Arbitur Arbitur - 1 month ago 18
iOS Question

Make view round after autolayout

I have a

tableview
with custom cells which are built from
storyboard
with an identifier using
AutoLayout
.

One of the
subviews
needs to be round
(layer.cornerRadius = width/2)
, it is a square in the beginning.

I have tried in
layoutSubviews()
but it seems to be called before
AutoLayout
changes its size... same thing for
didMoveToSuperview()


Where is the proper function to update things like this to my subviews after
AutoLayout
has changed their sizes?

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("cell_small") as! Cell
...
return cell
}

// In Cell

override func layoutSubviews() {
rankLabel.layer.cornerRadius = rankLabel.bounds.width/2
rankLabel.layer.masksToBounds = true
}

override func didMoveToSuperview() {
rankLabel.layer.cornerRadius = rankLabel.bounds.width/2
rankLabel.layer.masksToBounds = true
}


Result:


Answer

What I ended up doing was making a class called RoundView

class RoundView:UIView {
    override func layoutSubviews() {
        super.layoutSubviews()

        self.layer.cornerRadius = self.bounds.width/2
        self.layer.masksToBounds = true
    }
}

And then I apply it to every view I need to be round. So in Storyboard I add RoundView to Custom Class.

What was happening was that if you look inside the source of the storyboard (XML) every view had the size of the whole screen, you can look inside your own SB code. So by trying to add a corner radius equal to the width/2 inside its parent layoutSubviews() that subview hasn't got its frame set correctly. So the corner radius got the value of 320/2 instead of 50/2, thats why it got misshaped.

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