我有一个创建CFAttributedStringRef的obj-c类:-(CFAttributedStringRef)createAttributedStringWithByteRange:(NSRange)byteRange{UInt8bytes[byteRange.length];[self.datagetBytes:&bytesrange:byteRange];CFStringRefstring=CFStringCreateWithBytes(NULL,bytes,byteRange.length,kCFStringEncodingUTF8,(byteRange.location