Custom CoreText Fonts

gistfile1.m

    NSString *fontPath = [[NSBundle mainBundle] pathForResource:_fontName ofType:@"otf"];
    CGDataProviderRef fontDataProvider = CGDataProviderCreateWithFilename([fontPath UTF8String]);
    // 从DataProvider创建字体
    CGFontRef theCGFont =CGFontCreateWithDataProvider(fontDataProvider); 
    CTFontRef theCTFont=CTFontCreateWithGraphicsFont(theCGFont,_fontSize,NULL,NULL); 
    CFRelease(theCGFont); 
    CFRelease(fontDataProvider); 
    //创建AttributeString
    attrString=[[NSMutableAttributedString alloc]initWithString:self.text];
    //设置字体及大小
    //CTFontRef helveticaBold = CTFontCreateWithName((__bridge CFStringRef)_fontName,_fontSize,NULL);
    [attrString addAttribute:(id)kCTFontAttributeName value:(__bridge id)theCTFont range:NSMakeRange(0,[attrString length])];

不过有个奇怪的问题， CFRelease(theCGFont);不起作用，而且貌似这个问题只发生在中文字体上（非英文字体更准确一点？)