[iOS] Forbid adjustment of safeArea by system for cycle slider component. (#1780)

diff --git a/ios/sdk/WeexSDK/Sources/Component/WXCycleSliderComponent.mm b/ios/sdk/WeexSDK/Sources/Component/WXCycleSliderComponent.mm
index 402e592..ab26bc3 100644
--- a/ios/sdk/WeexSDK/Sources/Component/WXCycleSliderComponent.mm
+++ b/ios/sdk/WeexSDK/Sources/Component/WXCycleSliderComponent.mm
@@ -73,6 +73,9 @@
         _currentIndex = 0;
         _itemViews = [[NSMutableArray alloc] init];
         _scrollView = [[WXRecycleSliderScrollView alloc] init];
+        if (@available(iOS 11.0, *)) {
+            _scrollView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
+        }
         _scrollView.backgroundColor = [UIColor clearColor];
         _scrollView.delegate = self;
         _scrollView.showsHorizontalScrollIndicator = NO;