The problem appears when I pressed MKUserTrackingBarButtonItem for tracking user location and then leave the view.
Profiler shows zombie:
[CLLocationManager onClientEventLocation]
I have no CLLocationManager but MKMapView, which I set to nil when exit:
- (void)viewDidUnload
{
[self setMapToolbar:nil];
mapView.delegate = nil;
[self setMapView:nil];
[super viewDidUnload];
}
As I finally understand MKMapView showUserLocation method creates an instance of CLLocationManager.
Easily avoid this zombie by turning userLocation off when quit view:
- (void)viewWillDisappear:(BOOL)animated
{
[mapView setShowsUserLocation:NO];
[super viewWillDisappear:animated];
}
Related
I am working on my first iCloud App. After working for a while the app cannot access a UIManagedDocument any more due to an "UIDocumentStateSavingError". Is there any way to actually find out what error occurred?
This is my code to create the UIManagedDocument:
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
iCloudURL = [[NSFileManager defaultManager] URLForUbiquityContainerIdentifier:nil];
if (iCloudURL == nil) {
dispatch_async(dispatch_get_main_queue(), ^{
[self iCloudNotAvailable];
});
return;
}
iCloudDocumentsURL = [iCloudURL URLByAppendingPathComponent:#"Documents"];
iCloudCoreDataLogFilesURL = [iCloudURL URLByAppendingPathComponent:#"TransactionLogs"];
NSURL *url = [iCloudDocumentsURL URLByAppendingPathComponent:#"CloudDatabase"];
iCloudDatabaseDocument = [[UIManagedDocument alloc] initWithFileURL:url];
NSMutableDictionary *options = [NSMutableDictionary dictionary];
NSString *name = [iCloudDatabaseDocument.fileURL lastPathComponent];
[options setObject:name forKey:NSPersistentStoreUbiquitousContentNameKey];
[options setObject:iCloudCoreDataLogFilesURL forKey:NSPersistentStoreUbiquitousContentURLKey];
iCloudDatabaseDocument.persistentStoreOptions = options;
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(documentContentsChanged:) name:NSPersistentStoreDidImportUbiquitousContentChangesNotification object:iCloudDatabaseDocument.managedObjectContext.persistentStoreCoordinator];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(documentStateChanged:) name:UIDocumentStateChangedNotification object:iCloudDatabaseDocument];
if ([[NSFileManager defaultManager] fileExistsAtPath:[iCloudDatabaseDocument.fileURL path]]) {
// This is true, the document exists.
if (iCloudDatabaseDocument.documentState == UIDocumentStateClosed) {
[iCloudDatabaseDocument openWithCompletionHandler:^(BOOL success) {
if (success) {
dispatch_async(dispatch_get_main_queue(), ^{
[self documentConnectionIsReady];
});
} else {
dispatch_async(dispatch_get_main_queue(), ^{
[self connectionError:iCloudConnectionErrorFailedToOpen];
});
}
}];
} else if (iCloudDatabaseDocument.documentState == UIDocumentStateNormal) {
...
}
} else {
...
}
});
The Document already exists and thus openWithCompletionHandler: is called on the document. This fails and the UIDocumentStateChangedNotification is fired which shows a document states of 5:
UIDocumentStateClosed and
UIDocumentStateSavingError
After this the completion block gets called. What is correct way to proceed from here? Is there any way to find out what went wrong and what kind of error occurred?
I tried to re-open the document in the completion block but the result is the same.
I guess I could solve the problem by just deleting the file and recreate it. But this is obviously not an option once the app will be out in the store. I would like to know what is going wrong and give the user an appropriator way to handle the problem.
I already checked other questions here handling the UIDocumentStateSavingError (there a not a lot of them) but the seem not to be applicable for the problem here.
Any idea how I can find out what the problem is? I cannot belive that the API tells you "Something went wrong during saving but I will not tell you what!"
