diff --git a/CYLTabBarController/CYLTabBarController.m b/CYLTabBarController/CYLTabBarController.m
index 9f511ec..4d17ba3 100644
--- a/CYLTabBarController/CYLTabBarController.m
+++ b/CYLTabBarController/CYLTabBarController.m
@@ -749,7 +749,10 @@ - (void)cyl_setTabBarController:(CYLTabBarController *)tabBarController {
 
 static inline UIWindow *getMainWindow(){
    UIWindow *window = nil;
-    window = UIApplication.sharedApplication.delegate.window;
+    if ([UIApplication.sharedApplication.delegate respondsToSelector:@selector(window)]) {
+        //兼容新版项目结构，也就是AppDelegate没有window的情况
+        window = UIApplication.sharedApplication.delegate.window;
+    }
     if (!window) {
         if (@available(iOS 13.0, *))
            {