viewForHeaderInSection incorrect width

问题

Width of my headerView does not adapt to the width of the screen. My viewForHeaderInSection function:

func tableView(tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
    let cell = self.tableView.dequeueReusableCellWithIdentifier("sectionCell") as! sectionCell
    cell.hint.text = "some name"

    cell.tag = section


    let singleTap = UITapGestureRecognizer(target: self, action: #selector(singleTapOnSection(_:)))

    cell.addGestureRecognizer(singleTap)

    let view = UIView(frame: cell.frame)

    view.addConstraints(cell.constraints)

    view.addSubview(cell)

    return view
}

I must add cell to the UIView (or something similar) because i have hiding of row in the section. In my opinion i must add to "view" some constraints programmatically, but i dont know how

回答1:

Define a customView: UITableViewHeaderFooterView class, and in viewDidLoad: of View Controller write

tableView.registerClass(customView.classForCoder(), forHeaderFooterViewReuseIdentifier: "HeaderIdentifier")

And instead of dequeueing a cell, dequeue a UITableViewHeaderFooterView (as it is the right way to do it).

This way you have to add auto layout in code or define it in a nib file, working with nibs and handling all kinds of things is kinda frustrating, if you're using this approach i suggest use this library NibDesignable.

回答2:

You should define headerview with same width of tableview and height what you require. don't give cell's height or width. If you are using storyborard for ui then drag uiview on tableview at upper side it will automatically set as headerview and then give top,leading,trailing and fix heigth constraints and remove viewForHeaderInSection method.

hope this will help :)

来源：https://stackoverflow.com/questions/36701095/viewforheaderinsection-incorrect-width