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/QNFile.m

@@ -0,0 +1,128 @@
+//
+//  QNFile.m
+//  QiniuSDK
+//
+//  Created by bailong on 15/7/25.
+//  Copyright (c) 2015年 Qiniu. All rights reserved.
+//
+
+#import "QNFile.h"
+#import "QNResponseInfo.h"
+
+@interface QNFile ()
+
+@property (nonatomic, readonly) NSString *filepath;
+
+@property (nonatomic) NSData *data;
+
+@property (readonly) int64_t fileSize;
+
+@property (readonly) int64_t fileModifyTime;
+
+@property (nonatomic) NSFileHandle *file;
+
+@property (nonatomic) NSLock *lock;
+
+@end
+
+@implementation QNFile
+
+- (instancetype)init:(NSString *)path
+               error:(NSError *__autoreleasing *)error {
+    if (self = [super init]) {
+        _filepath = path;
+        NSError *error2 = nil;
+        NSDictionary *fileAttr = [[NSFileManager defaultManager] attributesOfItemAtPath:path error:&error2];
+        if (error2 != nil) {
+            if (error != nil) {
+                *error = error2;
+            }
+            return self;
+        }
+        _fileSize = [fileAttr fileSize];
+        NSDate *modifyTime = fileAttr[NSFileModificationDate];
+        int64_t t = 0;
+        if (modifyTime != nil) {
+            t = [modifyTime timeIntervalSince1970];
+        }
+        _fileModifyTime = t;
+        NSFileHandle *f = nil;
+        NSData *d = nil;
+        //[NSData dataWithContentsOfFile:filePath options:NSDataReadingMappedIfSafe error:&error] 不能用在大于 200M的文件上，改用filehandle
+        // 参见 https://issues.apache.org/jira/browse/CB-5790
+        if (_fileSize > 16 * 1024 * 1024) {
+            f = [NSFileHandle fileHandleForReadingAtPath:path];
+            if (f == nil) {
+                if (error != nil) {
+                    *error = [[NSError alloc] initWithDomain:path code:kQNFileError userInfo:nil];
+                }
+                return self;
+            }
+        } else {
+            d = [NSData dataWithContentsOfFile:path options:NSDataReadingMappedIfSafe error:&error2];
+            if (error2 != nil) {
+                if (error != nil) {
+                    *error = error2;
+                }
+                return self;
+            }
+        }
+        _file = f;
+        _data = d;
+        _lock = [[NSLock alloc] init];
+    }
+
+    return self;
+}
+
+- (NSData *)read:(long long)offset
+            size:(long)size
+           error:(NSError **)error {
+
+    NSData *data = nil;
+    @try {
+        [_lock lock];
+        if (_data != nil && offset < _data.length) {
+            NSUInteger realSize = MIN((NSUInteger)size, _data.length - ((NSUInteger)offset));
+            data = [_data subdataWithRange:NSMakeRange((NSUInteger)offset, realSize)];
+        } else if (_file != nil && offset < _fileSize) {
+            [_file seekToFileOffset:offset];
+            data = [_file readDataOfLength:size];
+        } else {
+            data = [NSData data];
+        }
+    } @catch (NSException *exception) {
+        *error = [NSError errorWithDomain:NSCocoaErrorDomain code:kQNFileError userInfo:@{NSLocalizedDescriptionKey : exception.reason}];
+        NSLog(@"read file failed reason: %@ \n%@", exception.reason, exception.callStackSymbols);
+    } @finally {
+        [_lock unlock];
+    }
+    return data;
+}
+
+- (NSData *)readAllWithError:(NSError **)error {
+    return [self read:0 size:(long)_fileSize error:error];
+}
+
+- (void)close {
+    if (_file != nil) {
+        [_file closeFile];
+    }
+}
+
+- (NSString *)path {
+    return _filepath;
+}
+
+- (int64_t)modifyTime {
+    return _fileModifyTime;
+}
+
+- (int64_t)size {
+    return _fileSize;
+}
+
+- (NSString *)fileType {
+    return @"File";
+}
+@end