问题
I have a MKMapView (also a UIPopoverControllerDelegate) with Annotations. This MapView has, in the MKTestMapView.h file, a UIPopoverController* popoverController defined in the @interface and a @property (nonatomic, retain) UIPopoverController* popoverController; defined outside of the @interface section. This controller is @synthesized in the MKTestMapView.m file and it is released in the - (void)dealloc section. The Annotations in this MapView have rightCalloutAccessoryViews defined to the following:
- (void)mapView:(MKMapView *)mapView2 annotationView:(MKAnnotationView *)aview calloutAccessoryControlTapped:(UIControl *)control{
...
CGPoint leftTopPoint = [mapView2 convertCoordinate:aview.annotation.coordinate toPointToView:mapView2];
int boxDY=leftTopPoint.y;
int boxDX=leftTopPoint.x;
NSLog(@"\nDX:%d,DY:%d\n",boxDX,boxDY);
popoverController = [[UIPopoverController alloc] initWithContentViewController:controller];
popoverController.delegate = self;
CGSize maximumLabelSize = CGSizeMake(320.0f,600.0f);
popoverController.popoverContentSize = maximumLabelSize;
CGRect rect = CGRectMake(boxDX, boxDY, 320.0f, 600.0f);
[popoverController presentPopoverFromRect:rect inView:self.view permittedArrowDirections:UIPopoverArrowDirectionRight animated:YES];
...
}
Now here comes the fun part. First of all, I am not sure if I need maximumLabelSize and the rect to be the same size. I am new to the popovercontroller so I am playing this by ear..
Okay, the popover shows. Now to dismissing it. I can click anywhere on mapView2 and the popover goes away...but I need the user to click a button in the view if they change anything. URGH!
The docs show:
To dismiss a popover programmatically, call the dismissPopoverAnimated: method of the popover controller.
Well, here is the problem: By definition of how the popoverController works, you are clicking inside the view of the displayed popover (to click the button) but have to trigger the dismissPopoverAnimated: method of the controller that launched this popover view, in my case, the popoverController inside the MKTestMapView.m file.
Now, having said all that, remember, [popoverController release] doesn't happen until:
- (void)dealloc {
[popoverController release];
[mapView release];
[super dealloc];
}
So, do i just do the following inside the button (messy but may work):
(Assuming my popover view is a TableView) In the:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
MKTestMapView * mKTestMapView = [[MKTestMapView alloc] init];
[[mKTestMapView popoverController].dismissPopoverAnimated:YES];
}
Here is my issue: I cannot figure out whether doing the above gives me a reference (if there is such a thing) to the existing view that is on the screen -- and therefore the view that is the owner of that popoverController. If it is as simple as
[[[self parentView] popoverController].dismissPopoverAnimated:YES];
I will shoot myself cos I don't think that is the correct syntax either!
This should be easy...yet I am lost. (probably just frustrated with so many iPad differences that I am learning).
Can anyone explain more?
回答1:
I had the same problem... I had a neat "close" button (X) in the top of my view loaded by the popover, but it didn't work. In my universal app it will be presented as a new view, so that code should stay.
What I did now was that I added the following to my detailedPinView (the view the popover loads):
in the detailedPinView.h file:
@interface detailedPinView : UIViewController {
[...]
UIPopoverController *popover;
[...]
}
-(void)setPopover:(UIPopoverController*)aPopover;
In the detailedPinView.m file:
- (void)setPopover:(UIPopoverController*)aPopover
{
popover = aPopover;
}
The X button closes the view using an IBAction, this is what I did there:
In the detailedPinView.m file:
-(IBAction)releaseDetailedView:(UIButton *)sender
{
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
{
if (popover != nil)
{
[popover dismissPopoverAnimated:YES];
}
else {
NSLog(@"Nothing to dismiss");
}
}
else{
[self.parentViewController dismissModalViewControllerAnimated: YES];
}
}
In the class loading the my map and the popover view I added the following code:
[...]
-(void)mapView:(MKMapView *)theMapView annotationView:(MKAnnotationView *)pin calloutAccessoryControlTapped:(UIControl *)control
{
UIViewController *detailController = [[detailedPinView alloc] initWithNibName:@"detailedPinView"
bundle:nil
annotationView:pin];
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
{
UIPopoverController* aPopover = [[UIPopoverController alloc] initWithContentViewController:detailController];
[aPopover setDelegate:self];
[aPopover setPopoverContentSize:CGSizeMake(320, 320) animated:YES];
[detailController setPopover:aPopover];
[detailController release];
[mapView deselectAnnotation:pin.annotation animated:YES];
self.popoverController = aPopover;
[mapView setCenterCoordinate:pin.annotation.coordinate animated:YES];
[self.popoverController presentPopoverFromRect:CGRectMake(382,498,0,0) inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];
}
else
{
[self presentModalViewController: detailController animated:YES];
}
[detailController release];
}
[...]
I don't know if the was the answer you were hoping for, I think it might be a bit of a messy way to do it... but giving the time schedule this worked like a charm :)
回答2:
Here is another simple solution.
I found that we should follow the following steps for clearly dismissing popovers.
- dismiss a popover.
- release a view loaded by the popover.
Before iOS8, almost all of us may release a view loaded by a popover first, and then we programmatically dismiss the popover. However, in iOS8, we do the steps in revers.
Before iOS8, my code of dismissing a popover
// creating a popover loading an image picker
picker = [[UIImagePickerController alloc] init];
...
pickerPopover = [[UIPopoverController alloc] initWithContentViewController:picker];
[pickerPopover presentPopoverFromRect:aFrame inView:aView permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
// dismissing the popover
[picker.view removeFromSuperview]; // (1) release a view loaded by a popover
[picker release], picker = nil;
if( UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad ) {
[pickerPopover dismissPopoverAnimated:YES]; // (2) dismiss the popover
}
In iOS8, the dismissing code part should be changed as below,
if( UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad ) {
[pickerPopover dismissPopoverAnimated:YES]; // (2) dismiss the popover first
}
[picker.view removeFromSuperview]; // (1) and then release the view loaded by the popover
[picker release], picker = nil;
来源：https://stackoverflow.com/questions/2639350/how-to-dismisspopoveranimated-on-ipad-with-uipopovercontroller-in-mkmapview-sdk