This is a companion discussion topic for the original entry at https://www.raywenderlich.com/4659-drawing-in-ios-with-core-animation-and-core-graphics/lessons/2
This is a companion discussion topic for the original entry at https://www.raywenderlich.com/4659-drawing-in-ios-with-core-animation-and-core-graphics/lessons/2
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It took me a while to figure out the different layers are stacked on top of each other without any differences in their frame ie just as you said they form a hierarchy.
The major difference is that one layer is constrained its bounds and the other (which is used for shadowing purposes) isnβt