新增初始化默认股票符号的方法以优化数据请求逻辑

src/views/exchangeStock/index.vue

@@ -391,6 +391,17 @@
 		},
 
 		methods: {
+			initDefaultSymbol(marketList) {
+				if (this.symbol || !marketList || !marketList.length) return;
+				const firstGroup = marketList[0];
+				const first = firstGroup && firstGroup.marketInfoList && firstGroup.marketInfoList[0];
+				if (!first) return;
+				this.symbol = first.symbol;
+				this.findMarketBySymbol();
+				if (this.ws && this.ws.socket && this.ws.socket.readyState === WebSocket.OPEN) {
+					this.addSub();
+				}
+			},
 			ispopover1(item){
 			    this.symbol=item;
 			},
@@ -643,9 +654,9 @@
 
 							this.marketList = data;
 
-							if (!this.symbol) { // 默认symbol 重新请求数据
-								this.symbol = _.nth(data).marketInfoList[0].symbol;
-							} else { // 找出该symbol对应的记录并更新页面
+							if (!this.symbol) {
+								this.initDefaultSymbol(data);
+							} else {
 								this.findMarketBySymbol();
 							}
 
@@ -698,9 +709,7 @@
 			
 			Market.getstockMarketList().then(data => {
 			    this.marketList = data;
-				// if (!this.symbol) { // 默认symbol 重新请求数据
-				// 	this.symbol = _.nth(data).marketInfoList[0].symbol;
-				// } 
+				this.initDefaultSymbol(data);
 			}).catch(err => {});
 			// this.update();
 		},