更新

app/middleware/AllowCrossDomain.php

@@ -12,7 +12,6 @@ namespace app\middleware;
 
 use think\Config;
 use think\Request;
-use think\Response;
 
 class AllowCrossDomain{
 
@@ -36,6 +35,7 @@ class AllowCrossDomain{
 	 * @return Response
 	 */
 	public function handle($request, \Closure $next, ? array $header = []){
+		$response = $next($request);
 		$header = !empty($header) ? array_merge($this->header, $header) : $this->header;
 
 		if (!isset($header['Access-Control-Allow-Origin'])) {
@@ -43,6 +43,10 @@ class AllowCrossDomain{
 			$header['Access-Control-Allow-Origin'] = $origin ? $origin : "*";
 		}
 
-		return $next($request)->header($header);
+		if (strtoupper($request->method()) == "OPTIONS") {
+			$response->code(204);
+		}
+
+		return $response->header($header);
 	}
 }