我如何得到删除按钮显示时,在一个UITableViewCell滑动?该事件永远不会引发,删除按钮也永远不会出现。


当前回答

在iOS 8和Swift 2.0中,请尝试这个,

override func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
   // let the controller to know that able to edit tableView's row 
   return true
}

override func tableView(tableView: UITableView, commitEdittingStyle editingStyle UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath)  {
   // if you want to apply with iOS 8 or earlier version you must add this function too. (just left in blank code)
}

override func tableView(tableView: UITableView, editActionsForRowAtIndexPath indexPath: NSIndexPath) -> [UITableViewRowAction]?  {
   // add the action button you want to show when swiping on tableView's cell , in this case add the delete button.
   let deleteAction = UITableViewRowAction(style: .Default, title: "Delete", handler: { (action , indexPath) -> Void in

   // Your delete code here.....
   .........
   .........
   })

   // You can set its properties like normal button
   deleteAction.backgroundColor = UIColor.redColor()

   return [deleteAction]
}

其他回答

在iOS 8和Swift 2.0中,请尝试这个,

override func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
   // let the controller to know that able to edit tableView's row 
   return true
}

override func tableView(tableView: UITableView, commitEdittingStyle editingStyle UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath)  {
   // if you want to apply with iOS 8 or earlier version you must add this function too. (just left in blank code)
}

override func tableView(tableView: UITableView, editActionsForRowAtIndexPath indexPath: NSIndexPath) -> [UITableViewRowAction]?  {
   // add the action button you want to show when swiping on tableView's cell , in this case add the delete button.
   let deleteAction = UITableViewRowAction(style: .Default, title: "Delete", handler: { (action , indexPath) -> Void in

   // Your delete code here.....
   .........
   .........
   })

   // You can set its properties like normal button
   deleteAction.backgroundColor = UIColor.redColor()

   return [deleteAction]
}

Swift 2.2:

override func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
    return true
}

override func tableView(tableView: UITableView,
    editActionsForRowAtIndexPath indexPath: NSIndexPath) -> [UITableViewRowAction]? {
    let delete = UITableViewRowAction(style: UITableViewRowActionStyle.Default, title: "DELETE"){(UITableViewRowAction,NSIndexPath) -> Void in

    print("Your action when user pressed delete")
}
let edit = UITableViewRowAction(style: UITableViewRowActionStyle.Normal, title: "EDIT"){(UITableViewRowAction,NSIndexPath) -> Void in

    print("Your action when user pressed edit")
}
    return [delete, block]
}

我有一个问题,我刚刚设法解决了,所以我分享它,因为它可能会帮助别人。

我有一个UITableView,并添加了显示的方法来启用滑动删除:

- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
    // Return YES if you want the specified item to be editable.
    return YES;
}

// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        //add code here for when you hit delete
    }    
}

我正在进行更新,使我可以将表设置为编辑模式并启用多选。为此,我添加了来自苹果TableMultiSelect示例的代码。当我开始工作时,我发现我的滑动删除功能已经停止工作。

事实证明,添加以下行到viewDidLoad是问题所在:

self.tableView.allowsMultipleSelectionDuringEditing = YES;

有了这一行,多选可以工作,但滑动删除就不行了。没有这条线,情况正好相反。

解决办法:

添加以下方法到你的viewController:

- (void)setEditing:(BOOL)editing animated:(BOOL)animated
{
    self.tableView.allowsMultipleSelectionDuringEditing = editing; 
    [super setEditing:editing animated:animated];
}

然后在你的方法中,将表格进入编辑模式(例如,从一个按钮按下),你应该使用:

[self setEditing:YES animated:YES];

而不是:

[self.tableView setEditing:YES animated:YES];

这意味着只有在表处于编辑模式时才启用多选功能。

如果你采用可变数据源,你必须将委托回调移动到UITableViewDiffableDataSource子类。例如:

class DataSource: UITableViewDiffableDataSource<SectionType, ItemType> {

    override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
        return true
    }

    override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
        if editingStyle == .delete {
            if let identifierToDelete = itemIdentifier(for: indexPath) {
                var snapshot = self.snapshot()
                snapshot.deleteItems([identifierToDelete])
                apply(snapshot)
            }
        }
    }
}

对于Swift,只需要写这段代码

func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
        if editingStyle == .Delete {
            print("Delete Hit")
        }
}

对于Objective C,只需编写以下代码

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
       if (editingStyle == UITableViewCellEditingStyleDelete) {           
            NSLog(@"index: %@",indexPath.row);
           }
}