如何使UIPopoverController在旋轉後保持相同的位置？

Question

旋轉後，屏幕上的相同位置無法保持彈出狀態。有沒有什麼好的方法可以做到這一點，因爲在旋轉之後，設置一些框架以實現彈出效果非常可怕。 popover.frame = CGRectMake(someFrame);旋轉彈出窗口只有在屏幕中心時纔會顯示正常。

Answer 1

在這個問題上，Apple有一個Q & A.你可以在這裏找到細節：

Technical Q&A QA1694 Handling Popover Controllers During Orientation Changes

基本上，該技術解釋說，在您的視圖控制器的didRotateFromInterfaceOrientation方法，你將再次出現彈出過如下：

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation 
{ 
    [aPopover presentPopoverFromRect:targetRect.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES]; 
} 

欲瞭解更多信息，閱讀上面的文章，還有UIPopoverController Class Reference：

如果用戶在彈出窗口是vi時旋轉設備sible，彈出窗口 控制器隱藏彈出窗口，然後在 輪換結束時再次顯示它。彈出窗口控制器嘗試爲您適當地定位彈出窗口 ，但在某些情況下，您可能需要再次顯示或將其隱藏 。例如，當從條形圖按鈕項目 中顯示時，彈出窗口控制器會自動調整彈出窗口的位置 （以及可能的大小），以考慮對條形按鈕項目的位置進行更改（ ）。但是，如果在旋轉過程中刪除條形圖按鈕項 ，或者在視圖中顯示目標矩形的彈出框 ，則彈窗控制器不會嘗試 重新定位彈出窗口。在這些情況下，您必須手動隱藏彈出窗口或將其從適當的新位置再次顯示。您可以使用 在didRotateFromInterfaceOrientation中執行此操作：您用於呈現彈出窗口的視圖 控制器。

Answer 2

您可以在didRotateFromInterfaceOrientation:中使用您用來呈現彈出窗口的視圖控制器的方法。

使用setPopoverContentSize:animated:設置彈出窗口大小的方法。

Answer 3

我有我這個

[myPop presentPopoverFromRect:myfield.frame inView:myscrollview permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES]; 

哪裏myfield是要展示你的酥料餅和myscrollview框架解決類似的問題，是在你把你的酥料餅作爲子視圖容器視圖（在我的情況下，其我的scrollview，而不是把inView:self.view我用inView:myscrollview）。

Answer 4

我有同樣的問題。我不是每次通過跟蹤從中呈現它的源矩形/視圖來執行-presentPopoverFromRect，而是將其分類爲UIPopoverController。做完之後，你所要做的就是設置UIBarButtonItem/UIView來自彈出窗口的顯示位置。您甚至可以選擇顯示自定義框架中的彈出窗口，該框架可以作爲NSString值傳入。

CSPopoverController。^ h：

#import <UIKit/UIKit.h> 

// The original popover controller would not re-orientate itself when the orientation change occurs. To tackle that issue, this subclass is created 
@interface CSPopoverController : UIPopoverController 

@property (nonatomic, strong) NSString *popoverDisplaySourceFrame; // Mutually Exclusive. If you want to set custom rect as source, make sure that popOverDisplaySource is nil 
@property (nonatomic, strong) id popoverDisplaySource;    // Mutually exclusive. If UIBarButtonItem is set to it, popoverDisplaySourceFrame is neglected. 
@property (nonatomic, strong) UIView *popoverDisplayView; 

@property (nonatomic, assign, getter = shouldAutomaticallyReorientate) BOOL automaticallyReorientate; 

-(void)reorientatePopover; 

@end 

CSPopoverController.m：

#import "CSPopoverController.h" 

