1、搜索appbar设置foregroundColor

lib/widget/search_app_bar.dart

@@ -10,6 +10,7 @@ class SearchAppBar extends StatefulWidget implements PreferredSizeWidget {
   final String? hintText;
   final Widget? leading;
   final Color? backgroundColor;
+  final Color? foregroundColor;
   final bool primary;
   final Color? searchBackgroundColor;
   final Color? inputTextColor;
@@ -25,6 +26,7 @@ class SearchAppBar extends StatefulWidget implements PreferredSizeWidget {
     this.hintText = "请输入搜索内容",
     this.leading,
     this.backgroundColor,
+    this.foregroundColor,
     this.primary = true,
     this.searchBackgroundColor,
     this.inputTextColor,
@@ -64,6 +66,7 @@ class _SearchAppBarState extends State<SearchAppBar> {
       tapOutsideBehavior: TapOutsideBehavior.opaqueDismiss,
       child: AppBar(
         backgroundColor: widget.backgroundColor,
+        foregroundColor: widget.foregroundColor,
         titleSpacing: 0.0,
         primary: widget.primary,
         leading: widget.leading,