Does somebody know why this code is crashing somewhere in the release pool (after 'eject' is called)?
I saw in AVPlayer class reference that the 'currentItem' property is NOT declared as 'retain' http://developer.apple.com/library/ios/documentation/AVFoundation/Reference/AVPlayer_Class/Reference/Reference.html#//apple_ref/doc/uid/TP40009530-CH1-SW21
Is it a bug in the AVPlayer class or should I retain it somewhere else?
Thanks!
- (void) viewDidLoad {
NSURL *url = [NSURL URLWithString:#"http://devimages.apple.com/iphone/samples/bipbop/bipbopall.m3u8"];
playerItem = [[AVPlayerItem alloc] initWithURL:url];
player = [[AVPlayer alloc] initWithPlayerItem:playerItem];
}
- (IBAction) eject {
[player release];
[playerItem release];
}
I typically use this to setup a player:
if (!self.player) {
player = [[AVPlayer alloc] init];
}
[self.player replaceCurrentItemWithPlayerItem:[AVPlayerItem playerItemWithURL:videoURL]];
I believe that AVPlayer retains AVPlayerItem in initWithPlayerItem: function, so you are possibly leaking memory with your AVPlayerItem. "currentItem" is readonly property and should not be "retain" which is only for writable properties.
Related
I'm having a problem that appeared after the big update to iOS 8 and XCode6.
When I try to play sound with AudioToolBox nothing comes out the speakers. I am using the simulator.
I have two variants of the function that plays the sound.
-(void)playSound:(NSString *)fileName
{
SystemSoundID soundEffet = [self soundEffect];
NSURL *soundURL = [[NSBundle mainBundle] URLForResource:fileName withExtension:#"mp3"];
NSString *URLString = [soundURL absoluteString];
if ([[NSFileManager defaultManager] fileExistsAtPath:URLString])
{
AudioServicesCreateSystemSoundID((__bridge CFURLRef)soundURL, &soundEffet);
AudioServicesPlaySystemSound(soundEffet);
} else {
NSLog(#"error, file not found: %#", fileName);
}
}
This fails the file exists at path check.
-(void)playSound:(NSString *)fileName
{
SystemSoundID soundEffet = [self soundEffect];
NSString *path = [[NSBundle mainBundle] pathForResource:fileName ofType:#"mp3"];
if ([[NSFileManager defaultManager] fileExistsAtPath:URLString])
{
NSURL *pathURL = [NSURL fileURLWithPath:path];
AudioServicesCreateSystemSoundID((__bridge CFURLRef)pathURL, &soundEffet);
AudioServicesPlaySystemSound(soundEffet);
} else {
NSLog(#"error, file not found: %#", fileName);
}
}
This one just doesn't play anything.
I am very sure that the file name that I am using is correct.
Does anyone have any ideas about what changed so that these no longer work? And most important: how do I fix this?
So I figured it out! (Cue the flailing kermit arms.) Reinhard Manner's comment is what pointed me in the right direction.
I did indeed end up using AVAudioPlayer. Here's what I ended up with.
-(void)playSound:(NSString *)fileName
{
NSString *soundFilePath = [[NSBundle mainBundle] pathForResource:fileName ofType: #"mp3"];
NSURL *fileURL = [[NSURL alloc] initFileURLWithPath:soundFilePath];
soundPlayer =[[AVAudioPlayer alloc] initWithContentsOfURL:fileURL error:nil];
if (soundPlayer != nil)
{
[soundPlayer play];
} else {
NSLog(#"could not play with file %#", fileName);
}
}
Not included here is the soundPlayer synthesized at the top of the file and made a a property in the .h file.
I still don't know why AudioToolbox stopped working. But this is what works, and I'm going with it.
Also, Reinhard Manner, you may want to post that type of thing as an answer next time, so that you can get more credit!
I would have thought NSFileManagers method of removeItemAtURL:error: would remove the Core Data log files created when using UIManagedDocuments with iCloud.
