爲什麼不調用UIViewControllerTransitioningDelegate方法presentationControllerForPresentedViewController？

我想使用自定義的UIPresentationController。對於它，當我想表明新的場景我把這個代碼爲什麼不調用UIViewControllerTransitioningDelegate方法presentationControllerForPresentedViewController？

UIViewController *cv = [[...]]; 

cv.transitionManager=[[MyTransition alloc] init]; 
cv.transitioningDelegate=actionSheet.transitionManager; 
cv.modalTransitionStyle = UIModalPresentationCustom; 

[self presentViewController:cv animated:YES completion:^{ 

}];

我的過渡經理方法：

#pragma mark - UIViewControllerTransitioningDelegate 

- (id <UIViewControllerAnimatedTransitioning>)animationControllerForPresentedController:(UIViewController *)presented presentingController:(UIViewController *)presenting sourceController:(UIViewController *)source{ 
    return self; 
} 

- (id <UIViewControllerAnimatedTransitioning>)animationControllerForDismissedController:(UIViewController *)dismissed{ 
    return self; 
} 

- (id <UIViewControllerInteractiveTransitioning>)interactionControllerForPresentation:(id <UIViewControllerAnimatedTransitioning>)animator{ 
    return nil; 
} 

- (id <UIViewControllerInteractiveTransitioning>)interactionControllerForDismissal:(id <UIViewControllerAnimatedTransitioning>)animator{ 
    return self; 
} 


- (UIPresentationController *)presentationControllerForPresentedViewController:(UIViewController *)presented presentingViewController:(UIViewController *)presenting sourceViewController:(UIViewController *)source { 
    MyPresentationController *presentationController = [[MyPresentationController alloc] initWithPresentedViewController:presented presentingViewController:presenting]; 
    return presentationController; 
}

但該方法presentationControllerForPresentedViewController不來電！

爲什麼？

來源

2014-10-22 Vit

它只會如果你現在使用UIModalPresentationCustom呈現樣式

來源

2014-12-09 13:48:16 Silmaril

他使用UIModalPresentationCustom – litso 2015-12-22 23:41:57

@litso確實被調用。我不知道我是如何錯過的，爲什麼我的回答會被接受。作者可能會實現UIViewControllerTransitioningDelegate方法，但不符合此協議。 – Silmaril 2015-12-23 09:15:03

modalPresentationStyle代替modalTransitionStyle一個視圖控制器是一個正確的答案:)

來源

2016-01-14 17:10:02 mientus

哇，我一直在使用自定義轉換一段時間，有時候事情變得很奇怪，我不知道爲什麼。有modalPresentationStyle和modalTransitionStyle ... – 2016-03-09 19:05:02

爲什麼不調用UIViewControllerTransitioningDelegate方法presentationControllerForPresentedViewController？

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