群聊@功能（完成）

im-uniapp/pages/chat/chat-box.vue

@@ -179,10 +179,14 @@
 			createAtText() {
 				let atText = "";
 				this.atUserIds.forEach((id) => {
+					if(id==-1){
+						atText += ` @全体成员`;
+					}else{
 						let member = this.groupMembers.find((m)=>m.userId==id);
 						if (member) {
 							atText += ` @${member.aliasName}`;
 						}
+					}
 				})
 				return atText;
 			},