I'm a little unclear as to what's going on here, but it sounds like there is a UITableView
concepts worth explaining here:
UITableView
has its own concept of a cell, implemented as UITableViewCell
, and its own concept of a header/footer, implemented as UITableViewHeaderFooterView
.
Depending on which of these two you meant, there are a few things you can do to get the intended effect:
The UITableViewCell
Approach:
If you're using a UITableViewCell
as the first row of a section to act like a "header," and you just want to reload that row to the exclusion of the rest of the section, you can call yourTableViewInstance.reloadRows(at:with:)
(Apple Documentation) This method takes an array of IndexPath
s, and an animation style. You can pass in the indexPath of the one you want to reload.
The UITableViewHeaderFooterView
Approach:
If you're using a proper UITableViewHeaderFooterView
then you need to make sure that you're providing the appropriate view when reloading the section. Zack Shapiro outlines the steps you need to take in this answer:
- Create a class that's a subclass of
UITableViewHeaderFooterView
.
- Register it with your
UITableView
instance.
- Then in
viewForHeaderInSection
, you do let header = tableView.dequeueReusableHeaderFooterView(withIdentifier: "HeaderView") as! YourHeaderViewSubclass
The last thing he points out is this:
The deceptive thing is the function calls for a return of UIView?
when it really needs a dequeuedReusableHeaderFooterView
or reloadData
will cause it to disappear.
It depends on which of these two implementation paths you're taking, but this should be enough information to point you in the right direction.
Edit:
Based on the code you added, it looks like you're calling yourTableViewInstance.dequeueReusableCell(withIdentifier:for:)
instead of yourTableViewInstance.dequeueReusableHeaderFooterView(withIdentifier:)
inside of viewForHeaderInSection
.
You need to have a subclass of UITableViewHeaderFooterView
and then call it correctly. Create that new subclass, then change this:
func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
let cellHeader = tableViewHome.dequeueReusableCell(withIdentifier: "header") as! HeaderTableViewCell
// ...
to this:
func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
let cellHeader = tableViewHome.dequeueReusableHeaderFooterView(withIdentifier: "header") as! HeaderTableView
// ...
You need to follow two steps here:
- Create a new class, subclassing
UITableViewHeaderFooterView
instead of UITableViewCell
.
- Then use the appropriate class as outlined above.