添加默认选择支付金额

src/pages/pay/pay.tsx

@@ -86,6 +86,17 @@ class Pay extends Component {
     };
     this.checkBluetoothAndWs();
   }
+
+  componentWillMount() {
+    const { prepayConfig } = this.props;
+
+    if (prepayConfig.length) {
+      this.setState({
+        payId: prepayConfig[0].id,
+      });
+    }
+  }
+
   componentWillUnmount() {
     // this.closeBluetooth();
     // this.closeDeviceSocket();