背景
在集成融云 SDK 后，须要实现群组操作的音讯告诉。包含：
- 群创立、销毁告诉
- 群布告告诉
- 群人员退出、退出告诉
- 群昵称批改告诉
- ...
融云现有的 SDK 仅提供了 RCGroupNotificationMessage，外部封装了几种简略的类型操作，且扩展性不强，无奈实现现有的操作。
解决方案：
应用自定义音讯从新来构建群组告诉音讯。
参考 sealtlak 中的 RCDGroupNotificationMessage，也是独自对群组操作内容，从新进行了封装解决。
/*! 群组告诉音讯 */@interface RCDGroupNotificationMessage : RCMessageContent//操作名@property (nonatomic, copy) NSString *operation;//操作人@property (nonatomic, copy) NSString *operatorUserId;//操作对象@property (nonatomic, strong) NSArray<NSString *> *targetUserIds;//内容@property (nonatomic, copy) NSString *message;//获取摘要- (NSString *)getDigest:(NSString *)groupId;@end这个类预约义了上面几种操作类型音讯,具体内容可参考名字定义
extern NSString *const RCDGroupCreate;extern NSString *const RCDGroupMemberAdd;extern NSString *const RCDGroupMemberQuit;extern NSString *const RCDGroupMemberKicked;extern NSString *const RCDGroupRename;extern NSString *const RCDGroupBulletin;extern NSString *const RCDGroupOwnerTransfer;extern NSString *const RCDGroupDismiss;extern NSString *const RCDGroupMemberJoin;extern NSString *const RCDGroupMemberManagerSet;extern NSString *const RCDGroupMemberManagerRemove;extern NSString *const RCDGroupMemberProtectionOpen;extern NSString *const RCDGroupMemberProtectionClose;.m 的实现还是依照自定义音讯的实现进行解决。惟一有区别的是在获取摘要的办法，在这个办法中对音讯内容进行了解决，依据操作名的不同，来对显示的内容进行各种适配。此处依据依据本人的业务进行批改。
- (NSString *)getDigest:(NSString *)groupId { NSString *content; //获取用户信息 NSString *operationName = [self getDisplayNames:@[ self.operatorUserId?self.operatorUserId:@""] groupId:groupId]; NSString *targetNames = [self getDisplayNames:self.targetUserIds groupId:groupId]; //是否以后用户操作 BOOL isMeOperate = NO; if ([self.operatorUserId isEqualToString:[RCIMClient sharedRCIMClient].currentUserInfo.userId]) { isMeOperate = YES; } //判断操作类型 if ([self.operation isEqualToString:RCDGroupCreate]) { content = [NSString stringWithFormat:NSLocalizedStringFromTable(isMeOperate ? @"GroupHaveCreated" : @"GroupCreated", @"RongCloudKit", nil), operationName]; } else if ([self.operation isEqualToString:RCDGroupMemberAdd]) { if (self.targetUserIds.count == 1 && [self.targetUserIds containsObject:self.operatorUserId]) { content = [NSString stringWithFormat:NSLocalizedStringFromTable(@"GroupJoin", @"RongCloudKit", nil), operationName]; } else { content = [NSString stringWithFormat:NSLocalizedStringFromTable(isMeOperate ? @"GroupHaveInvited" : @"GroupInvited", @"RongCloudKit", nil), operationName, targetNames]; } } else if ([self.operation isEqualToString:RCDGroupMemberJoin]) { content = [NSString stringWithFormat:NSLocalizedStringFromTable(@"GroupJoin", @"RongCloudKit", nil), operationName]; } else if ([self.operation isEqualToString:RCDGroupMemberQuit]) { content = [NSString stringWithFormat:NSLocalizedStringFromTable(isMeOperate ? @"GroupHaveQuit" : @"GroupQuit", @"RongCloudKit", nil), operationName]; } else if ([self.operation isEqualToString:RCDGroupMemberKicked]) { content = [NSString stringWithFormat:NSLocalizedStringFromTable(isMeOperate ? @"GroupHaveRemoved" : @"GroupRemoved", @"RongCloudKit", nil), operationName, targetNames]; } else if ([self.operation isEqualToString:RCDGroupRename]) { content = [NSString stringWithFormat:NSLocalizedStringFromTable(@"GroupChanged", @"RongCloudKit", nil), operationName, self.targetGroupName]; } else if ([self.operation isEqualToString:RCDGroupDismiss]) { content = [NSString stringWithFormat:NSLocalizedStringFromTable(isMeOperate ? @"GroupHaveDismiss" : @"GroupDismiss", @"RongCloudKit", nil), operationName]; } else if ([self.operation isEqualToString:RCDGroupOwnerTransfer]) { content = [NSString stringWithFormat:RCDLocalizedString(@"GroupHasNewOwner"), targetNames]; } else if ([self.operation isEqualToString:RCDGroupMemberManagerSet]) { content = [NSString stringWithFormat:RCDLocalizedString(@"GroupSetManagerMessage"), targetNames]; } else if ([self.operation isEqualToString:RCDGroupMemberProtectionOpen]) { content = RCDLocalizedString(@"openMemberProtection"); } else if ([self.operation isEqualToString:RCDGroupMemberProtectionClose]) { content = [NSString stringWithFormat:RCDLocalizedString(@"closeMemberProtection"), operationName]; } else { content = NSLocalizedStringFromTable(@"unknown_message_cell_tip", @"RongCloudKit", nil); } return content;}此外，还有一个获取名称的办法，用来保护用户信息。
- (NSString *)getDisplayNames:(NSArray<NSString *> *)userIds groupId:(NSString *)groupId