ios6 - UICollectionViewController 编辑

Question

我可以使用 self.navigationItem.leftBarButtonItem = self.editButtonItem; 通过按下导航面板上的编辑按钮让 UITableViewController 处于可编辑状态。

如何为 UICollectionViewController 实现这样的行为？

Answer 1

解决方案:

我在单元格中添加了带有删除图像的按钮， 然后在 cellForItemAtIndexPath:

...
if (self.editing) {
    cell.deleteButton.hidden = NO;
}else cell.deleteButton.hidden = YES;
...

触摸编辑按钮时重新加载数据:

- (void)setEditing:(BOOL)editing animated:(BOOL)animated {
    [super setEditing:editing animated:animated];
    _fetchedResultsController = nil;
    [self.collectionView reloadData];
}

按钮触发删除方法:

- (IBAction)deleteTour:(UIButton *)sender{
    NSIndexPath *indexPath = nil;
    indexPath = [self.collectionView indexPathForItemAtPoint:[self.collectionView convertPoint:sender.center fromView:sender.superview]];
}