Change UIScrollView Content size

6
votes

I have ViewController with UIScrollView, some UIImages and UIButtons. In the Storyboard I set the size of UIScrollView to: width: 320, height: 570

I want to change Contentsize of my UIScrollView when the ViewController was loaded.

I added side in the viewDidLoad:

        scrlMain.contentSize = CGSize(width: 320,height: 790)

And also I added code in the viewDidLayoutSubviews:

        self.scrlMain.translatesAutoresizingMaskIntoConstraints = true

But my UIScrollView is still the last size = 570. I can't use viewDidAppear because, when I press the button, it need it to change color. When it has changed color, my UIScrollView moves to up.

What did I do wrong?

All code:

    override func viewDidLoad() {
    super.viewDidLoad()
    scrlMain.delegate = self
    scrlMain.contentSize = CGSizeMake(320, 790)
    }
override func viewDidLayoutSubviews() {
    self.scrlMain.translatesAutoresizingMaskIntoConstraints = true
    self.scrlMain.contentSize = CGSize(width: self.scrlMain.frame.width, height: 60.0 + 5 * (self.scrlMain.frame.width / 16.0 * 5.0));
}
4
iosswiftuiscrollviewcontentsize

4 Answers

8
votes

there was an error in the this function:

override func viewDidLayoutSubviews() {
self.scrlMain.translatesAutoresizingMaskIntoConstraints = true
self.scrlMain.contentSize = CGSize(width: self.scrlMain.frame.width, height: 60.0 + 5 * (self.scrlMain.frame.width / 16.0 * 5.0));
}

I delete this code:

self.scrlMain.contentSize = CGSize(width: self.scrlMain.frame.width, height: 60.0 + 5 * (self.scrlMain.frame.width / 16.0 * 5.0));

And all was right

1
votes

Hey @Dim you can try this-

yourScrollView.contentSize = CGSizeMake(320, 568)

And you can change size 568 to whatever you want.

0
votes

Try this:

yourScrollView.userInteractionEnabled = YES

and you please maintain the difference between your screen size and your scrollview content size... so that it can be visible properly

suppose yourScrollViewSize greatertThan yourScreenSize

0
votes
override func viewDidLayoutSubviews() {

    DispatchQueue.main.async {
    self.scrollview.translatesAutoresizingMaskIntoConstraints = true
    self.scrollview.contentSize = CGSize(width:0, height:self.scrollview.frame.height*2) // whatever hight you want
    }
}