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/QNSingleFlight.m

@@ -0,0 +1,112 @@
+//
+//  QNSingleFlight.m
+//  QiniuSDK
+//
+//  Created by yangsen on 2021/1/4.
+//  Copyright © 2021 Qiniu. All rights reserved.
+//
+
+#import "QNDefine.h"
+#import "QNSingleFlight.h"
+
+@interface QNSingleFlightTask : NSObject
+@property(nonatomic,  copy)QNSingleFlightComplete complete;
+@end
+@implementation QNSingleFlightTask
+@end
+
+@interface QNSingleFlightCall : NSObject
+@property(nonatomic, assign)BOOL isComplete;
+@property(nonatomic, strong)NSMutableArray <QNSingleFlightTask *> *tasks;
+@property(nonatomic, strong)id value;
+@property(nonatomic, strong)NSError *error;
+@end
+@implementation QNSingleFlightCall
+@end
+
+@interface QNSingleFlight()
+@property(nonatomic, strong)NSMutableDictionary <NSString *, QNSingleFlightCall *> *callInfo;
+@end
+@implementation QNSingleFlight
+
+- (void)perform:(NSString * _Nullable)key
+         action:(QNSingleFlightAction _Nonnull)action
+       complete:(QNSingleFlightComplete _Nullable)complete {
+    if (!action) {
+        return;
+    }
+
+    BOOL isFirstTask = false;
+    BOOL shouldComplete = false;
+    QNSingleFlightCall *call = nil;
+    @synchronized (self) {
+        if (!self.callInfo) {
+            self.callInfo = [NSMutableDictionary dictionary];
+        }
+        
+        if (key) {
+            call = self.callInfo[key];
+        }
+        
+        if (!call) {
+            call = [[QNSingleFlightCall alloc] init];
+            call.isComplete = false;
+            call.tasks = [NSMutableArray array];
+            if (key) {
+                self.callInfo[key] = call;
+            }
+            isFirstTask = true;
+        }
+        
+        @synchronized (call) {
+            shouldComplete = call.isComplete;
+            if (!shouldComplete) {
+                QNSingleFlightTask *task = [[QNSingleFlightTask alloc] init];
+                task.complete = complete;
+                [call.tasks addObject:task];
+            }
+        }
+    }
+    
+    if (shouldComplete) {
+        if (complete) {
+            complete(call.value, call.error);
+        }
+        return;
+    }
+    if (!isFirstTask) {
+        return;
+    }
+    
+    kQNWeakSelf;
+    kQNWeakObj(call);
+    action(^(id value, NSError *error){
+        kQNStrongSelf;
+        kQNStrongObj(call);
+        
+        NSArray *tasksP = nil;
+        @synchronized (call) {
+            if (call.isComplete) {
+                return;
+            }
+            call.isComplete = true;
+            call.value = value;
+            call.error = error;
+            tasksP = [call.tasks copy];
+        }
+        
+        if (key) {
+            @synchronized (self) {
+                [self.callInfo removeObjectForKey:key];
+            }
+        }
+        
+        for (QNSingleFlightTask *task in tasksP) {
+            if (task.complete) {
+                task.complete(value, error);
+            }
+        }
+    });
+}
+
+@end