You can query the documentState in the completion handler. Unfortunately, if you want the exact error, the only way to get it is to subclass and override handleError:userInteractionPermitted:
Maybe something like this would help (typed freehand without compiler)...
#interface MyManagedDocument : UIManagedDocument
- (void)handleError:(NSError *)error
userInteractionPermitted:(BOOL)userInteractionPermitted;
#property (nonatomic, strong) NSError *lastError;
#end
#implementation MyManagedDocument
#synthesize lastError = _lastError;
- (void)handleError:(NSError *)error
userInteractionPermitted:(BOOL)userInteractionPermitted
{
self.lastError = error;
[super handleError:error
userInteractionPermitted:userInteractionPermitted];
}
#end
Then in you can create it like this...
iCloudDatabaseDocument = [[UIManagedDocument alloc] initWithFileURL:url];
and use it in the completion handler like this...
[iCloudDatabaseDocument openWithCompletionHandler:^(BOOL success) {
if (success) {
dispatch_async(dispatch_get_main_queue(), ^{
[self documentConnectionIsReady];
});
} else {
dispatch_async(dispatch_get_main_queue(), ^{
[self connectionError:iCloudConnectionErrorFailedToOpen
withError:iCloudDatabaseDocument.lastError];
});
}
}];
Based on #JodyHagins excellent snippet, I have made a UIDocument subclass.
#interface SSDocument : UIDocument
- (void)openWithSuccess:(void (^)())successBlock
failureBlock:(void (^)(NSError *error))failureBlock;
#end
#interface SSDocument ()
#property (nonatomic, strong) NSError *lastError;
#end
#implementation SSDocument
- (void)handleError:(NSError *)error userInteractionPermitted:(BOOL)userInteractionPermitted {
self.lastError = error;
[super handleError:error userInteractionPermitted:userInteractionPermitted];
}
- (void)clearLastError {
self.lastError = nil;
}
- (void)openWithSuccess:(void (^)())successBlock failureBlock:(void (^)(NSError *error))failureBlock {
NSParameterAssert(successBlock);
NSParameterAssert(failureBlock);
[self clearLastError];
[self openWithCompletionHandler:^(BOOL success) {
if (success) {
successBlock();
} else {
NSError *error = self.lastError;
[self clearLastError];
failureBlock(error);
}
}];
}
#end
I've spent many hours trying to figure how to do this:
Having a placemark/annotation in the centerCoordinate of your mapView, when you scroll the map, the placemark should always stays in the center.
I've seen another app doing this too!
Found my question in How to add annotation on center of map view in iPhone?
There's the answer :
If you want to use an actual annotation instead of just a regular view positioned above the center of the map view, you can:
use an annotation class with a settable coordinate property (pre-defined MKPointAnnotation class eg). This avoids having to remove and add the annotation when the center changes.
create the annotation in viewDidLoad
keep a reference to it in a property, say centerAnnotation
update its coordinate (and title, etc) in the map view's regionDidChangeAnimated delegate method (make sure map view's delegate property is set)
Example:
#interface SomeViewController : UIViewController <MKMapViewDelegate> {
MKPointAnnotation *centerAnnotation;
}
#property (nonatomic, retain) MKPointAnnotation *centerAnnotation;
#end
#implementation SomeViewController
#synthesize centerAnnotation;
- (void)viewDidLoad {
[super viewDidLoad];
MKPointAnnotation *pa = [[MKPointAnnotation alloc] init];
pa.coordinate = mapView.centerCoordinate;
pa.title = #"Map Center";
pa.subtitle = [NSString stringWithFormat:#"%f, %f", pa.coordinate.latitude, pa.coordinate.longitude];
[mapView addAnnotation:pa];
self.centerAnnotation = pa;
[pa release];
}
- (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated {
centerAnnotation.coordinate = mapView.centerCoordinate;
centerAnnotation.subtitle = [NSString stringWithFormat:#"%f, %f", centerAnnotation.coordinate.latitude, centerAnnotation.coordinate.longitude];
}
- (void)dealloc {
[centerAnnotation release];
[super dealloc];
}
#end
Now this will move the annotation but not smoothly. If you need the annotation to move more smoothly, you can add a UIPanGestureRecognizer and UIPinchGestureRecognizer to the map view and also update the annotation in the gesture handler:
// (Also add UIGestureRecognizerDelegate to the interface.)
