diff --git a/Ifish/Utinitys/IfishUtils/UINavigationBar+Background.m b/Ifish/Utinitys/IfishUtils/UINavigationBar+Background.m
index bb1848d..e968ad8 100755
--- a/Ifish/Utinitys/IfishUtils/UINavigationBar+Background.m
+++ b/Ifish/Utinitys/IfishUtils/UINavigationBar+Background.m
@@ -26,6 +26,11 @@ static char overlayKey;
     if (!self.overlay) {
         [self setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
         self.overlay = [[UIView alloc] initWithFrame:CGRectMake(0, -20, [UIScreen mainScreen].bounds.size.width, CGRectGetHeight(self.bounds) + 20)];
+        if (@available(iOS 11.0, *)) {
+            self.overlay = [[UIView alloc] initWithFrame:CGRectMake(0, -44, [UIScreen mainScreen].bounds.size.width, CGRectGetHeight(self.bounds) + 44)];
+        } else {
+            self.overlay = [[UIView alloc] initWithFrame:CGRectMake(0, -20, [UIScreen mainScreen].bounds.size.width, CGRectGetHeight(self.bounds) + 20)];
+        }
         self.overlay.userInteractionEnabled = NO;
         self.overlay.autoresizingMask = UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight;
         [self insertSubview:self.overlay atIndex:0];