What is the best way to make sure all of these log files are removed?
I have used...
- (void)deleteRemnantsOfOldDatabaseDocumentAndItsTransactionLogsWithCompletionHandler:(completion_success_t)completionBlock
{
__weak CloudController *weakSelf = self;
NSURL *databaseStoreFolder = self.iCloudDatabaseStoreFolderURL;
NSURL *transactionLogFolder = self.transactionLogFilesFolderURL;
[self deleteFileAtURL:databaseStoreFolder withCompletionBlock:^(BOOL docSuccess) {
[weakSelf deleteFileAtURL:transactionLogFolder withCompletionBlock:^(BOOL logSuccess) {
completionBlock(docSuccess && logSuccess);
}];
}];
}
In conjunction with...
- (void)deleteFileAtURL:(NSURL *)fileURL withCompletionBlock:(completion_success_t)completionBlock
{
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSFileCoordinator *fileCoordinator = [[NSFileCoordinator alloc] initWithFilePresenter:nil];
NSError *coordinatorError = nil;
__block BOOL success = NO;
[fileCoordinator coordinateWritingItemAtURL:fileURL
options:NSFileCoordinatorWritingForDeleting
error:&coordinatorError
byAccessor:^(NSURL *writingURL) {
NSFileManager *fileManager = [[NSFileManager alloc] init];
NSError *removalError = nil;
if ([fileManager fileExistsAtPath:[writingURL path]]) {
if (![fileManager removeItemAtURL:writingURL error:&removalError]) {
NSLog(#"deleteFileAtURL: removal error: %#", removalError);
} else {
success = YES;
}
}
}];
if (coordinatorError) {
NSLog(#"deleteFileAtURL: coordinator error: %#", coordinatorError);
}
completionBlock(success);
});
}
Note: this was used for a single document toolbox style app, and was intended more for clearing out the iCloud container before creating a brand new document, in an 'apparently' empty iCloud store for the first time. But I'm sure it can be adapted without too much work.
Oops, the above won't make sense/work without:
typedef void (^completion_success_t)(BOOL success);
You can debug the contents of your iCloud container and verify things have been removed by using a method like (which to be honest I've probably lifted from somewhere else and modified):
- (void)logDirectoryHierarchyContentsForURL:(NSURL *)url
{
NSFileManager *fileManager = [NSFileManager defaultManager];
NSDirectoryEnumerator *directoryEnumerator = [fileManager enumeratorAtURL:url
includingPropertiesForKeys:#[NSURLNameKey, NSURLContentModificationDateKey]
options:NSDirectoryEnumerationSkipsHiddenFiles
errorHandler:nil];
NSMutableArray *results = [NSMutableArray array];
for (NSURL *itemURL in directoryEnumerator) {
NSString *fileName;
[itemURL getResourceValue:&fileName forKey:NSURLNameKey error:NULL];
NSDate *modificationDate;
[itemURL getResourceValue:&modificationDate forKey:NSURLContentModificationDateKey error:NULL];
[results addObject:[NSString stringWithFormat:#"%# (%#)", itemURL, modificationDate]];
}
NSLog(#"Directory contents: %#", results);
}
And it's also worth logging onto developer.icloud.com and examining what is actually in the iCloud store. There is sometimes a difference between what is retained in the device ubiquity container, and what is actually in the iCloud server folder structure. Between all of these you can get quite a good idea of what's going on.
Hi everybody I have a problem using CoreData Persistence, my problem is, when I launch my application I manage to add some data (from a form within the app) to my DataBase and display them with using NSLog.
But actually I think all these data disappear when I stop the ipad emulator and re launch it after..
So i don't really know if it comes from my code or if it's because of the emulator.
I made a diagram to show you the architecture of my app and my entities:
The problem is that i'm using different viewController so i need to pass the ManagedObjectModel to each one. My form is in the newDocumentViewController, when i add somme entities i would like to access them in all the others viewController and save it to the app local storage.
