之前写过类似微信的语音功能，这里用到了json解析与创建
+ (NSString *)voiceMessageConentWithEntity:(VMessageEntity *)entity{
NSLog(@"entity.voiceMessage.voicemd5 == %@",entity.voiceMessage.voicemd5);
if (!entity) {
return
nil;
}
VChatVoiceEntity *voiceMessage = entity.voiceMessage;
if (!voiceMessage) {
return
nil;
}
NSString *voicemd5 = voiceMessage.voicemd5;
NSString *duration = voiceMessage.duration;
if (entity.messageType ==
VMessageTypeVoice) {
NSMutableDictionary *rootDict = [NSMutableDictionary
dictionary];
if (voicemd5) {
[rootDict setObject:voicemd5
forKey:@"md5"];
}
if (duration) {
[rootDict setObject:duration
forKey:@"duration"];
}
NSError *error =
nil;
NSData *jsonData = [NSJSONSerialization
dataWithJSONObject:rootDict
options:NSJSONWritingPrettyPrinted
error:&error];
if (error) {
NSLog(@"%@", error);
}
NSString *json = [[NSString
alloc] initWithData:jsonData
encoding:NSUTF8StringEncoding];
return json;
}else{
return
nil;
}
}
+ (VChatVoiceEntity *)voiceWithJson:(NSString *)json{
if (!json.length) {
return
nil;
}
NSData *jsonData = [json
dataUsingEncoding:NSUTF8StringEncoding];
NSError *error =
nil;
NSDictionary *root = [NSJSONSerialization
JSONObjectWithData:jsonData
options:NSJSONReadingMutableLeaves
error:&error];
if (root) {
VChatVoiceEntity *voiceMessage = [[VChatVoiceEntity
alloc] init];
voiceMessage.voicemd5 = [root
objectForKey:@"md5"];
voiceMessage.duration = [root
objectForKey:@"duration"];
return voiceMessage;
}
return
nil;
}