我试图在另一个视图控制器上呈现模式视图控制器，该视图控制器的大小为父视图控制器的一半.但它总是以全屏显示.
我已经在我的故事板中创建了具有固定帧大小的自由形式大小的视图控制器.320 X 250.
var storyboard = UIStoryboard(name: "Main", bundle: nil)
var pvc = storyboard.instantiateViewControllerWithIdentifier("CustomTableViewController") as ProductsTableViewController
self.presentViewController(pvc, animated: true, completion: nil)
我试着设定一个框架.superview和它没有帮助.
请给出建议.
你可以用UIPresentationController来实现这一点.
为此，您让演示ViewController实现UIViewControllerTransitioningDelegate，并为半尺寸演示返回PresentationController:
func presentationController(forPresented presented: UIViewController, presenting: UIViewController?, source: UIViewController) -> UIPresentationController? {
return HalfSizePresentationController(presentedViewController: presented, presenting: presentingViewController)
}
演示时，将演示样式设置为.Custom，并将过渡代理设置为:
pvc.modalPresentationStyle = .custom
pvc.transitioningDelegate = self
演示控制器仅返回演示视图控制器的帧:
class HalfSizePresentationController: UIPresentationController {
override var frameOfPresentedViewInContainerView: CGRect {
guard let bounds = containerView?.bounds else { return .zero }
return CGRect(x: 0, y: bounds.height / 2, width: bounds.width, height: bounds.height / 2)
}
}
以下是完整的工作代码:
class ViewController: UIViewController, UIViewControllerTransitioningDelegate {
@IBAction func tap(sender: AnyObject) {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let pvc = storyboard.instantiateViewController(withIdentifier: "CustomTableViewController") as! UITableViewController
pvc.modalPresentationStyle = .custom
pvc.transitioningDelegate = self
pvc.view.backgroundColor = .red
present(pvc, animated: true)
}
func presentationController(forPresented presented: UIViewController, presenting: UIViewController?, source: UIViewController) -> UIPresentationController? {
return HalfSizePresentationController(presentedViewController: presented, presenting: presentingViewController)
}
}
class HalfSizePresentationController: UIPresentationController {
override var frameOfPresentedViewInContainerView: CGRect {
guard let bounds = containerView?.bounds else { return .zero }
return CGRect(x: 0, y: bounds.height / 2, width: bounds.width, height: bounds.height / 2)
}
}