how to make UILabel autosize text in storyboard (or interface builder), NOT programmatically

Solution 1:

On any element in Interface Builder you can select the element and hit...

Editor > Size to Fit Content (keyboard shortcut: CMD+=)

This will do a "sizeToFit" on the selected element. Labels will fit their text size, image view will resize to the image size, etc...

Solution 2:

In Xcode 6.1, I had to set Content Compression Resistance Priority to a higher value, likely because I have other constraints that were conflicting, or causing the sizeToFit option to be disabled.

Before: After:

Solution 3:

For the text label:

Set Lines to 0

Set Height to Greater than or equal to 30 (or other value)

Now the height will be adjusted based on the lines number.