@implementation CSPopoverController 
@synthesize popoverDisplaySourceFrame = popoverDisplaySourceFrame_; 
-(NSString*)popoverDisplaySourceFrame 
{ 
    if (nil==popoverDisplaySourceFrame_) 
    { 
     if (nil!=self.popoverDisplaySource) 
     { 
      if ([self.popoverDisplaySource isKindOfClass:[UIView class]]) 
      { 
       UIView *viewSource = (UIView*)self.popoverDisplaySource; 
       [self setPopoverDisplaySourceFrame:NSStringFromCGRect(viewSource.frame)]; 
      } 
     } 
    } 
    return popoverDisplaySourceFrame_; 
} 
-(void)setPopoverDisplaySourceFrame:(NSString *)inPopoverDisplaySourceFrame 
{ 
    if (inPopoverDisplaySourceFrame!=popoverDisplaySourceFrame_) 
    { 
     popoverDisplaySourceFrame_ = inPopoverDisplaySourceFrame; 
     [self reorientatePopover]; 
    } 
} 
@synthesize popoverDisplaySource = popoverDisplaySource_; 
-(void)setPopoverDisplaySource:(id)inPopoverDisplaySource 
{ 
    if (inPopoverDisplaySource!=popoverDisplaySource_) 
    { 
     [self unlistenForFrameChangeInView:popoverDisplaySource_]; 
     popoverDisplaySource_ = inPopoverDisplaySource; 
     [self reorientatePopover]; 

     if ([popoverDisplaySource_ isKindOfClass:[UIView class]]) 
     { 
      UIView *viewSource = (UIView*)popoverDisplaySource_; 
      [self setPopoverDisplaySourceFrame:NSStringFromCGRect(viewSource.frame)]; 
     } 
     if (self.shouldAutomaticallyReorientate) 
     { 
      [self listenForFrameChangeInView:popoverDisplaySource_]; 
     } 
    } 
} 
@synthesize popoverDisplayView = popoverDisplayView_; 
-(void)setPopoverDisplayView:(UIView *)inPopoverDisplayView 
{ 
    if (inPopoverDisplayView!=popoverDisplayView_) 
    { 
     popoverDisplayView_ = inPopoverDisplayView; 
     [self reorientatePopover]; 
    } 
} 
@synthesize automaticallyReorientate = automaticallyReorientate_; 
-(void)setAutomaticallyReorientate:(BOOL)inAutomaticallyReorientate 
{ 
    if (inAutomaticallyReorientate!=automaticallyReorientate_) 
    { 
     automaticallyReorientate_ = inAutomaticallyReorientate; 
     if (automaticallyReorientate_) 
     { 
      [self listenForAutorotation]; 
      [self listenForFrameChangeInView:self.popoverDisplaySource]; 
     } 
     else 
     { 
      [self unlistenForAutorotation]; 
      [self unlistenForFrameChangeInView:self.popoverDisplaySource]; 
     } 
    } 
} 

-(void)listenForAutorotation 
{ 
    [[NSNotificationCenter defaultCenter] addObserver:self 
              selector:@selector(orientationChanged:) 
               name:UIDeviceOrientationDidChangeNotification 
               object:nil]; 
} 

-(void)unlistenForAutorotation 
{ 
    [[NSNotificationCenter defaultCenter] removeObserver:self 
                name:UIDeviceOrientationDidChangeNotification 
                object:nil]; 
} 

-(void)listenForFrameChangeInView:(id)inView 
{ 
    // Let's listen for changes in the view's frame and adjust the popover even if the frame is updated 
    if ([inView isKindOfClass:[UIView class]]) 
    { 
     UIView *viewToObserve = (UIView*)inView; 
     [viewToObserve addObserver:self 
         forKeyPath:@"frame" 
          options:NSKeyValueObservingOptionNew 
          context:nil]; 
    } 
} 

-(void)unlistenForFrameChangeInView:(id)inView 
{ 
    if ([inView isKindOfClass:[UIView class]]) 
    { 
     UIView *viewToObserve = (UIView*)inView; 
     [viewToObserve removeObserver:self 
          forKeyPath:@"frame"]; 
    } 
} 