// In viewDidLoad:
UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:#selector(handleGesture:)];
panGesture.delegate = self;
[mapView addGestureRecognizer:panGesture];
[panGesture release];
UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:#selector(handleGesture:)];
pinchGesture.delegate = self;
[mapView addGestureRecognizer:pinchGesture];
[pinchGesture release];
- (void)handleGesture:(UIGestureRecognizer *)gestureRecognizer
{
centerAnnotation.coordinate = mapView.centerCoordinate;
centerAnnotation.subtitle = [NSString stringWithFormat:#"%f, %f", centerAnnotation.coordinate.latitude, centerAnnotation.coordinate.longitude];
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
//let the map view's and our gesture recognizers work at the same time...
return YES;
}
I have the following code but can't compile it because I have a "Type name requires a specifier or qualifier" error" for (self).
How to fix this error? I have compared it with the original code and there are no differences, so I don't know what's going on.
#import "CurrentTimeViewController.h"
#implementation CurrentTimeViewController
{
// Call the superclass's designated initializer
self = [super initWithNibName:#"CurrentTimeViewController"
bundle:nil];
if (self) {
// Get the tab bar item
UITabBarItem *tbi = [self tabBarItem];
// Give it a label
[tbi setTitle:#"Time"];
}
return self;
}
Here is the code from the mirror file HynososViewController.h, and which I cut, pasted and modified:
#import "HypnososViewController.h"
#implementation HypnososViewController
- (id) init
{
// Call the superclass's designated initializer
self = [super initWithNibName:nil
bundle:nil];
if (self) {
// Get the tab bar item
UITabBarItem *tbi = [self tabBarItem];
// Give it a label
[tbi setTitle:#"Hypnosis"];
}
return self;
}
- (id) initWithNibName:(NSString *)nibName bundle:(NSBundle *)nibBundle
{
// Disregard parameters - nib name is an implementation detail
return [self init];
}
// This method gets called automatically when the view is created
- (void)viewDidLoad
{
[super viewDidLoad];
NSLog(#"Loaded the view for HypnosisViewController");
// Set the background color of the view so we can see it
[[self view] setBackgroundColor:[UIColor orangeColor]];
}
#end
Here is the complete code for CurrentTimeViewController.h:
#import "CurrentTimeViewController.h"
#implementation CurrentTimeViewController
{
// Call the superclass's designated initializer
self = [super initWithNibName:#"CurrentTimeViewController"
bundle:nil];
if (self) {
// Get the tab bar item
UITabBarItem *tbi = [self tabBarItem];
// Give it a label
[tbi setTitle:#"Time"];
}
return self;
}
- (id) initWithNibName:(NSString *)nibName bundle:(NSBundle *)Bundle
{
// Disregard parameters - nib name is an implementation detail
return [self init];
}
// This method gets called automatically when the view is created
- (void)viewDidLoad
{
[super viewDidLoad];
NSLog(#"Loaded the view for CurrentTimeViewController");
// Set the background color of the view so we can see it
[[self view] setBackgroundColor:[UIColor greenColor]];
}
#end
Is the code above a cut-and-paste of EXACTLY what you are trying to compile? If so, I think you are missing something very important that would make that code block a method implementation:
-(id)init // This, or something like it, is missing???
{
...
