Reputation: 191

UIStackview align left

I'm trying to align the items in UIStackview horizontally to the left.

Is there anyway to do this programmatically? I tried to do this via storyboard but was not successful. For some reason, the items in the UIStackView centers itself.

Upvotes: 19

Answers (8)

Droid Chris

Reputation: 3773

Remove the trailing constrant (even though XCode complains!!!) and your problem will be solved. This will cause the the view to expand as you add items to it.

Upvotes: 0

hbk

Reputation: 11184

Thanks to @Ankit Maurya, solution with example for swift

 let stackView = UIStackView()
 stackView.axis = .horizontal
 stackView.distribution = .fill
 
 let spacer = UIView()
 spacer.isUserInteractionEnabled = false
 spacer.setContentHuggingPriority(.fittingSizeLevel, for: .horizontal)
 spacer.setContentCompressionResistancePriority(.fittingSizeLevel, for: .horizontal)

 // stackView.addArrangedSubview.... any u need
 stackView.addArrangedSubview(spacer)

Example:

Upvotes: 10

Baran

Reputation: 2810

Swift 4.2 + iOS 12.1 tested:

    let stackView: UIStackView = UIStackView(frame: .zero)
    stackView.translatesAutoresizingMaskIntoConstraints = false
    stackView.axis = .vertical
    stackView.alignment = .leading // <- aligns each of your items to the left. 

    // further setup + setup constraints
    // ...

Upvotes: 8

Ankit Maurya

Reputation: 782

Try Adding One Space View in Your Stack View , Like this

 // To Make Our Buttons aligned to left We have added one spacer view
    UIButton *spacerButton = [[UIButton alloc] init];
    [spacerButton setContentHuggingPriority:UILayoutPriorityFittingSizeLevel forAxis:UILayoutConstraintAxisHorizontal];
    [spacerButton setContentCompressionResistancePriority:UILayoutPriorityFittingSizeLevel forAxis:UILayoutConstraintAxisHorizontal];
    [self.buttonsStackView addArrangedSubview:spacerButton];

And Make

self.buttonsStackView.distribution = UIStackViewDistributionFill;

Upvotes: 14

shtnkgm

Reputation: 1486

If you use StackView setting axis property to "Horizontal", I think you can't align it to the left.

But there is a way to make it left visually.

set StackView leading constraint with "equal" relationship
set StackView trailing constraint with "greater than or equal"

like this

stackView.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
stackView.trailingAnchor.constraint(greaterThanOrEqualTo: view.trailingAnchor).isActive = true

Upvotes: 29

Yong Jia Pao

Reputation: 191

Thanks for the advice guys. I tried playing with the options on UIStackView.alignment but it never really worked as desired. In the end I messed with the width of the UIStackView to achieve the desired results.

if(prdDTO.getShellIcn() == "Y")
    {
        let icon = UIImageView()
        icon.contentMode = UIViewContentMode.scaleAspectFit
        icon.image = #imageLiteral(resourceName: "Shellfish")
        prdIngredients.addArrangedSubview(icon)
        stackviewWidth += 25
    }

    if(prdDTO.getVegeIcn() == "Y")
    {
        let icon = UIImageView()
        icon.contentMode = UIViewContentMode.scaleAspectFit
        icon.image = #imageLiteral(resourceName: "Vege")
        prdIngredients.addArrangedSubview(icon)
        stackviewWidth += 25
    }

    if(prdDTO.getSpicyIcn() == "Y")
    {
        let icon = UIImageView()
        icon.contentMode = UIViewContentMode.scaleAspectFit
        icon.image = #imageLiteral(resourceName: "Spicy")
        prdIngredients.addArrangedSubview(icon)
        stackviewWidth += 25
    }

    prdIngredients.widthAnchor.constraint(equalToConstant: CGFloat(stackviewWidth))

Upvotes: 0