上传中文字符到服务器的编码转换的解决方法

NSString *utf8= (NSString *)CFURLCreateStringByAddingPercentEscapes(NULL,
                                                                       (CFStringRef)name.text, 
                                                                       NULL,
                                                                       (CFStringRef)@"!*'$, %#[]", 
                                                                       kCFStringEncodingUTF8);

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