'Swift set content compression resistance

Using Swift again, am I missing something?

I have this line:

self.itemDescription?.setContentCompressionResistancePriority(UILayoutPriorityRequired, forAxis: UILayoutConstraintAxis.Vertical);

But Xcode is giving me an error:

Undefined symbols for architecture i386: "_UILayoutPriorityRequired"

Another one of Swift's quirks?

Solution 1:^[1]

One thing to keep in mind is that, even though UILayoutPriority is an alias to Float, you're using Swift and you can use an extension to create semantic constants for these values:

extension UILayoutPriority {
    static var Low: Float { return 250.0 }
    static var High: Float { return 750.0 }
    static var Required: Float { return 1000.0 }
}

Then you're code can read as:

self.itemDescription?.setContentCompressionResistancePriority(UILayoutPriority.Required, forAxis: .Vertical);

I've done this myself in one of my projects and thought it may be useful.

Solution 2:^[2]

You can also write this:

self.itemDescription?.setContentCompressionResistancePriority(UILayoutPriority(<float number>), forAxis: .Vertical)

Example:

self.itemDescription?.setContentCompressionResistancePriority(UILayoutPriority(750), forAxis: .Vertical)

Sources

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Source: Stack Overflow

Solution	Source
Solution 1
Solution 2	Ayush Gupta

'Swift set content compression resistance

Solution 1:[1]

Solution 2:[2]

Sources

Related Questions

Solution 1:^[1]

Solution 2:^[2]