fix: 切换时间周期不显示loading转圈

flutter_monisuo/build/web/flutter_bootstrap.js

@@ -37,6 +37,6 @@ _flutter.buildConfig = {"engineRevision":"e4b8dca3f1b4ede4c30371002441c88c12187e
 
 _flutter.loader.load({
   serviceWorkerSettings: {
-    serviceWorkerVersion: "1257193474" /* Flutter's service worker is deprecated and will be removed in a future Flutter release. */
+    serviceWorkerVersion: "2949537379" /* Flutter's service worker is deprecated and will be removed in a future Flutter release. */
   }
 });

flutter_monisuo/lib/providers/chart_provider.dart

@@ -121,7 +121,7 @@ class ChartProvider extends ChangeNotifier {
   void setSymbol(String symbol) {
     if (_symbol != symbol) {
       _symbol = symbol;
-      loadCandles();
+      loadCandles(); // 切换币种显示loading
     }
   }
 
@@ -129,7 +129,7 @@ class ChartProvider extends ChangeNotifier {
   void setInterval(ChartInterval interval) {
     if (_interval != interval) {
       _interval = interval;
-      loadCandles();
+      loadCandles(showLoading: false); // 切换时间周期不显示loading
     }
   }
 
@@ -140,10 +140,12 @@ class ChartProvider extends ChangeNotifier {
   }
 
   /// 加载 K 线数据
-  Future<void> loadCandles() async {
+  Future<void> loadCandles({bool showLoading = true}) async {
+    if (showLoading) {
       _loading = true;
       _error = null;
       notifyListeners();
+    }
 
     try {
       // TODO: 对接真实 API
@@ -153,13 +155,19 @@ class ChartProvider extends ChangeNotifier {
       // );
 
       // 临时使用模拟数据
-      await Future.delayed(const Duration(milliseconds: 500));
+      await Future.delayed(const Duration(milliseconds: 300));
       _candles = _generateMockCandles();
 
+      if (showLoading) {
         _loading = false;
         notifyListeners();
+      } else {
+        notifyListeners();
+      }
     } catch (e) {
+      if (showLoading) {
         _loading = false;
+      }
       _error = e.toString();
       notifyListeners();
     }