A.present(B, animated: true, completion: nil)
需要如下操作
A:
func presentButtonDidClick(sender: UIButton) {
let B = BVC()
vc.view.backgroundColor = UIColor(displayP3Red: 1, green: 0, blue: 0, alpha: 0.4)
present(B, animated: true, completion: nil)
}
B:
override func viewDidLoad() {
super.viewDidLoad()
self.modalPresentationStyle = .custom
}
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