(fix)水位趋势预测图不显示

super-screen/client/src/sections/water-prevention/containers/homePage.js

@@ -86,7 +86,7 @@ function homePage(props) {
                     if (item.alert && item.futureData && item.futureData.length != 0) {
                         item.futureData.map((futureItem) => {
                             if (futureItem.value >= alert) {
-                                futureState = `超警戒，预计${item.forecast_time}时水位抵达${(item.value).toFixed(2)}m`
+                                futureState = `超警戒，预计${item.forecast_time}时水位抵达${(item.value)?.toFixed(2)}m`
                             }
                         })
                         futureState = futureState != '' ? futureState : '正常'