一堆乱七八糟的修改

播放页面增加桌面版

lib/shared/utils/helper.dart

@@ -0,0 +1,40 @@
+import 'dart:io';
+
+import 'package:flutter/foundation.dart';
+
+class Helper {
+  static isAndroid() {
+    return !kIsWeb && Platform.isAndroid;
+  }
+
+  static isIOS() {
+    return !kIsWeb && Platform.isIOS;
+  }
+
+  static isMobile() {
+    return !kIsWeb && (Platform.isAndroid || Platform.isIOS);
+  }
+
+  static isDesktop() {
+    if (kIsWeb) {
+      return false;
+    }
+    return Platform.isWindows || Platform.isLinux || Platform.isMacOS;
+  }
+
+  static isWindows() {
+    return !kIsWeb && Platform.isWindows;
+  }
+
+  static isMacos() {
+    return !kIsWeb && Platform.isMacOS;
+  }
+
+  static isLinux() {
+    return !kIsWeb && Platform.isLinux;
+  }
+
+  static isWeb() {
+    return kIsWeb;
+  }
+}