}
Check your code, here, and in your project. :-)
i want to show leaderbord in my own game ....i am using following method for that but noting happen ... i am confuse with rootview controller as my game is developed in cocos2d so there is nothing like dat :(
// Leaderboards
-(void) showLeaderboard
{
if (isGameCenterAvailable == NO)
return;
GKLeaderboardViewController* leaderboardVC = [[[GKLeaderboardViewController alloc] init] autorelease];
if (leaderboardVC != nil)
{
leaderboardVC.leaderboardDelegate = self;
[self presentViewController:leaderboardVC];
}
}
///
-(void) leaderboardViewControllerDidFinish:(GKLeaderboardViewController*)viewController
{
[self dismissModalViewController];
[delegate onLeaderboardViewDismissed];
}
///////
-(UIViewController*) getRootViewController
{
return [UIApplication sharedApplication].keyWindow.rootViewController;
}
///
-(void) presentViewController:(UIViewController*)vc
{
UIViewController* rootVC = [self getRootViewController];
[rootVC presentModalViewController:vc animated:YES];
}
////
-(void) dismissModalViewController
{
UIViewController* rootVC = [self getRootViewController];
[rootVC dismissModalViewControllerAnimated:YES];
}
...
regards
Haseeb
i dont know but it work for me.if anyone can describe the real reason for why this working in this way i will be very glad....i call it through appdelegate
[(myAppDelegate*)[[UIApplication sharedApplication] delegate]gameCenter];
and from appdelegate i call rootviewcontroller method like
-(void)gameCenter
{
[rootViewController gameCenterLeaderboard];
}
and in rootviewcontroller there is a method
-(void)gameCenterLeaderboard
{
GKLeaderboardViewController* leaderboardVC = [[[GKLeaderboardViewController alloc] init] autorelease];
if (leaderboardVC != nil) {
leaderboardVC.leaderboardDelegate = self;
[self presentModalViewController: leaderboardVC animated: YES];
}
}
the following method is also override in rootviewcontroller
- (void)leaderboardViewControllerDidFinish:(GKLeaderboardViewController *)leaderboardController
{
[self dismissModalViewControllerAnimated:YES];
}
If you don't have a root UIViewController then I'd recommend creating a new UIViewController set it's view to your openGLView then use that view controller to present the leaderboard as a modal view controller.
UIViewController *leaderboardViewController = [[UIViewController alloc] init];
[leaderboardViewController setView:[[CCDirector sharedDirector] openGLView]];
[leaderboardViewController presentModalViewController:leaderboardVC animated:YES]; //leaderboardVC is your GKLeaderboardViewController
I have created navigation based project. and in second screen i want to add uitabbarcontroller. so can any one suggest how i do this.
i already did lot of search but no success yet. so please can you provide a simple sample of this. i already tried below discussion but i think its not a good approach.
Navigation Based Application with TabBar
Thanks
Actually this is the correct approach. The one thing that is not correct is where the controllers are allocated. This is happened in the previous controller, the one that is making the push, but should be allocated in the object that is responsible, the TabBarController.
When you implement your action to show the UITabBarController make the following code:
- (void) theAction {
SomeTabBarControllerSubClass *controller = [[SomeTabBarControllerSubClass alloc] init];
[self.navigationController pushViewController:controller animated:YES];
[controller release];
}
Then when you implement the SomeTabBarControllerSubClass class:
(.h)
#interface SomeTabBarControllerSubClass : UITabBarController {
UIViewController *first;
UIViewController *second;
}
#end
(.m)
#implementation SomeTabBarControllerSubClass
- (void) viewDidLoad {
first = [[UIViewController alloc] init]; //Or initWithNib:
second = [[UIViewController alloc] init];
first.view.backgroundColor = [UIColor greenColor] //Just example
second.view.backgroundColor = [UIColor redColor] //Just example
first.tabBarItem.image = [UIImage imageNamed:#"someImage.png"];
self.viewControllers = [NSArray arrayWithObjects:first,second,nil];
}
- (void) dealloc {
[first dealloc];
[second dealloc];
[super dealloc];
}
#end