ios - 在 Swift 中设置呈现模态的自定义大小失败——占用全屏

Question

如何让呈现模式具有自定义大小？尝试了很多不同的解决方案，其中许多似乎已经过时

这就是我从父 View Controller 实例化模态视图的方式:

self.definesPresentationContext = true
let vc = (storyboard?.instantiateViewController(withIdentifier: "modalViewController"))!
vc.modalPresentationStyle = .overCurrentContext
vc.preferredContentSize = CGSize(width: 100, height: 100)
present(vc, animated: true, completion: nil)

但是，模态视图覆盖了整个屏幕，而不是仅仅占据 100 * 100。

Answer 1

您需要实现 UIViewControllerTransitioningDelegate 方法和 UIViewControllerAnimatedTransitioning 方法来自定义呈现的 UIViewController 大小。

要知道如何实现自定义动画，

引用:https://github.com/pgpt10/Custom-Animator

编辑:

class ViewController: UIViewController
{
    //MARK: Private Properties
    fileprivate let animator = Animator()

    //MARK: View Lifecycle Methods
    override func viewDidLoad()
    {
        super.viewDidLoad()
    }

    override func awakeFromNib()
    {
        super.awakeFromNib()
        self.transitioningDelegate = self
        self.modalPresentationStyle = .custom
    }

    //MARK: Button Action Methods
    @IBAction func dismissController(_ sender: UIButton)
    {
        self.dismiss(animated: true, completion: nil)
    }
}

// MARK: - UIViewControllerTransitioningDelegate Methods
extension ViewController : UIViewControllerTransitioningDelegate
{
    func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning?
    {
        self.animator.transitionType = .zoom
        self.animator.size = CGSize(width: 100, height: 100)
        return self.animator
    }

    func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning?
    {
        return self.animator
    }
}