新的FUITableViewDataSource-如何使用?斯威夫特3 [英] New FUITableViewDataSource - how to use? Swift 3

问题描述

仅更新到了较新的FirebaseUI Pod-发生了一些变化，但是最大的变化之一是FUI Table View的工作方式.我在较旧的版本上运行良好，但是在下面遇到了这一问题-缺少文档/示例.

Just updated to the newer FirebaseUI Pod - a few things have changed but one of the big ones is the way that the FUI Table View works. I had it working well on an older version but am struggling with this below - and the lack of documentation/examples.

 self.dataSource = FUITableViewDataSource(query: <#T##FIRDatabaseQuery#>, view: <#T##UITableView#>, populateCell: <#T##(UITableView, IndexPath, FIRDataSnapshot) -> UITableViewCell#>)

我不知道从哪里调用indexpath.我需要单独创建一个NSIndexPath来传递它吗?我也不太了解它应该放在哪里-以前，它是FirebaseTableViewDataSource，我将其设置在viewDidLoad中，它将直接从中创建单元格等.现在看来，它似乎需要存在于我的cellForRowAtIndexPath中.有人对此有任何建议吗?

I don't understand where the indexpath is being called from. Do I need to make a seperate NSIndexPath to pass into that? I also don't really understand where this is supposed to live - previously, with it was FirebaseTableViewDataSource, I would set it in my viewDidLoad, and it would create the cells etc straight from that. It almost now looks as though it needs to live in my cellForRowAtIndexPath. Does anyone have any advice on this?

推荐答案

测试使用tableView:bind:方法(好像它们做了UITableView类扩展)，并且我能够使其正常工作.

The test for this latest version uses a tableView:bind: method (seems like a UITableView class extension they made) and I was able to get it to work.

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)

    let firebaseRef = FIRDatabase.database().reference().child(/*insert path for list here*/)

    let query = firebaseRef.queryOrderedByKey() /*or a more sophisticated query of your choice*/

    let dataSource = self.tableView.bind(to: query, populateCell: { (tableView: UITableView, indexPath: IndexPath, snapshot: FIRDataSnapshot) -> UITableViewCell in

        let cell = tableView.dequeueReusableCell(withIdentifier: "cellIdentifier", for: indexPath)

        let value = snapshot.value as! NSDictionary

        let someProp = value["someProp"] as? String ?? ""

        cell.textLabel?.text = someProp

        return cell
    })
}

还要确保您正在观察更改查询，否则tableView不会被填充

Also make sure you are observing your query for changes or else the tableView won't get populated

self.query?.observe(.value, with: { snapshot in
})

这篇关于新的FUITableViewDataSource-如何使用?斯威夫特3的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！