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tanman
tanman

Reputation: 175

How do I programmatically make this auto layout?

How do I make the label auto layout for all devices. 

        golabel = UILabel(frame: CGRectMake(30, 100, 350, 100))
        golabel.text = "Game Over"
        golabel.textColor = UIColor.whiteColor()
        golabel.font = UIFont(name: "AppleSDGothicNeo-Thin" , size: 70)
        self.view.addSubview(golabel)

Upvotes: 0

Views: 77

Answers (2)

Andrea
Andrea

Reputation: 26383

After you added the label as a subview you need to avoid autolayout to convert autoresizing masks into constraints or you will probably have conflicts.

golabel.setTranslatesAutoresizingMaskIntoConstraints(false)

Here you add the constraints

 let horizontalConstraint = NSLayoutConstraint(item: golabel, attribute: NSLayoutAttribute.CenterX, relatedBy: NSLayoutRelation.Equal, toItem: self.view, attribute: NSLayoutAttribute.CenterX, multiplier: 1, constant: 0)
    self.view.addConstraint(horizontalConstraint)

let verticalConstraint = NSLayoutConstraint(item: golabel, attribute: NSLayoutAttribute.CenterY, relatedBy: NSLayoutRelation.Equal, toItem: self.view, attribute: NSLayoutAttribute.CenterY, multiplier: 1, constant: 0)
    self.view.addConstraint(verticalConstraint)

Since you are not adding constraints that inhibit the label to grow the label will use its intrinsic content size, thus it can grow indefinitely based on the length and font of the text.

Upvotes: 0

agy
agy

Reputation: 2854

let golabel = UILabel()

golabel.setTranslatesAutoresizingMaskIntoConstraints(false)

let horizontalConstraint = NSLayoutConstraint(item: golabel, attribute: NSLayoutAttribute.Leading, relatedBy: NSLayoutRelation.Equal, toItem: view, attribute: NSLayoutAttribute.Leading, multiplier: 1, constant: 30)
view.addConstraint(horizontalConstraint)

let verticalConstraint = NSLayoutConstraint(item: golabel, attribute: NSLayoutAttribute.Top, relatedBy: NSLayoutRelation.Equal, toItem: view, attribute: NSLayoutAttribute.Top, multiplier: 1, constant: 100)
view.addConstraint(verticalConstraint)

let widthConstraint = NSLayoutConstraint(item: golabel, attribute: NSLayoutAttribute.Width, relatedBy: NSLayoutRelation.Equal, toItem: nil, attribute: NSLayoutAttribute.NotAnAttribute, multiplier: 1, constant: 350)
golabel.addConstraint(widthConstraint)

let heightConstraint = NSLayoutConstraint(item: golabel, attribute: NSLayoutAttribute.Height, relatedBy: NSLayoutRelation.Equal, toItem: nil, attribute: NSLayoutAttribute.NotAnAttribute, multiplier: 1, constant: 100)
golabel.addConstraint(heightConstraint)

Upvotes: 1

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