Sketch Plugin Develop : Is there an API for Sketch to unlock the size of MSBitmapLayer?

Question

The unlock size button in Sketh App

I can click this button to unlock the size of a layer in Sketch App. And then I can change the width/height ratio of the image. But I want my Sketch plugin to do this job instead of using my hand to click the button. Is there an API for Sketch to unlock the size of MSBitmapLayer ?

I've tried " [layer setIsLocked:false] ", but it's not about the size lock.

Thank you very much.

Answer 1

The particular function you are looking for is setConstrainProportions()

Here is an example for you, It might help you in understanding it

function toggleConstrainProportions(context) {
  var doc = context.document
  var selection = context.selection

  // Toggles the currently selected item(s) 'Constrain Proportions'setting

  for (var i = 0; i < [selection count]; i++) {
    var s = [selection objectAtIndex: i]
    s.frame().setConstrainProportions(!s.constrainProportions())
  }
}

Hope this is helpful :)