CODEWITHSUNDEEP
iosswift4.2
TJBlack31
TJBlack31

Reputation: 785

Swift 4 conversion - Type 'NSLayoutConstraint' has no member 'FormatOptions'. What would be the right call?

I have this section of code:

let menuScrollView_constraint_H:Array = NSLayoutConstraint.constraints(withVisualFormat: "H:|[menuScrollView]|", options: NSLayoutConstraint.FormatOptions(rawValue: 0), metrics: nil, views: viewsDictionary)
let menuScrollView_constraint_V:Array = NSLayoutConstraint.constraints(withVisualFormat: "V:[menuScrollView(\(menuHeight))]", options: NSLayoutConstraint.FormatOptions(rawValue: 0), metrics: nil, views: viewsDictionary)

And I keep getting "has no member" compiler errors for all of the NSData types in this class.

This library I'm using was apparently updated to Swift 4.2. How come these compiler errors are happening?

For example, I noticed there is a public struct called NSLayoutFormatOptions. Would I use that instead? If so, how would I use it?

Thank you for any insights

Upvotes: 0

Views: 1171

Answers (1)

fewlinesofcode
fewlinesofcode

Reputation: 3082

If no options need to be specified, send an empty array:

let menuScrollView_constraint_H:Array = NSLayoutConstraint.constraints(withVisualFormat: "H:|[menuScrollView]|", options: [], metrics: nil, views: viewsDictionary)
let menuScrollView_constraint_V:Array = NSLayoutConstraint.constraints(withVisualFormat: "V:[menuScrollView(\(menuHeight))]", options: [], metrics: nil, views: viewsDictionary)

If options need to be specified, choose needed from the FormatOptions Option set and write like I did below (I Used .alignAllBottom for sample):

let menuScrollView_constraint_H:Array = NSLayoutConstraint.constraints(withVisualFormat: "H:|[menuScrollView]|", options: .alignAllBottom, metrics: nil, views: viewsDictionary)
        let menuScrollView_constraint_V:Array = NSLayoutConstraint.constraints(withVisualFormat: "V:[menuScrollView(\(menuHeight))]", options: .alignAllBottom, metrics: nil, views: viewsDictionary)

List of FormatOptions with descriptions can be found here

Upvotes: 1

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