如何在情節提要中創建彈出窗口-iOS

Question

我正在使用情節提要創建iPhone應用程序。 在本文中，如何在情節提要板上創建彈出窗口，以及如何在viewcontroller上添加和關閉此彈出窗口。

彈出示例圖片：

我想像這樣在情節提要中添加彈出窗口：

Answer 1

您可以像這樣創建它（不要忘記將<UIPopoverControllerDelegate>添加到呈現視圖控制器類中）

UIStoryboard* storyboard = [UIStoryboard storyboardWithName : @"MainStoryboard" bundle : nil];
    MyCustomPopoverContentVC* customContentViewController = [storyboard instantiateViewControllerWithIdentifier : @"MyCustomPopoverContentVC"];

// initialize popover controller with content view controller
UIPopoverController* popoverController = [[UIPopoverController alloc] initWithContentViewController: anyCustomViewController];
popoverController.delegate = self;
// change popoverContentSize here
CGRect contentFrame = CGRectMake(0.0, 0, 500.0, 500.0);
popoverController.popoverContentSize = contentFrame.size;
// present popover controller
[popoverController presentPopoverFromRect: _buttonRectForPopoverController inView: self.view permittedArrowDirections: UIPopoverArrowDirectionUp animated: YES];

在呈現視圖控制器類的其他地方，有一個示例“ UIPopoverControllerDelegate”方法：

// refreshes the rect from where the popover is shown after interface orientations.
// this method is necessary and recommended by apple's documentation
- (void) popoverController : (UIPopoverController*) popoverController willRepositionPopoverToRect : (inout CGRect*) rect inView : (inout UIView*__autoreleasing*) view
{
    *rect = _buttonRectForPopoverController;
}