// TODO: Dealloc is not called, check why? !!! 
- (void)dealloc 
{ 
    [self unlistenForFrameChangeInView:self.popoverDisplaySource]; 
    [self unlistenForAutorotation]; 
    DEBUGLog(@"dealloc called for CSPopoverController %@", self); 
} 

#pragma mark - Designated initializers 
-(id)initWithContentViewController:(UIViewController *)viewController 
{ 
    self = [super initWithContentViewController:viewController]; 
    if (self) 
    { 
     [self popoverCommonInitializations]; 
    } 
    return self; 
} 

-(void)popoverCommonInitializations 
{ 
    [self setAutomaticallyReorientate:YES]; 
} 

#pragma mark - Frame 
-(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context 
{ 
    if (object==self.popoverDisplaySource) 
    { 
     [self setPopoverDisplaySourceFrame:nil]; 
     [self reorientatePopover]; 
    } 
} 

#pragma mark - Orientation 
-(void)orientationChanged:(NSNotification *)inNotification 
{ 
    [self reorientatePopover]; 
} 

-(void)reorientatePopover 
{ 
    [NSObject cancelPreviousPerformRequestsWithTarget:self 
              selector:@selector(performReorientatePopover) 
               object:nil]; 
// if ([self isPopoverVisible]) 
    { 
     [self performSelector:@selector(performReorientatePopover) 
        withObject:nil 
        afterDelay:0.0]; 
    } 
} 

-(void)performReorientatePopover 
{ 
    if (self.popoverDisplaySourceFrame && self.popoverDisplayView) 
    { 
     [self presentPopoverFromRect:CGRectFromString(self.popoverDisplaySourceFrame) 
           inView:self.popoverDisplayView 
      permittedArrowDirections:UIPopoverArrowDirectionAny 
          animated:YES]; 
    } 
    else if (self.popoverDisplaySource && [self.popoverDisplaySource isKindOfClass:[UIBarButtonItem class]]) 
    { 
     UIBarButtonItem *barButton = (UIBarButtonItem*)self.popoverDisplaySource; 
     [self presentPopoverFromBarButtonItem:barButton 
        permittedArrowDirections:UIPopoverArrowDirectionAny 
            animated:YES]; 
    } 
} 

@end 

用法：

如果是從正在呈現它的UIBarButtonItem：

CSPopoverController *popOverCont = [[CSPopoverController alloc]initWithContentViewController:navCont]; 
self.popOver = popOverCont; 
[popOverCont setPopoverDisplaySource:self.settingsButtonItem]; 

如果從正在呈現酥料餅的一個UIView：

CSPopoverController *popOver = [[CSPopoverController alloc] initWithContentViewController:navigation]; 
self.iPadPopoverController = popOver; 
[newDateVC setIPadPopoverController:self.iPadPopoverController]; 
[popOver setPopoverDisplaySource:inButton]; 
[popOver setPopoverDisplayView:inView]; 

Answer 5

在iOS中7，您可以使用- (void)popoverController:(UIPopoverController *)popoverController willRepositionPopoverToRect:(inout CGRect *)rect inView:(inout UIView *__autoreleasing *)view重新定位你的UIPopoverController對接口的方向變化視圖。

查看UIPopoverControllerDelegatedocumentation。

Answer 6

從iOS 8.0.2開始，willRotateToInterfaceOrientation 將不會產生任何影響。作爲mhrrt提到的，你需要使用的委託方法：

- (void)popoverController:(UIPopoverController *)popoverController willRepositionPopoverToRect:(inout CGRect *)rect inView:(inout UIView *__autoreleasing *)view

因此，舉例來說，如果你希望你的酥料餅的出現正下方被按下一個按鈕，你可以使用下面的代碼：

- (void)popoverController:(UIPopoverController *)popoverController willRepositionPopoverToRect:(inout CGRect *)rect inView:(inout UIView *__autoreleasing *)view 
{ 
    CGRect rectInView = [self.theButton convertRect:self.theButton.frame toView:self.view]; 
    *rect = CGRectMake(CGRectGetMidX(rectInView), CGRectGetMaxY(rectInView), 1, 1); 
    *view = self.view; 
} 

