Question

大家好我在Makeschool的makestagram项目中快速练习，我想让最新的帖子显示在表格视图的顶部让用户可以先看到最新的帖子！

任何人都可以帮忙吗？这是我的代码

override func viewDidLoad() {
    super.viewDidLoad()

    timelineComponent = TimelineComponent(target: self)
    self.tabBarController?.delegate = self



        }

  func takePhoto(){
    // instantiate photo taking class, provide callback for when photo  is selected
    photoTakingHelper = PhotoTakingHelper(viewController: self.tabBarController!,callback:{ (image: UIImage?)in
        let post = Post()
        post.image.value = image!

        post.uploadPost()
        }

    )

}
override func viewDidAppear(animated: Bool) {
timelineComponent.loadInitialIfRequired()
            }

func loadInRange(range: Range<Int>, completionBlock: ([Post]?) -> Void) {

ParseHelper.timelineRequestForCurrentUser(range) {
    (result: [PFObject]?, error: NSError?) -> Void in
    if let error = error {
    ErrorHandling.defaultErrorHandler(error)
    }


    let posts = result as? [Post] ?? []


    completionBlock(posts)
}

}

    extension TimelineViewController: UITableViewDataSource {
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
    return self.timelineComponent.content.count
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return 1
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier("PostCell")as! PostTableViewCell
    let post = timelineComponent.content[indexPath.section]
    post.downloadImage()
    post.fetchLikes()
    cell.post = post



    return cell

}

}

   extension TimelineViewController: UITableViewDelegate{
func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
    timelineComponent.targetWillDisplayEntry(indexPath.section)

}
      func tableView(tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
    let headerCell = tableView.dequeueReusableCellWithIdentifier("PostHeader")as! PostSectionHeaderView
    let post = self.timelineComponent.content[section]
    headerCell.post = post
    return headerCell
}
func tableView(tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
    return 40
}

}

Answer 1

我终于搞清楚了！

parse的PFquery得到了更新方法

我将createdAt更改为updatedAt。

现在它完美无缺！

makestagram - 从最新到旧排序的表格视图中的快速列表帖子

1 个答案: