After network request, tableView build the providers will offset some distance.

[dianqk]

After network request, tableView build the providers will offset some distance.

[DianQK]

umm... I'm not sure why there is a offset on tableView.
Look like you need checkout iOS 11 changed API. Or you need set section height is 0.

[angelen10]

But... I just write this code on your Example, and the tableView is your Example's code:

override func viewDidLoad() {
        super.viewDidLoad()
        
        self.view.backgroundColor = UIColor.white
        self.view.addSubview(tableView)
        tableView.translatesAutoresizingMaskIntoConstraints = false
        tableView.leadingAnchor.constraint(equalTo: self.view.leadingAnchor).isActive = true
        tableView.topAnchor.constraint(equalTo: self.view.topAnchor).isActive = true
        tableView.trailingAnchor.constraint(equalTo: self.view.trailingAnchor).isActive = true
        tableView.bottomAnchor.constraint(equalTo: self.view.bottomAnchor).isActive = true
        tableView.backgroundColor = Specs.color.background
        tableView.separatorColor = Specs.color.background
        tableView.rowHeight = 44
        tableView.sectionFooterHeight = 0.1
        tableView.sectionHeaderHeight = 0.1
        
        tableView.estimatedRowHeight = 0
        tableView.estimatedSectionFooterHeight = 0
        tableView.estimatedSectionHeaderHeight = 0
        
        RxKeyboard.instance.visibleHeight
            .drive(onNext: { [unowned self] keyboardVisibleHeight in
                self.tableView.contentInset.bottom = keyboardVisibleHeight
                self.tableView.scrollIndicatorInsets.bottom = keyboardVisibleHeight
            })
            .disposed(by: disposeBag)
    }

[DianQK]

If you async set delegate, you will get 35 point offset.

class ViewController: TableViewController, UITableViewDataSource, UITableViewDelegate {
    
    override func viewDidLoad() {
        super.viewDidLoad()

        self.tableView.register(UITableViewCell.self, forCellReuseIdentifier: "Cell")
        self.tableView.dataSource = self
        DispatchQueue.main.async {
            self.tableView.delegate = self
        }
    }

    func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 1
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        return tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
    }

    func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
        return CGFloat.leastNonzeroMagnitude
    }

}

To fix this, you can try to set delegate immediately after add UITableView, or change contentInset.

If you use Flix, you should build providers in viewDidLoad。

[angelen10]

Because providers are depend on the datas from server, I have to build these providers after the datas come.
I solve this problem, thanks for that.