旋转后，我无法在屏幕上保持弹出窗口的相同位置。有什么好的方法可以做到这一点，因为在旋转后只是将一些框架设置为弹出框会很糟糕。popover.frame = CGRectMake(someFrame);旋转后弹出框只有在屏幕中央时才看起来不错。
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13 回答
30
苹果有一个关于这个问题的问答。您可以在此处找到详细信息：
基本上，该技术解释了在您的视图控制器的didRotateFromInterfaceOrientation方法中，您将再次呈现弹出窗口，如下所示：
- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
[aPopover presentPopoverFromRect:targetRect.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}
有关更多信息，请阅读上面的文章以及UIPopoverController 类参考：
如果用户在弹出框可见时旋转设备，弹出框控制器会隐藏弹出框，然后在旋转结束时再次显示。弹出框控制器尝试为您适当地定位弹出框，但在某些情况下您可能必须再次显示或完全隐藏它。例如，当从条形按钮项显示时，弹出框控制器会自动调整弹出框的位置（可能还有大小）以考虑条形按钮项位置的变化。但是，如果您在旋转期间移除了条形按钮项目，或者如果您从视图中的目标矩形呈现弹出框，则弹出框控制器不会尝试重新定位弹出框。在这些情况下，您必须手动隐藏弹出框或从适当的新位置再次显示它。
于 2013-04-17T15:50:29.270 回答
17
从 iOS 8.0.2 开始， willRotateToInterfaceOrientation不会有任何效果。正如 mhrrt 提到的，您需要使用委托方法：
- (void)popoverController:(UIPopoverController *)popoverController willRepositionPopoverToRect:(inout CGRect *)rect inView:(inout UIView *__autoreleasing *)view
因此，例如，如果您希望弹出框直接显示在按下的按钮下方，您将使用以下代码：
- (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;
}
于 2014-10-09T13:56:17.483 回答
6
在 iOS 7 中，您可以使用- (void)popoverController:(UIPopoverController *)popoverController willRepositionPopoverToRect:(inout CGRect *)rect inView:(inout UIView *__autoreleasing *)view重新定位 UIPopoverController 的界面方向更改视图。
请参阅UIPopoverControllerDelegate 文档。
于 2014-02-03T12:41:26.637 回答
5
您可以在didRotateFromInterfaceOrientation:用于呈现弹出框的视图控制器的方法中执行此操作。
使用setPopoverContentSize:animated:方法设置弹出框的大小。
于 2012-01-30T14:21:13.027 回答
4
UIPopoverController在 ios9 中被弃用，取而代之的是在 ios8 中引入的 UIPopoverPresentationController。UIActionSheet（从到时，我也经历了这种转变UIAlertController。）您有两种选择（obj-C 中的示例）：
A. 实现UIViewController下面的方法（UIKit 在改变呈现的视图控制器的视图大小之前调用这个方法）。
- (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，在配置你UIPopoverPresentationController的呈现时，也设置它的代表。例如，您的演示 vc 可以实现UIPopoverPresentationControllerDelegate并将自己指定为代表。然后实现委托方法：
- (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;
}
于 2017-01-10T04:13:13.317 回答
4
对于斯威夫特：
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
}
于 2017-07-25T11:19:41.690 回答
2
我试图设置新的矩形（rect.initialize（...））并且它有效。
func popoverPresentationController(popoverPresentationController: UIPopoverPresentationController, willRepositionPopoverToRect rect: UnsafeMutablePointer<CGRect>, inView view: AutoreleasingUnsafeMutablePointer<UIView?>) {
if popoverPresentationController.presentedViewController.view.tag == Globals.PopoverTempTag
{
rect.initialize(getForPopupSourceRect())
}
}
于 2016-02-09T10:45:07.923 回答
1
我有类似的问题，我通过这个解决了
[myPop presentPopoverFromRect:myfield.frame inView:myscrollview permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
myfield您要从中显示弹出框的框架在哪里，并且myscrollview是容器视图，您可以在其中将弹出框添加为子视图（在我的情况下，它是我的滚动视图，而不是放置inView:self.viewI use inView:myscrollview）。
于 2012-05-19T06:16:03.623 回答
1
初始化 PopOver 控制器
var popoverContent: PopoverContentViewController?为 PopOver 控制器编写定义
popoverContent = self.storyboard?.instantiateViewController(withIdentifier: "PopoverContentViewController") as? PopoverContentViewController popoverContent?.modalPresentationStyle = .popover let popover = popoverContent?.popoverPresentationController! popover?.delegate = self popoverContent?.preQuestionInfoPopUpViewDelegateObject = self popover?.permittedArrowDirections = UIPopoverArrowDirection() popover?.sourceView = self.view popover?.sourceRect = CGRect(x: self.view.bounds.midX, y: self.view.bounds.midY, width: 330, height: 330)呈现 PopOver 控制器
self.present（popoverContent，动画：true，完成：nil）
编写以下方法并将新大小分配给弹出框：
覆盖 func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) { let popover = popoverContent?.popoverPresentationController! popover?.sourceRect = CGRect(x: size.width/2, y: size.height/2, width: 0, height: 0) }
