UIScrollView pages content not working properly - iOS - ios

Question

I've been trying for one whole day to make it work right. I tried different tutos and made adjustments (searching in here) but it doesnt work properly.
On iphone 5s, it almost works right, excepts for the last page that it seems to add "half" of a page on scroll view. The green part is the background color of the scroll view and it doesn't bounce back.
On iphone 6, the content is all messed up and instead of having 5 images, it has only 4 and a half (i cant scroll it anymore and it doesn't bounce back).
If I press continue, it works perfectly on both screen sizes. It is only the swipe option that is not working properly.
Here is the code where I put the images inside the scroll view.
func loadContent() {
var frame = CGRect(x: 0, y: 0, width: 0, height: 0)
for i in 0..<imageArr.count { // is 5
frame.origin.x = scrollView.frame.size.width * CGFloat(i)
frame.size = self.scrollView.frame.size
let imageView = UIImageView(frame: frame)
let image = UIImage(named: imageArr[i])
imageView.autoresizingMask = [.flexibleWidth, .flexibleHeight, .flexibleBottomMargin, .flexibleRightMargin, .flexibleLeftMargin, .flexibleTopMargin]
imageView.contentMode = .scaleAspectFit
imageView.clipsToBounds = true
imageView.backgroundColor = UIColor.red
imageView.image = image
scrollView.addSubview(imageView)
self.scrollView.contentSize.width = self.scrollView.frame.width * CGFloat(i)
}
}
///Function of Continue button
#IBAction func nextImage(_ sender: Any) {
UIView.animate(withDuration: 0.3) {
self.scrollView.contentOffset.x = self.scrollView.frame.width * CGFloat(self.pageControl.currentPage+1)
}
}
I've been searching for 4 hours for a solution but nothing seems to work.
[Edit]: With the answer of TheFuquan I could solve the problem.
[Obs:] if you searching about the messed content, these lines of code can help you. All the tutos that I saw didn't have these lines and the content just wouldnt align perfect and this solved:
imageView.autoresizingMask = [.flexibleWidth, .flexibleHeight, .flexibleBottomMargin, .flexibleRightMargin, .flexibleLeftMargin, .flexibleTopMargin]
imageView.contentMode = .scaleAspectFit
imageView.clipsToBounds = true

Answer 1

Why is the following line in your for loop:
self.scrollView.contentSize.width = self.scrollView.frame.width * CGFloat(i)
You should do this before the for loop like this:
self.scrollView.contentSize.width = self.scrollView.frame.width * imageArr.count

Answer 2

this is a typical problem that i face each time i try to load some dynamic content inside a view.
If you re calling your function loadContent from viewDidLoad, then you should call your loadContent inside viewDidLayoutSubviews
Be aware that unlike viewDidLoad, viewDidLayoutSubviews may get called multiple times, so have a flag to ensure that your loadContent gets invoked only once.
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
guard self.didLoadContent == false else {
return
}
self.didLoadContent = true
loadContent()
}
this way you let the view loaded from your storyboard to resize the iPhone's size.