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/Http/Dns/QNDnsCacheInfo.m

@@ -0,0 +1,58 @@
+//
+//  QNDnsCacheKey.m
+//  QnDNS
+//
+//  Created by yangsen on 2020/3/26.
+//  Copyright © 2020 com.qiniu. All rights reserved.
+//
+
+#import "QNDnsCacheInfo.h"
+
+@interface QNDnsCacheInfo()
+/// 缓存时间戳
+@property(nonatomic,  copy)NSString *currentTime;
+/// 缓存时本地IP
+@property(nonatomic,  copy)NSString *localIp;
+/// 缓存信息
+@property(nonatomic,  copy)NSDictionary *info;
+@end
+@implementation QNDnsCacheInfo
+
++ (instancetype)dnsCacheInfo:(NSData *)jsonData{
+    NSDictionary *info = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableLeaves error:nil];
+    if (!info || info.count == 0 ||
+        (!info[@"currentTime"] && !info[@"localIp"] && !info[@"info"])) {
+        return nil;
+    }
+    return [QNDnsCacheInfo dnsCacheInfo:info[@"currentTime"]
+                                localIp:info[@"localIp"]
+                                   info:info[@"info"]];;
+}
+
++ (instancetype)dnsCacheInfo:(NSString *)currentTime
+                     localIp:(NSString *)localIp
+                        info:(NSDictionary *)info{
+    
+    QNDnsCacheInfo *cacheInfo = [[QNDnsCacheInfo alloc] init];
+    cacheInfo.currentTime = currentTime;
+    cacheInfo.localIp = localIp;
+    cacheInfo.info = info;
+    return cacheInfo;
+}
+
+- (NSData *)jsonData{
+    NSMutableDictionary *cacheInfo = [NSMutableDictionary dictionary];
+    if (self.currentTime) {
+        cacheInfo[@"currentTime"] = self.currentTime;
+    }
+    if (self.localIp) {
+        cacheInfo[@"localIp"] = self.localIp;
+    }
+    if (self.info) {
+        cacheInfo[@"info"] = self.info;
+    }
+    return [NSJSONSerialization dataWithJSONObject:cacheInfo options:NSJSONWritingPrettyPrinted error:nil];
+}
+
+
+@end