ios - iOS 11透明导航栏

创建透明的导航栏不再适用于ios 11。
我在顶部得到了这个黑色的栏，因为表格 View 不再位于该栏的下方( Storyboard 中的插图已正确设置为从0开始)
有什么想法吗？

self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for: UIBarMetrics.default)
self.navigationController?.navigationBar.shadowImage = UIImage()
self.navigationController?.navigationBar.isTranslucent = true

最佳答案

老的:

如果您使用过tableView，请添加代码:

if (@available(iOS 11.0, *)) {
    self.tableView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever
} else {
    self.automaticallyAdjustsScrollViewInsets = NO
}

新的:

iOS11中对automaticAdjustsScrollViewInsets的更改:

@property(nonatomic,assign) BOOL automaticallyAdjustsScrollViewInsets
API_DEPRECATED_WITH_REPLACEMENT("Use UIScrollView's
contentInsetAdjustmentBehavior instead", ios(7.0,11.0),tvos(7.0,11.0));
// Defaults to YES

关于contentInsetAdjustmentBehavior:

typedef NS_ENUM(NSInteger, UIScrollViewContentInsetAdjustmentBehavior) {
    UIScrollViewContentInsetAdjustmentAutomatic, // Similar to .scrollableAxes, but will also adjust the top & bottom contentInset when the scroll view is owned by a view controller with automaticallyAdjustsScrollViewContentInset = YES inside a navigation controller, regardless of whether the scroll view is scrollable
    UIScrollViewContentInsetAdjustmentScrollableAxes, // Edges for scrollable axes are adjusted (i.e., contentSize.width/height > frame.size.width/height or alwaysBounceHorizontal/Vertical = YES)
    UIScrollViewContentInsetAdjustmentNever, // contentInset is not adjusted
    UIScrollViewContentInsetAdjustmentAlways, // contentInset is always adjusted by the scroll view's safeAreaInsets
} API_AVAILABLE(ios(11.0),tvos(11.0));

/* Configure the behavior of adjustedContentInset.
 Default is UIScrollViewContentInsetAdjustmentAutomatic.
 */
@property(nonatomic) UIScrollViewContentInsetAdjustmentBehavior contentInsetAdjustmentBehavior API_AVAILABLE(ios(11.0),tvos(11.0));

这可能是iOS11的safeArea问题。
请一位专家尝试以下定义:

#define  adjustsScrollViewInsets_NO(scrollView,vc)\
do { \
    _Pragma("clang diagnostic push") \
    _Pragma("clang diagnostic ignored \"-Warc-performSelector-leaks\"") \
        if ([UIScrollView instancesRespondToSelector:NSSelectorFromString(@"setContentInsetAdjustmentBehavior:")]) {\
            [scrollView   performSelector:NSSelectorFromString(@"setContentInsetAdjustmentBehavior:") withObject:@(2)];\
        } else {\
            vc.automaticallyAdjustsScrollViewInsets = NO;\
        }\
    _Pragma("clang diagnostic pop") \
} while (0)