ios - 如何将项目追加到表格或 Collection View 的底部？

Question

我有一个快速的 TableView / Collection View 。无论如何，我可以将项目附加到容器的末尾吗？比如颠倒的堆栈之类的？

Answer 1

您需要在 UITableView 和 Collection View 中插入行，因为首先需要在您的数据源中插入行。对于 TableView

//Update data source with the object that you need to add
[tableDataSource addObject:newObject];

NSInteger row = [tableDataSource count]-1 ;//specify a row where you need to add new row in your case last
NSInteger section = //specify the section where the new row to be added, 
//section = 0 here since you need to add row at first section

NSIndexPath *indexPath = [NSIndexPath indexPathForRow:row inSection:section];
[self.tableView beginUpdates];
[self.tableView insertRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationRight];
[self.tableView endUpdates];

对于 Collection View

    [self.myCollectionView performBatchUpdates:^{
[collectionDataSource addObject:newObject];
NSInteger row = [collectionDataSource count]-1 ;//specify a row where you need to add new row in your case last
             to add new row in your case last
    NSInteger section = //specify the section where the new row to be added, 
    //section = 0 here since you need to add row at first section

    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:row inSection:section];
            [self.myCollectionView insertItemsAtIndexPath: indexPath];
        } completion:nil];