UIScrollView

UIScrollView新增contentInsetAdjustmentBehavior代替automaticallyAdjustsScrollViewInsets

• automaticallyAdjustsScrollViewInsets:系统会根据所在界面的statusbar, searchbar, navigationbar等自动调整ScrollView的inset.

typedef NS_ENUM(NSInteger, UIScrollViewContentInsetAdjustmentBehavior) {    UIScrollViewContentInsetAdjustmentAutomatic, // Similar to .scrollableAxes, but for backward compatibility will also adjust the top & bottom contentInset when the scroll view is owned by a view controller with automaticallyAdjustsScrollViewInsets = 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));

修复方法

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

Tableview

在iOS8引入Self-Sizing之后,我们可以通过实现estimatedRowHeight相关的属性来展示动态的内容.**Self-Sizing在iOS11下是默认开启的，Headers, Headers, and cells都默认开启Self-Sizing，所有estimated 高度默认值从iOS11之前的 0 改变为UITableViewAutomaticDimension.**如果目前项目中没有使用estimateRowHeight属性，在iOS11的环境下就要注意了，因为开启Self-Sizing之后，tableView是使用estimateRowHeight属性的,就会可能会使代理方法设置高度失效.

可以通过下面方法关闭

self.tableView.estimatedRowHeight = 0;self.tableView.estimatedSectionHeaderHeight = 0;self.tableView.estimatedSectionFooterHeight = 0;

参考