Here is some code to show you a bit:
AppDelegate.m
#synthesize managedObjectContext = __managedObjectContext;
#synthesize managedObjectModel = __managedObjectModel;
#synthesize persistentStoreCoordinator = __persistentStoreCoordinator;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
DetailViewController *detailViewController = [[DetailViewController alloc] initWithNibName:#"DetailViewController" bundle:nil];
UINavigationController *detailNavigationController = [[UINavigationController alloc] initWithRootViewController:detailViewController];
MasterViewController *masterViewController = [[MasterViewController alloc] initWithNibName:#"MasterViewController" bundle:nil];
UINavigationController *masterNavigationController = [[UINavigationController alloc] initWithRootViewController:masterViewController];
masterViewController.managedObjectContext = self.managedObjectContext;
detailViewController.managedObjectContext = self.managedObjectContext;
I have those properties within each masterViewController and DetailViewController (and from DetailViewController to NewDocumenViewController) to receive the objectContext
#property (nonatomic,strong) NSManagedObjectContext *managedObjectContext;
So with this i don't really know how to access my data from each controller and is the data is stored locally by doing like this:
NewDocumentController.m
-(void) addNewDocument:(NSString*)name with_niveau:(NSInteger)level{
Document *doc = [NSEntityDescription insertNewObjectForEntityForName:#"Document" inManagedObjectContext:managedObjectContext];
doc.nom=name;
doc.niveau=[NSNumber numberWithInteger:level];
}
-(void) addNewDocument_info:(NSString*)name with_createur:(NSString*)createur with_dateModif:(NSDate*)date1 with_status:(BOOL)etat{
DocumentInfo *doc_info = [NSEntityDescription insertNewObjectForEntityForName:#"DocumentInfo" inManagedObjectContext:managedObjectContext];
doc_info.nom =name;
doc_info.createur=createur;
doc_info.date_creation=[NSDate date];
doc_info.date_modification=date1;
doc_info.status= [NSNumber numberWithBool:etat];
}
You need to save your data:
NSError *error = nil;
[self.managedObjectContext save:&error];
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
Can anyone please give me sample code of how sound is played with a UIButton being tapped?
I would like to play an MP3 file using AVAudioPlayer
something like this should get you started. Add this to your view controller, then hook up the button to the playAudio action in interface builder.
in your header .h
#import <AVFoundation/AVFoundation.h>
#interface ClassName {
...
AVAudioPlayer *audioPlayer;
}
#property (nonatomic, retain) AVAudioPlayer *audioPlayer;
- (IBAction) playAudio;
in your .m
#synthesize audioPlayer;
- (IBAction) playAudio {
NSURL *url = [[NSBundle mainBundle] URLForResource:#"audio" withExtension: #"m4a"];
if (!url){NSLog(#"file not found"); return;}
NSError *error;
self.audioPlayer = [[[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error] autorelease];
[audioPlayer play]
}
//ViewController.h ,write below code
#interface ViewController : UIViewController<AVAudioRecorderDelegate,AVAudioPlayerDelegate>
//assign property to player
#property(nonatomic,retain) AVAudioPlayer *player;
//then write in ViewController.m file in ViewDidLoad Method
NSError *soundError;
NSString *path=[[NSBundle mainBundle]pathForResource:#"soundFileName" ofType:#"mp3"]; //.mp3 file for player
NSURL *file=[[NSURL alloc]initFileURLWithPath:path]; //path
_player=[[AVAudioPlayer alloc]initWithContentsOfURL:file error:&soundError]; //player Object
if(_player == nil)
{
NSLog(#"player is empty because of %#",soundError);
}
else
{
[_player play];
_player.volume=1.0;
[_player setDelegate:self];
}
// for stop player you can use
// [_player stop]; //uncomment this line when you wants to stop it.