UIScrollView中的子视图放错了位置

Question

I'm adding a few subviews to a UIScrollView and setting its contentSize, like this:

let cellWidth: CGFloat = 100.0
let cellHeight: CGFloat = 100.0

for i in 0...10 {
    let view: UIView = UIView(frame: CGRectMake(CGFloat(i) * cellWidth,  0, cellWidth, cellHeight))
    view.backgroundColor = UIColor.randomColor()
    self.scrollView.addSubview(view)
}
self.scrollView.contentSize = CGSizeMake(10 * cellWidth, cellHeight)

This is what I get:

I don't really understand why these subviews aren't drawn at y=0

There are no constraints applied in the storyboard to this UIScrollView.

Answer 1

I have found the reason for this.

For anyone with the same problem, just go to interface builder and select the troubling UIViewController.

In the 'Attributes Inspector' section, on the right pane, untick 'Adjust Scroll View Insets'.