UITableView was told to layout its visible cells and other contents without being in the view hierar

迈不过友情╰ 2024-05-03 14:39 51阅读 0赞

**\[TableView\] Warning once only: UITableView was told to layout its visible cells and other contents without being in the view hierarchy (the table view or one of its superviews has not been added to a window). This may cause bugs by forcing views inside the table view to load and perform layout without accurate information (e.g. table view bounds, trait collection, layout margins, safe area insets, etc), and will also cause unnecessary performance overhead due to extra layout passes. Make a symbolic breakpoint at UITableViewAlertForLayoutOutsideViewHierarchy to catch this in the debugger and see what caused this to occur, so you can avoid this action altogether if possible, or defer it until the table view has been added to a window. Table view: <UITableView: 0x159010800; frame = (0 0; 414 896); clipsToBounds = YES; autoresize = W+H; gestureRecognizers = <NSArray: 0x2802ddc80>; layer = <CALayer: 0x280cb5340>; contentOffset: \{0, -88\}; contentSize: \{414, 1392\}; adjustedContentInset: \{88, 0, 34, 0\}; dataSource: <\_UIFilteredDataSource: 0x2802d06c0>>**

**可能是子线程中更新UI导致的。**

**修改方法：**

**1.**

dispatch\_async(dispatch\_get\_main\_queue(), ^\{

// 执行的方法

\});

如果代理的方法是自定义的，可能还是会出现这个问题。

\- (void)tableViewController:(MYTreeTableViewController \*)tableViewController didSelectRowAtIndexPath:(NSIndexPath \*)indexPath \{

将方法内容写到系统方法中，就不会有这个问题了。

如果自定义的代理方法不是系统方法，想办法让系统方法先执行处理，然后再回调。