第四章 滑动删除

override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) { 
}

override func tableView(tableView: UITableView, editActionsForRowAtIndexPath indexPath: NSIndexPath) -> [AnyObject]? {
    // 分享项
    let shareAction = UITableViewRowAction(style: .Default, title: "Share") { (action, indexPath) -> Void in
        // 选择分享目标
        let shareMenu = UIAlertController(title: nil, message: "Share using", preferredStyle: .ActionSheet)
       
        let twitterAction = UIAlertAction(title: "Twitter", style: .Default, handler: nil)
        let facebookAction = UIAlertAction(title: "Facebook", style: .Default, handler: nil)
        let emailAction = UIAlertAction(title: "Emain", style: .Default, handler: nil)
        let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel, handler: nil)
       
        shareMenu.addAction(twitterAction)
        shareMenu.addAction(facebookAction)
        shareMenu.addAction(emailAction)
        shareMenu.addAction(cancelAction)
       
        self.presentViewController(shareMenu, animated: true, completion: nil)
    }
   
    // 删除项（实现了这个方法需要自己写删除项）
    let deleteAction = UITableViewRowAction(style: .Default, title: "Delete") { (action, indexPath) -> Void in
        // 从数据源中删除
        // ...
       
        self.tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
    }
   
    // 设置背景色
    shareAction.backgroundColor = UIColor.orangeColor()
    deleteAction.backgroundColor = UIColor.blueColor()
   
    return [shareAction, deleteAction]
}