如何过滤UICollectionView并保持键盘？

问题描述

我已将 UISearchBar 添加到 UICollectionView ，并在委托 searchBar中添加： textDidChange：过滤我的模型并调用 [collectionView reloadData] 。 reloadData （以及reloadSection等）想要从搜索栏的文本字段中取走firstResponder，从而解雇键盘。

任何想法？

解决方案

在searchBar委托函数中，我使用performBatchUpdates，首先，重新加载collectionView然后调用[self.searchBar becomeFirstResponder]来显示键盘

   - （void）searchBarTextDidBeginEditing：（UISearchBar * ）searchBar {
 [self setEditing：NO animated：YES]; 
 [searchBar setShowsCancelButton：YES animated：YES]; 
 
 [self.collectionView performBatchUpdates：^ {
 [self.collectionView reloadData]; 
}完成：^（BOOL完成）{
 [self.searchBar becomeFirstResponder]; 
}]; 
} 
  

I've added a UISearchBar to a UICollectionView and in the delegate searchBar:textDidChange: filter my model and call [collectionView reloadData]. reloadData (as well as reloadSection, etc) wants to take away firstResponder from the searchbar's textfield, thus dismissing the keyboard.

I am trying to build a "live updating" filter and so it's annoying to have the keyboard go away after each character typed.

Any ideas?

解决方案

In searchBar delegate function , I use performBatchUpdates, first,reload collectionView then call [self.searchBar becomeFirstResponder] to display keyboard

- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar{
    [self setEditing:NO animated:YES];
    [searchBar setShowsCancelButton:YES animated:YES];

        [self.collectionView performBatchUpdates:^{
            [self.collectionView reloadData];
        } completion:^(BOOL finished) {
            [self.searchBar becomeFirstResponder];
        }];
}

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