Answer 7

對於iOS> 8約翰Strickers答案有幫助，但沒有做我想做的事情。

這是爲我工作的解決方案。 （如果你想下載一個完整的示例項目，它在這裏：https://github.com/appteur/uipopoverExample）

我創建了一個屬性來容納我想呈現的任何彈出窗口，並且還添加了一個屬性來跟蹤sourceRect，另一個用於查看我想要的按鈕彈出箭頭指向。

@property (nonatomic, weak) UIView *activePopoverBtn; 
@property (nonatomic, strong) PopoverViewController *popoverVC; 
@property (nonatomic, assign) CGRect sourceRect; 

觸發我的彈出窗口的按鈕位於UIToolbar中。點擊時，它會運行以下創建並啓動彈出窗口的方法。

-(void) buttonAction:(id)sender event:(UIEvent*)event 
{ 
    NSLog(@"ButtonAction"); 

    // when the button is tapped we want to display a popover, so setup all the variables needed and present it here 

    // get a reference to which button's view was tapped (this is to get 
    // the frame to update the arrow to later on rotation) 
    // since UIBarButtonItems don't have a 'frame' property I found this way is easy 
    UIView *buttonView   = [[event.allTouches anyObject] view]; 

    // set our tracker properties for when the orientation changes (handled in the viewWillTransitionToSize method above) 
    self.activePopoverBtn  = buttonView; 
    self.sourceRect    = buttonView.frame; 

    // get our size, make it adapt based on our view bounds 
    CGSize viewSize    = self.view.bounds.size; 
    CGSize contentSize   = CGSizeMake(viewSize.width, viewSize.height - 100.0); 

    // set our popover view controller property 
    self.popoverVC = [[UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]] instantiateViewControllerWithIdentifier:@"PopoverVC"]; 

    // configure using a convenience method (if you have multiple popovers this makes it faster with less code) 
    [self setupPopover:self.popoverVC 
     withSourceView:buttonView.superview // this will be the toolbar 
      sourceRect:self.sourceRect 
      contentSize:contentSize]; 

    [self presentViewController:self.popoverVC animated:YES completion:nil]; 

} 

在「setupPopover：withSourceView：sourceRect：contentSize方法是一個簡單的便捷方法，如果你打算顯示多個popovers和希望它們配置的相同設置popoverPresentationController屬性。它的實現如下。

// convenience method in case you want to display multiple popovers 
-(void) setupPopover:(UIViewController*)popover withSourceView:(UIView*)sourceView sourceRect:(CGRect)sourceRect contentSize:(CGSize)contentSize 
{ 
    NSLog(@"\npopoverPresentationController: %@\n", popover.popoverPresentationController); 

    popover.modalPresentationStyle = UIModalPresentationPopover; 
    popover.popoverPresentationController.delegate = self; 
    popover.popoverPresentationController.sourceView    = sourceView; 
    popover.popoverPresentationController.sourceRect    = sourceRect; 
    popover.preferredContentSize         = contentSize; 
    popover.popoverPresentationController.permittedArrowDirections = UIPopoverArrowDirectionDown; 
    popover.popoverPresentationController.backgroundColor   = [UIColor whiteColor]; 
} 

對於iOS 8及以上的viewWillTransitionToSize：withTransitionCoordinator GET就是所謂的視圖時控制器設備旋轉上。

我在呈現視圖控制器類中實現了此方法，如下所示。

// called when rotating a device 
- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator 
{ 
    NSLog(@"viewWillTransitionToSize [%@]", NSStringFromCGSize(size)); 

    // resizes popover to new size and arrow location on orientation change 
    [coordinator animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> _Nonnull context) 
    { 
     if (self.popoverVC) 
     { 
      // get the new frame of our button (this is our new source rect) 
      CGRect viewframe = self.activePopoverBtn ? self.activePopoverBtn.frame : CGRectZero; 

