升级Xcode 9 + iOS 11后,发现本来没问题的collectionView和tableView像是中了风同样,头部刷新UI出现了错乱。
查阅发现 iOS11弃用了automaticallyAdjustsScrollViewInsets
属性,新增contentInsetAdjustmentBehavior
来替代它git
关于 contentInsetAdjustmentBehavior
github
@available(iOS 11.0, *) public enum UIScrollViewContentInsetAdjustmentBehavior : Int { case automatic // 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 case scrollableAxes // Edges for scrollable axes are adjusted (i.e., contentSize.width/height > frame.size.width/height or alwaysBounceHorizontal/Vertical = YES) case never // contentInset is not adjusted case always // contentInset is always adjusted by the scroll view's safeAreaInsets }
UIScrollViewContentInsetAdjustmentBehavior 是一个枚举类型,值有如下几种:swift
-automatic
和scrollableAxes同样,scrollView会自动计算和适应顶部和底部的内边距而且在scrollView 不可滚动时,也会设置内边距.
-scrollableAxes
自动计算内边距.
-never
不计算内边距
-always
根据safeAreaInsets 计算内边距app
很显然,咱们这里要设置为 never
less
if (@available(iOS 11.0, *)){ _tableView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever; _tableView.contentInset = UIEdgeInsetsMake(0, 0, 49, 0);//导航栏若是使用系统原生半透明的,top设置为64 _tableView.scrollIndicatorInsets = _tableView.contentInset; }
if #available(iOS 11.0, *) { tableView.contentInsetAdjustmentBehavior = .never tableView.contentInset = UIEdgeInsetsMake(0, 0, 49, 0)//导航栏若是使用系统原生半透明的,top设置为64 tableView.scrollIndicatorInsets = tableView.contentInset }
凡是Scrollview 及 Scrollview子类都会有适配问题,整个工程使用了无数Scrollview的你心理阴影面积必定不小,别担忧,其实能够一行代码解决问题:ide
// AppDelegate 进行全局设置 if (@available(iOS 11.0, *)){ [[UIScrollView appearance] setContentInsetAdjustmentBehavior:UIScrollViewContentInsetAdjustmentNever]; }
11.gifspa
更多代码可参考
https://github.com/XuYang8026/UniversalProjectcode
以上属于臭码农原创,如有雷同属巧合,若有错误望指正,转载请标明来源和做者。
by:臭码农get
做者:臭码农
连接:https://www.jianshu.com/p/a6e5cc20a008
來源:简书
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