Canvas scaler does not work when the UI is Instantiated at runtime

Question

My canvas scaler does not work when the UI is instantiated dynamically.

It does work well in iPhone 6.5 inch simulator:

The problem is when I use 5.5 inch or smaller simulator:

It does not follow the Canvas scaler to resize.

How can I fix this problem?

Answer 1

set worldPositionStays to false as a second parameter to SetParent.

YourUI.transform.SetParent(canvas.transform, false);