UIView.animate(duration:animations:) を呼んだその場所から普通に呼ばれてます (edited) * frame #0: 0x0000000104483a9c Test`closure #1 in closure #1 in ViewController.viewDidLoad(self=0x0000000132f08d90) at ViewController.swift:42:17 frame #1: 0x0000000104483b80 Test`thunk for @escaping @callee_guaranteed () -> () at <compiler-generated>:0 frame #2: 0x000000018529b5b0 UIKitCore`+[UIView _setupAnimationWithDuration:delay:view:options:factory:animations:start:animationStateGenerator:completion:] + 576 (edited)