更新ios未安装微信时，隐藏微信图标

lib/pages/login/login.dart

@@ -42,9 +42,9 @@ class _EPageState extends State<LoginPage> {
         debugPrint('is wechat installed: $isWeChatInstalled');
         if (!isWeChatInstalled) {
           // TODO ios未安装微信 隐藏微信一键登录按钮
-          loginController.model.isWeChatNotInstalled = false;
-        } else {
           loginController.model.isWeChatNotInstalled = true;
+        } else {
+          loginController.model.isWeChatNotInstalled = false;
         }
         loginController.updateAll();
       });