CGFloat)size
{
    NSURL *fontUrl = [NSURL fileURLWithPath:path];
    CGDataProviderRef fontDataProvider = CGDataProviderCreateWithURL((__bridge CFURLRef)fontUrl);
    CGFontRef fontRef = CGFontCreateWithDataProvider(fontDataProvider);
    CGDataProviderRelease(fontDataProvider);
    CTFontManagerRegisterGraphicsFont(fontRef, NULL);
    NSString *fontName = CFBridgingRelease(CGFontCopyPostScriptName(fontRef));
    UIFont *font = [UIFont fontWithName:fontName size:size];
    CGFontRelease(fontRef);
    return font;
}

这样就不需要在plist设定任何东西，只需要得到字体库文件的路径，就可以取出对应的字体。

上面的方法对于TTF、OTF的字体都有效，但是对于TTC字体，只取出了一种字体。因为TTC字体是一个相似字体的集合体，一般是字体的组合。所以如果对字体要求比较高，所以可以用下面的方法把所有字体取出来：

-(NSArray*)customFontArrayWithPath:(NSString*)path size:(CGFloat)size
{
    CFStringRef fontPath = CFStringCreateWithCString(NULL, [path UTF8String], kCFStringEncodingUTF8);
    CFURLRef fontUrl = CFURLCreateWithFileSystemPath(NULL, fontPath, kCFURLPOSIXPathStyle, 0);
    CFArrayRef fontArray =CTFontManagerCreateFontDescriptorsFromURL(fontUrl);
    CTFontManagerRegisterFontsForURL(fontUrl, kCTFontManagerScopeNone, NULL);
    NSMutableArray *customFontArray = [NSMutableArray array];
    for (CFIndex i = 0 ; i < CFArrayGetCount(fontArray); i++){
        CTFontDescriptorRef  descriptor = CFArrayGetValueAtIndex(fontArray, i);
        CTFontRef fontRef = CTFontCreateWithFontDescriptor(descriptor, size, NULL);
        NSString *fontName = CFBridgingRelease(CTFontCopyName(fontRef, kCTFontPostScriptNameKey));
        UIFont *font = [UIFont fontWithName:fontName size:size];
        [customFontArray addObject:font];
    }
    return customFontArray;
}