      // update our popover view controller's sourceRect so the arrow will be pointed in the right place 
      self.popoverVC.popoverPresentationController.sourceRect = viewframe; 

      // update the preferred content size if we want to adapt the size of the popover to fit the new bounds 
      self.popoverVC.preferredContentSize = CGSizeMake(self.view.bounds.size.width -20, self.view.bounds.size.height - 100); 
     } 

    } completion:^(id<UIViewControllerTransitionCoordinatorContext> _Nonnull context) { 
     // anything you want to do when the transition completes 
    }]; 
} 

Answer 8

我試過只是設置新的矩形（rect.initialize（...）），它的工作原理。

func popoverPresentationController(popoverPresentationController: UIPopoverPresentationController, willRepositionPopoverToRect rect: UnsafeMutablePointer<CGRect>, inView view: AutoreleasingUnsafeMutablePointer<UIView?>) { 

     if popoverPresentationController.presentedViewController.view.tag == Globals.PopoverTempTag 
     { 
      rect.initialize(getForPopupSourceRect()) 
     } 
    } 

Answer 9

UIPopoverController被棄用ios9贊成UIPopoverPresentationController在iOS8上推出。 （我通過這個轉變從UIActionSheet去UIAlertController時候去也。）你有兩個選擇（OBJ中-C爲例）：

A.採用下面的方法UIViewController（UIKit的改變呈現的大小之前調用此方法視圖控制器的視圖）。

- (void)viewWillTransitionToSize:(CGSize)size 
      withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator { 
     [super viewWillTransitionToSize:size withTransitionCoordinator:coordinator]; 
     [coordinator animateAlongsideTransition:nil 
            completion:^(id<UIViewControllerTransitionCoordinatorContext> _Nonnull context) { 
             // Fix up popover placement if necessary, *after* the transition. 
             // Be careful here if a subclass also overrides this method. 
             if (self.presentedViewController) { 
              UIPopoverPresentationController *presentationController = 
                [self.presentedViewController popoverPresentationController]; 
              UIView *selectedView = /** YOUR VIEW */; 
              presentationController.sourceView = selectedView.superview; 
              presentationController.sourceRect = selectedView.frame; 
             } 
            }]; 
    } 

B.或者，在配置您的UIPopoverPresentationController以呈現時，還請設置其委託。例如您的演示文稿vc可以實現UIPopoverPresentationControllerDelegate並將其自身指定爲委託。然後實現委託方法：

- (void)popoverPresentationController:(UIPopoverPresentationController *)popoverPresentationController 
      willRepositionPopoverToRect:(inout CGRect *)rect 
           inView:(inout UIView * _Nonnull *)view { 
    UIView *selectedView = /** YOUR VIEW */; 
    // Update where the arrow pops out of in the view you selected. 
    *view = selectedView; 
    *rect = selectedView.bounds; 
} 

Answer 10

斯威夫特3：

class MyClass: UIViewController, UIPopoverPresentationControllerDelegate { 


     ... 

     var popover:UIPopoverPresentationController? 

     ... 

     // Where you want to set the popover... 
     popover = YourViewController?.popoverPresentationController 
     popover?.sourceRect = CGRect(x: self.view.bounds.midX, y: self.view.bounds.midY, width: 0, height: 0) 
     popover?.delegate = self 

     ... 

     // override didRotate... 
     override func didRotate(from fromInterfaceOrientation: UIInterfaceOrientation) { 
      popover?.sourceRect = CGRect(x: self.view.bounds.midX, y: self.view.bounds.midY, width: 0, height: 0) 
     } 

} 

Answer 11

對於斯威夫特：

func popoverPresentationController(_ popoverPresentationController: UIPopoverPresentationController, willRepositionPopoverTo rect: UnsafeMutablePointer<CGRect>, in view: AutoreleasingUnsafeMutablePointer<UIView>) 
{ 
    rect.pointee = CGRect(x: self.view.frame.size.width, y: 0, width: 1, height: 1) // Set new rect here 
}