Xcode: How to manually set the height of a UIView?


To manually set the height of a UIView in Xcode, you can modify its frame or constraints. Here are two solutions you can use:

  1. Modifying the Frame of the UIView component:
   let view = UIView(frame: CGRect(x: 0, y: 0, width: 200, height: 100))

In the above code, a UIView named view is created with a frame that specifies its origin (x, y) and size (width, height). You can adjust the height value (in this case, 100) to set the desired height.

  1. Using Constraints:
   let view = UIView()
   view.translatesAutoresizingMaskIntoConstraints = false
   view.heightAnchor.constraint(equalToConstant: 100).isActive = true

In this approach, you create a UIView named view and set its translatesAutoresizingMaskIntoConstraints property to false to enable manual constraints. Then, you create a height constraint using the heightAnchor property and set its constant value to the desired height (in this case, 100). Finally, activate the constraint by setting isActive to true.

Note that when using constraints, you might need to consider other constraints or layout configurations to properly position and size your UIView. If you’re using Auto Layout, make sure to set appropriate constraints for other attributes like width, position, and alignment.

Choose the approach that suits your needs and integrate it into your code accordingly.

Example from my own code: If you want to create a UIView container that will always occupy the top half of the screen independently from the iOS device it is running on, you can use this code:

  1. Create the UIView on your main StoryBoard
  2. Set the top, left, and right constraints to Zero, only the height is left undefined
  3. Get the screen size of the device programmatically and assign to a variable
  4. Set the heightAnchor constraint to your “half the screen” variable

This will set the height of your UIView component always to the half of the screen height, no matter what iPhone model the end user is using.

Hope this is helpful.