NSView distorted after NSWindow resized

Question

I'm using the animator() to scroll a NSScrollView sideways between frames (child views) of my app. When the animation is happening and I resize the NSWindow the whole NSView gets distorted like so:

Here's the code responsible for the transition:

func goToFrame(frameNumber: Int) {
    dispatch_async(dispatch_get_main_queue(), {
        var clipView: NSClipView = self.container.contentView
        newOrigin: NSPoint = clipView.bounds.origin
        newOrigin.x = CGFloat(self.viewWidth * frameNumber)

        NSAnimationContext.beginGrouping()
        NSAnimationContext.currentContext().duration = 0.4
        self.container.contentView.animator().bounds.origin = newOrigin
        self.container.reflectScrolledClipView(self.container.contentView)
        NSAnimationContext.endGrouping()
    })
}

Any idea why it would do that? I don't get any warnings in the log.

Answer 1

Answered by Ken Thomases in a comment:

This line:

self.container.contentView.animator().bounds.origin = newOrigin

should be changed to:

self.container.contentView.animator().setBoundsOrigin(newOrigin)