自定义消息的@消息的编解码
编码参考：
- (NSData *)encode {
NSMutableDictionary *dataDict = [NSMutableDictionary dictionary];
[dataDict setObject:self.content forKey:@“content”];
if (self.extra) {
[dataDict setObject:self.extra forKey:@“extra”];
}
if (self.mentionedInfo) {
NSDictionary *mentionDic = [self encodeMentionedInfo:self.mentionedInfo];//此方法在父类RCMessageContent中已经实现，直接调用即可
[dataDict setObject:mentionDic forKey:@“mentionedInfo”];
}
NSData *data = [NSJSONSerialization dataWithJSONObject:dataDict
options:kNilOptions
error:nil];
return data;
}
解码参考：
- (void)decodeWithData:(NSData *)data {
__autoreleasing NSError *__error = nil;
if (!data) {
return;
}
NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:data
options:kNilOptions
error:&__error];
RCDictionary *json = [[RCDictionary alloc] initWithDictionary:dictionary];
if (json) {
self.content = [json stringObjectForKey:@“content”];
self.extra = [json stringObjectForKey:@“extra”];
NSDictionary *mentionedInfoDic = [json objectForKey:@“mentionedInfo”];
[self decodeMentionedInfo:mentionedInfoDic];//此方法在父类RCMessageContent中已经实现，直接调用即可
}
}