iOS 13 modalPresentationStyle = UIModalPresentationFullScreen 不适用于 MFMessageComposeViewController
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【中文标题】iOS 13 modalPresentationStyle = UIModalPresentationFullScreen 不适用于 MFMessageComposeViewController【英文标题】:iOS 13 modalPresentationStyle = UIModalPresentationFullScreen not working for MFMessageComposeViewController 【发布时间】:2019-11-25 11:51:37 【问题描述】:从 ios 13+ 的模态显示样式中我们都知道,普通 UIViewController 将默认为 .pageSheet。如果您想更改它,您可以在展示时将其更改为您想要的样式。我在我的应用程序中使用 MFMailComposeViewController 和 MFMessageComposeViewController 来共享内容。在 MFMailComposeViewController 的情况下,当我选择 modalPresentationStyle = .fullScreen 时,它工作得非常好...... 但对于 MFMessageComposeViewController 则不然。请在下面找到代码sn-p
if (MFMessageComposeViewController.canSendText())
let controller = MFMessageComposeViewController()
controller.body = “Message Body”
controller.messageComposeDelegate = self
controller.modalPresentationStyle = .fullScreen
self.present(controller, animated: true, completion: nil)
self.trackEvent(shareType: "SMS")
【问题讨论】:
我的回答对你没有帮助? @Alex.Pinhasov 这很有帮助,但我不是在寻找自定义实现,我只是在检查我是否以错误的方式进行操作。但它似乎与MFMailComposeViewController 本身有问题。 @iGauravK 你能告诉我,你解决了这个问题吗?以及如何? @UsamaAzam 由于模态演示样式在这种情况下不起作用,而且我不想要任何自定义转换,所以答案是否定的。 【参考方案1】:虽然我无法回答您关于 *为什么不能将 .fullScreen 用于 MFMessageComposeViewController 的问题,但我可以告诉您,如果您实现自己的自定义转换,您将获得所需的行为。
这是您为视图控制器设置自定义转换的方式:
var customTransitionDelegate = CustomTransition(presentAnimation: CustomActionSheetPresentationTransition(), dismissAnimation: CustomActionSheetDismissalTransition())
if (MFMessageComposeViewController.canSendText())
let controller = MFMessageComposeViewController()
controller.body = "Message Body"
controller.messageComposeDelegate = self
controller.modalPresentationStyle = .custom
controller.transitioningDelegate = customTransitionDelegate
self.present(controller, animated: true, completion: nil)
您还应该遵守委托并检查结果以在用户单击取消后将其关闭:
func messageComposeViewController(_ controller: MFMessageComposeViewController, didFinishWith result: MessageComposeResult)
switch result
case .cancelled:
self.presentedViewController?.dismiss(animated: true, completion: nil)
default: break
表示逻辑
class CustomActionSheetPresentationTransition: NSObject, UIViewControllerAnimatedTransitioning
private let duration = 0.6
func animateTransition(using transitionContext: UIViewControllerContextTransitioning)
guard let fromView = transitionContext.viewController(forKey: .from) else return
guard let toView = transitionContext.viewController(forKey: .to) else return
var screenOffUp = CGAffineTransform()
let container = transitionContext.containerView
screenOffUp = CGAffineTransform(translationX: 0, y: -fromView.view.frame.height)
toView.view.frame = CGRect(x: 0, y: UIScreen.main.bounds.height, width: fromView.view.frame.width, height: fromView.view.frame.height)
toView.view.center.x = container.center.x
container.addSubview(toView.view)
UIView.animate(withDuration: duration, delay: 0.0, usingSpringWithDamping: 0.8, initialSpringVelocity: 0.8, options: [], animations:
toView.view.transform = screenOffUp
, completion: (success) in
transitionContext.completeTransition(success)
)
func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval
return duration
解雇逻辑
class CustomActionSheetDismissalTransition: NSObject, UIViewControllerAnimatedTransitioning
private let duration = 0.8
func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval
return duration
func animateTransition(using transitionContext: UIViewControllerContextTransitioning)
guard let fromView = transitionContext.viewController(forKey: .from) else return
let screenOffDown = CGAffineTransform(translationX: 0, y: fromView.view.frame.height)
UIView.animate(withDuration: duration, delay: 0.0, usingSpringWithDamping: 0.8, initialSpringVelocity: 0.8, options: [], animations:
fromView.view.transform = screenOffDown
, completion: (success) in
transitionContext.completeTransition(success)
)
【讨论】:
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