+ (UIFont *)yq_cloudFontWithFilePath:(NSString *)filePath size:(CGFloat)size
{
    UIFont *systemFont = [UIFont systemFontOfSize:size];
    if (![[NSFileManager defaultManager]fileExistsAtPath:filePath]) {
        return systemFont;
    }
    CFURLRef fontURL = CFURLCreateWithFileSystemPath(kCFAllocatorDefault, (__bridge CFStringRef)filePath, kCFURLPOSIXPathStyle, false);
    CGDataProviderRef dataProvider = CGDataProviderCreateWithURL(fontURL);
    if(!dataProvider) return systemFont;
    CFRelease(fontURL);
    CGFontRef graphicsFont = CGFontCreateWithDataProvider(dataProvider);
    CGDataProviderRelease(dataProvider);
    if (!graphicsFont) return systemFont;
    CTFontRef smallFont = CTFontCreateWithGraphicsFont(graphicsFont, size, NULL, NULL);
    CGFontRelease(graphicsFont);
    UIFont *returnFont = (__bridge UIFont *)smallFont;
    CFRelease(smallFont);
        return returnFont;
}

另一种如下：

+ (UIFont *)yq_cloudFontWithFilePath:(NSString *)filePath size:(CGFloat)size
{
    UIFont *sysFont = [UIFont systemFontOfSize:size];
    if (![[NSFileManager defaultManager]fileExistsAtPath:filePath]) {
        return sysFont;
    }
    CFURLRef fontURL = CFURLCreateWithFileSystemPath(kCFAllocatorDefault, (__bridge CFStringRef)filePath, kCFURLPOSIXPathStyle, false);
    CGDataProviderRef dataProvider = CGDataProviderCreateWithURL(fontURL);
    if(!dataProvider) return sysFont;
    CFRelease(fontURL);
    CGFontRef fontRef = CGFontCreateWithDataProvider(dataProvider);
    CGDataProviderRelease(dataProvider);
    if (!fontRef) return sysFont;
    CFErrorRef errorRef;
    CFStringRef fontName = CGFontCopyPostScriptName(fontRef);
    NSString *fontNameCopy = (__bridge NSString *)(fontName);
    if ([[UIFont familyNames] containsObject:fontNameCopy]) {
        UIFont *font = [self fontWithName:(__bridge NSString *)(fontName) size:size];
        if (fontName) CFRelease(fontName);
        CGFontRelease(fontRef);
        return font;
    } else {
        BOOL suc = CTFontManagerRegisterGraphicsFont(fontRef, &errorRef);
        if (!suc) {
            CGFontRelease(fontRef);
            return sysFont;
        } else {
            UIFont *font = [self fontWithName:(__bridge NSString *)(fontName) size:size];
            if (fontName) CFRelease(fontName);
            CGFontRelease(fontRef);
                       return font;
        }
    }
}