Margins of header/footer cannot be set using .onSetupView

[plastus]

The following code has no effect on the layout margins of the default header/footer method.

            +++ Section { s in
                var footer = HeaderFooterView<UITableViewHeaderFooterView>(.Class)
                footer.onSetupView = { view,_,_ in
                    view.preservesSuperviewLayoutMargins = false
                    view.contentView.preservesSuperviewLayoutMargins = false
                    view.contentView.layoutMargins.left = 50
                    view.layoutMargins.left = 50
                    view.textLabel!.text = "Testing a really long string to make sure that it wraps around properly."
                    view.textLabel!.preservesSuperviewLayoutMargins = false
                    view.textLabel!.layoutMargins.left = 50
                }
                s.footer = footer
            }

1. How can the left/right margins be set properly in this scenario?

2. Is the proper way of adding images to a header view using custom class? What if I have 5 sections and want to use different images for each one? Is there a way to just pass the name of the image to be used instead of re-writing the same code over and over again under different class names?

3. How to manipulate label strings to eliminate all character capitalization?

   Section(header: "Application Settings", footer: "")
   

For instance, with the above simple section definition....how would I accomplish 1,2,3?

Would any of this require overriding built-in tableView functions? I've been trying to discover the answer but so far I've hit dead-ends in potential solutions.

As always, help/hints are greatly appreciated!

[plastus]

Ok, I've come up with the following:

class GenericFooter: UIView {

override init(frame: CGRect) {
    super.init(frame: frame)
    self.preservesSuperviewLayoutMargins = false
    let textView = UILabel()
    textView.frame = CGRect(x: 0, y: 0, width: UIScreen.mainScreen().bounds.width - 30, height: 20 )
    textView.text = "This is  a very very very long title, This is  a very very very long title, This is  a very very very long title, This is  a very very very long title, This is  a very very very long title, This is  a very very very long title Let's add some more stuff here to see how it handles."
    textView.numberOfLines = 0
    textView.textAlignment = .Justified
    textView.font = UIFont.preferredFontForTextStyle(UIFontTextStyleFootnote)
    textView.textColor = UIColor(red:0.47, green:0.47, blue:0.49, alpha:1.0)
    textView.frame = textView.bounds
    textView.sizeToFit()
    self.addSubview(textView)
    self.bounds = CGRect(x: -15, y: -3, width: textView.bounds.width - 16, height: textView.bounds.height)
}

required init?(coder aDecoder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}
}

My question now: How can I pass along the string that would set textView.text?

To set the section I do:

    +++ Section() {
        $0.header = HeaderFooterView<GenericHeader>(HeaderFooterProvider.Class)
        $0.footer = HeaderFooterView<GenericFooter>(HeaderFooterProvider.Class)
    }

[plastus]

I've tried the following with no luck. label is always nil, even though I define it in '.onSetupView'

class GenericHeader2: UIView {

    lazy var label: String = {
        var somestring = String()
        return somestring
    }()

    override init(frame: CGRect) {
        super.init(frame: frame)
        var textView = UILabel()
        textView.frame = CGRect(x: 0, y: 0, width: UIScreen.mainScreen().bounds.width - 30, height: 20 )
        textView.text = label
        textView.numberOfLines = 0
        textView.textAlignment = .Justified
        textView.font = UIFont.preferredFontForTextStyle(UIFontTextStyleBody)
        textView.textColor = UIColor(red:0.47, green:0.47, blue:0.49, alpha:1.0)
        textView.frame = textView.bounds
        textView.sizeToFit()
        self.preservesSuperviewLayoutMargins = false
        self.addSubview(textView)
        self.bounds = CGRect(x: -15, y: -3, width: textView.bounds.width - 15, height: textView.bounds.height + 8)
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

Attempting to set variable for title string.

+++ Section() { s in
    var header = HeaderFooterView<GenericHeader2>(HeaderFooterProvider.Class)
    var footer = HeaderFooterView<GenericFooter>(HeaderFooterProvider.Class)
    header.onSetupView = { v,s in
        v.label = "Some very very very long string will go here so that we can see whether this class performs the drawing correctly."
    }
    s.header = header
    s.footer = footer
}

Edit: Is there a reason why .onSetupView is called multiple times? I was doing some de-bugging and it looks like a print statement there is executed between 5-15 times....

[mats-claassen]

It should be called once every time the tableView reloads that section.
You have to consider that init is called before onSetupView so that label will always be empty. You should set the text of your label in onSetupView.