How to set two UILabels compression priority to make one push the other vertically?

One image is worth a thousand words:

These two labels are in a UICollectionviewCell. These are the activated constains on the labels:

blue.topAnchor.constraint(equalTo: container.topAnchor)
blue.leftAnchor.constraint(equalTo: container.leftAnchor)
blue.rightAnchor.constraint(equalTo: container.rightAnchor)

green.topAnchor.constraint(equalTo: bottomAnchor)
green.leftAnchor.constraint(equalTo: container.leftAnchor)
green.rightAnchor.constraint(equalTo: container.rightAnchor)
green.bottomAnchor.constraint(equalTo: container.bottomAnchor)

And what I tried to do but doesn't seem to work :

blue.setContentHuggingPriority(.defaultLow, for: .vertical)
blue.setContentCompressionResistancePriority(.defaultLow, for: .vertical)
green.setContentCompressionResistancePriority(.defaultHigh, for: .vertical)

How can I make the blue label to take the least possible space, being pushed by the green one ?

Both labels are multilines.

Solution

You need to set the vertical content hugging of green label lower than the vertical content hugging of the blue label.

Here is an article that always help me when i forget how this works: https://medium.com/@abhimuralidharan/ios-content-hugging-and-content-compression-resistance-priorities-476fb5828ef