解决了语音上传到问题，接下来要解决下载播放问题

Pods/HappyDNS/HappyDNS/Util/QNHex.h

@@ -0,0 +1,21 @@
+//
+//  QNHex.h
+//  HappyDNS
+//
+//  Created by bailong on 15/7/31.
+//  Copyright (c) 2015年 Qiniu Cloud Storage. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+char *qn_encodeHexData(char *output_buf, const char *data, int data_size, BOOL up);
+
+@interface QNHex : NSObject
+
++ (NSString *)encodeHexData:(NSData *)data;
++ (NSString *)encodeHexString:(NSString *)str;
+
++ (NSData *)decodeHexString:(NSString *)hex;
++ (NSString *)decodeHexToString:(NSString *)hex;
+
+@end