解决了语音上传到问题，接下来要解决下载播放问题

Pods/Qiniu/QiniuSDK/Utils/QNCrc32.m

@@ -0,0 +1,45 @@
+//
+//  QNCrc.m
+//  QiniuSDK
+//
+//  Created by bailong on 14-9-29.
+//  Copyright (c) 2014年 Qiniu. All rights reserved.
+//
+
+#import <zlib.h>
+
+#import "QNConfiguration.h"
+#import "QNCrc32.h"
+
+@implementation QNCrc32
+
++ (UInt32)data:(NSData *)data {
+    uLong crc = crc32(0L, Z_NULL, 0);
+
+    crc = crc32(crc, [data bytes], (uInt)[data length]);
+    return (UInt32)crc;
+}
+
++ (UInt32)file:(NSString *)filePath
+         error:(NSError **)error {
+    @autoreleasepool {
+        NSData *data = [NSData dataWithContentsOfFile:filePath options:NSDataReadingMappedIfSafe error:error];
+        if (*error != nil) {
+            return 0;
+        }
+
+        int len = (int)[data length];
+        int count = (len + kQNBlockSize - 1) / kQNBlockSize;
+
+        uLong crc = crc32(0L, Z_NULL, 0);
+        for (int i = 0; i < count; i++) {
+            int offset = i * kQNBlockSize;
+            int size = (len - offset) > kQNBlockSize ? kQNBlockSize : (len - offset);
+            NSData *d = [data subdataWithRange:NSMakeRange(offset, (unsigned int)size)];
+            crc = crc32(crc, [d bytes], (uInt)[d length]);
+        }
+        return (UInt32)crc;
+    }
+}
+
+@end