Question

由于某些原因，这段代码在xcode6.4中完美运行，但是当切换到xcode7时，它会冻结应用程序。

我要做的是在用户的Feed中提取帖子信息并将其显示在tableview上。我可以从Firebase中提取信息，但应用程序会在桌面视图上显示之前冻结。

编辑：当我没有任何约束或自动布局时，tableview有效。当我试图获得动态细胞高度时似乎无效。

func getRadarData() {
    let url = "https://(insert appname).firebaseio.com/users/" + currentUser + "/postsReceived/"
    let targetRef = Firebase(url: url)

    targetRef.observeEventType(.ChildAdded, withBlock: {
        snapshot in
        print("child")

        if let found = self.posts.map({ $0.key }).indexOf(snapshot.key) {
            let obj = self.posts[found]
            print(obj)
            print(found)
            self.posts.removeAtIndex(found)
        }

        let postsUrl = "https://(insert appname).firebaseio.com/posts/" + snapshot.key
        let postsRef = Firebase(url: postsUrl)
        var updatedAt = snapshot.value["updatedAt"] as? NSTimeInterval
        var endAt = snapshot.value["endAt"] as? NSTimeInterval

        if updatedAt == nil {
            updatedAt = 0
        }

        if endAt == nil {
            endAt = 0
        }

        postsRef.observeSingleEventOfType(.Value, withBlock: { snapshot in
            if let key = snapshot.key
            {if let content = snapshot.value["content"] as? String {
                if let creator = snapshot.value["creator"] as? String {
                    if let createdAt = snapshot.value["createdAt"] as? NSTimeInterval {
                                let userurl = "https://(insert appname).firebaseio.com/users/" + (creator)
                                let userRef = Firebase(url: userurl)
                                userRef.observeSingleEventOfType(.Value, withBlock: { snapshot in
                                    if let username = snapshot.value["username"] as? String {
                                        let updatedDate = NSDate(timeIntervalSince1970: (updatedAt!/1000))
                                        let createdDate = NSDate(timeIntervalSince1970: (createdAt/1000))
                                        let endedDate = NSDate(timeIntervalSince1970: (endAt!))

                                        let post = Post(content: content, creator: creator, key: key, createdAt: updatedDate, name: username, joined: true, messageCount: 0, endAt: endedDate)

                                        self.posts.append(post)

                                        // Sort posts in descending order
                                        self.posts.sortInPlace({ $0.createdAt.compare($1.createdAt) == .OrderedDescending })
                                        self.tableView.reloadData()

                                    }
                                })

                    }
                }
                }

            }
        })
    })
}

这是我的tableview代码，我在textView和nameLabel上使用了autolayout

    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

    let cell: RadarTableViewCell = tableView.dequeueReusableCellWithIdentifier("radarCell", forIndexPath: indexPath) as! RadarTableViewCell

    let creator: (String) = posts[indexPath.row].creator
    let key = posts[indexPath.row].key

    let radarContent: (AnyObject) = posts[indexPath.row].content
    cell.textView.selectable = false
    cell.textView.text = radarContent as? String
    cell.textView.userInteractionEnabled = false

    cell.textView.selectable = true

    let radarCreator: (AnyObject) = posts[indexPath.row].name

    cell.nameLabel.text = radarCreator as? String

    return cell

Answer 1

问题是我在textView中有初始文本。我在故事板上删除了它，我的应用程序现在正常工作。

在此处找到解决方案：Why does a previously working Xcode project hang up in Xcode 7 when presenting a new UITableviewController Subclass?

Firebase函数冻结了xcode7中的应用程序，但适用于xcode6.4

1 个答案: