UIPopoverPresentationController不調用UIAdaptivePresentationControllerDelegate方法

Question

我試圖通過UIPopoverPresentationController在iPad上呈現popover。一切都很好，但似乎沒有UIAdaptivePresentationControllerDelegate的方法被稱爲。

AddRewardController *addRewardVC = [[AddRewardController alloc] initWithNibName:@"AddRewardController" bundle:nil]; 
addRewardVC.modalPresentationStyle = UIModalPresentationPopover; 
addRewardVC.preferredContentSize = CGSizeMake(500, 255); 

UIPopoverPresentationController *popVC = addRewardVC.popoverPresentationController; 
popVC.delegate = self; 
popVC.sourceView = self.view;; 
popVC.sourceRect = CGRectMake(self.view.center.x, self.view.center.y, 1.0f, 1.0f); // present in center of view 
popVC.permittedArrowDirections = 0; //I dont want to show arrow so i set it to 0 

[self presentViewController:addRewardVC animated:YES completion:nil]; 

我的視圖控制器同時實現UIAdaptivePresentationControllerDelegate和UIPopoverPresentationControllerDelegate

我實現UIAdaptivePresentationControllerDelegate委託像這樣（但沒有人叫）

- (UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller { 
    return UIModalPresentationFullScreen; 
} 

- (UIViewController *)presentationController:(UIPresentationController *)controller viewControllerForAdaptivePresentationStyle:(UIModalPresentationStyle)style { 
    UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:controller.presentedViewController]; 
    return navController; 
} 

難道我做錯了什麼，爲什麼它不叫我的委託方法？

Answer 1

使用該委託方法： -

(UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller traitCollection:(UITraitCollection *)traitCollection; 

你的iPhone只執行工作的方法。