popoverPresentationControllerDidDismissPopover 的替代方法？

Question

我刚刚发现该popoverPresentationControllerDidDismissPopover方法已被弃用。什么是替代方法？

Answer 1

UIPopoverPresentationControllerDelegate协议似乎包括UIAdaptivePresentationControllerDelegate协议，其中有

    // Called on the delegate when the user has taken action to dismiss the presentation successfully, after all animations are finished.
    // This is not called if the presentation is dismissed programatically.
    @available(iOS 13.0, *)
    optional func presentationControllerDidDismiss(_ presentationController: UIPresentationController)

并且presentationControllerDidDismiss()似乎在弹出窗口被解除时被调用。

Answer 2

遗憾的是，苹果的文档没有留下任何提示。我会这样解决事情。

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您设置弹出窗口并获得UIPopoverPresentationController类似的结果：

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UIViewController* controller = [[MyCustomViewController alloc] init];\ncontroller.modalPresentationStyle = UIModalPresentationPopover;\n\n[self presentViewController:controller animated:YES completion:nil];\n\nUIPopoverPresentationController* pc = [controller popoverPresentationController];\npc.sourceView = self.view;\npc.sourceRect = CGRectZero;\n

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这里的对象controller表示由 popover\xe2\x80\x94 自定义视图控制器包装的主视图控制器。我认为最好的选择是重写-viewDidDisappear:自定义视图控制器的方法。当弹出窗口呈现控制器关闭弹出窗口时，将调用该方法。

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- (void)viewDidDisappear:(BOOL)animated\n{\n    [super viewDidDisappear:animated];\n    NSLog(@"%@ - %@", NSStringFromSelector(_cmd), self);\n    // Do the needful.\n}\n

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我认为苹果公司没有提供弃用的理由或如何处理的建议，这对苹果来说是一种耻辱。希望有帮助！

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