当视图不在视图层次结构中时启动CAAnimation

let view = UIView()
// 确保视图已经添加到父视图中
superview.addSubview(view)

let animation = CABasicAnimation(keyPath: "position")
animation.fromValue = CGPoint(x: 0, y: 0)
animation.toValue = CGPoint(x: 100, y: 100)
animation.duration = 1.0
view.layer.add(animation, forKey: "positionAnimation")

let layer = CALayer()
layer.frame = CGRect(x: 0, y: 0, width: 100, height: 100)
layer.backgroundColor = UIColor.red.cgColor

let animation = CABasicAnimation(keyPath: "position")
animation.fromValue = CGPoint(x: 0, y: 0)
animation.toValue = CGPoint(x: 100, y: 100)
animation.duration = 1.0
layer.add(animation, forKey: "positionAnimation")

// 将 layer 添加到某个视图的 layer 中
superview.layer.addSublayer(layer)

let view = UIView()
superview.addSubview(view)

DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
    let animation = CABasicAnimation(keyPath: "position")
    animation.fromValue = CGPoint(x: 0, y: 0)
    animation.toValue = CGPoint(x: 100, y: 100)
    animation.duration = 1.0
    view.layer.add(animation, forKey: "positionAnimation")
}