重新加载部分时没有动画的Tableview仍然抖动

Question

In a tableview's section. I have some selectable rows. Inside the section's header I have a Deselect All button.

The deselect all button needs to get enabled if a row is selected and disabled if no row is selected. The button is enabled/disabled by reading a boolean value. I have a didSet on that boolean:

var shouldEnableDeselectButton = false
    {
        didSet{
            if oldValue != shouldEnableDeselectButton{
                DispatchQueue.main.async {
                    self.notesTable.reloadSections([self.indexofFilter], with: .none)
                }
            }
        }
    }

• If I do absolutely nothing in the didSet then it only gets updated by being dequeued/scrolling up or down and getting off the screen. See below:

• If I do self.notesTable.reloadSections([someSection], with: .none) then it longer requires the section header to get dequeued. Yet if I select one of the last rows, then it jitters badly: See below:

I looked online and found solutions mentioned Reload tableview section without scroll or animation but they both still jitter

Answer 1

2 things were needed:

1. Get a reference/pointer to the headerView. Eg this answer.

2. Have your button as a property . I was originally having it just as a subview. That wasn't enough! To do such I made my sectionHeader a UITableViewHeaderFooterView subclass and then added the button as a property.

Then I was simply able to change the isEnabled property of the button.