于 2019-05-28T10:38:51.683 回答
0
我有同样的问题。我没有通过跟踪呈现它的源矩形/视图来执行-presentPopoverFromRect每次操作，而是将UIPopoverController. 完成后，您所要做的就是设置必须显示弹出框的 UIBarButtonItem / UIView 。您甚至可以选择显示自定义框架中的弹出框，该框可以作为 NSString 值传入。
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：
如果它是您展示它的 UIBarButtonItem ：
CSPopoverController *popOverCont = [[CSPopoverController alloc]initWithContentViewController:navCont];
self.popOver = popOverCont;
[popOverCont setPopoverDisplaySource:self.settingsButtonItem];
如果它是您呈现弹出框的 UIView：
CSPopoverController *popOver = [[CSPopoverController alloc] initWithContentViewController:navigation];
self.iPadPopoverController = popOver;
[newDateVC setIPadPopoverController:self.iPadPopoverController];
[popOver setPopoverDisplaySource:inButton];
[popOver setPopoverDisplayView:inView];
于 2013-10-21T12:29:41.083 回答
0
对于 iOS > 8 John Strickers 的回答有所帮助，但没有做我想做的事。
这是对我有用的解决方案。（如果您想下载完整的示例项目，请访问：https ://github.com/appteur/uipopoverExample ）
我创建了一个属性来保存我想要呈现的任何弹出框，还添加了一个属性来跟踪 sourceRect 和另一个用于查看我希望弹出框箭头指向的按钮的视图。
@property (nonatomic, weak) UIView *activePopoverBtn;
@property (nonatomic, strong) PopoverViewController *popoverVC;
@property (nonatomic, assign) CGRect sourceRect;
触发我的弹出框的按钮位于 UIToolbar 中。当点击它时，它会运行以下方法来创建和启动弹出框。
-(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];
}
'setupPopover:withSourceView:sourceRect:contentSize 方法只是设置 popoverPresentationController 属性的便捷方法，如果您计划显示多个弹出框并希望它们配置相同。它的实现如下。
// 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];
}
对于 iOS 8 及更高版本，viewWillTransitionToSize:withTransitionCoordinator 会在设备旋转时在视图控制器上调用。
我在呈现视图控制器类中实现了这个方法，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
}];
}
于 2015-11-20T00:22:36.773 回答
0
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)
}
}
于 2017-05-21T03:10:07.227 回答
0
我有 popoverPresentationController，我在具有“假”导航栏的视图上呈现。所以我不能将 popoverPresentationController 附加到 barButtonItem。我的弹出窗口出现在正确的位置，但屏幕旋转时没有出现。
所以由于某种原因popoverPresentationController(_ popoverPresentationController: UIPopoverPresentationController, willRepositionPopoverTo rect: UnsafeMutablePointer<CGRect>, in view: AutoreleasingUnsafeMutablePointer<UIView>)没有得到我的召唤。
为了解决这个问题（iOS 12、Swift 4.2），我在调用 present 时在完成闭包中的弹出窗口中添加了约束。现在我的弹出窗口也停留在我期望的位置。
present(viewController, animated: true) { [weak self] in
DDLogDebug(String(describing: viewController.view.frame))
if let containerView = viewController.popoverPresentationController?.containerView,
let presentedView = viewController.popoverPresentationController?.presentedView,
let imageView = self?.headerView.settingsButton {
withExtendedLifetime(self) {
let deltaY:CGFloat = presentedView.frame.origin.y - imageView.frame.maxY
let topConstraint = NSLayoutConstraint.init(item: presentedView, attribute: .top, relatedBy: .equal, toItem: imageView.imageView, attribute: .bottom, multiplier: 1, constant: deltaY)
topConstraint?.priority = UILayoutPriority(rawValue: 999)
topConstraint?.isActive = true
let heightContraint = NSLayoutConstraint.init(item: presentedView, attribute: .height, relatedBy: .equal, toItem: containerView, attribute: .height, multiplier: 0.75, constant: -deltaY)
heightContraint?.isActive = true
let leftConstraint = NSLayoutConstraint.init(item: presentedView, attribute: .left, relatedBy: .equal, toItem: containerView, attribute: .left, multiplier: 1, constant: presentedView.frame.origin.x)
leftConstraint.isActive = true
let widthConstraint = NSLayoutConstraint.init(item: presentedView, attribute: .width, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1, constant: presentedView.frame.width)
widthConstraint.isActive = true
presentedView.translatesAutoresizingMaskIntoConstraints = false
}
}
}
于 2018-10-11T22:30:59.953 回答