This code was working fine, now for some reason I'm getting an NSException error that's generating a SIGABRT at the following line of code...
self.popoverController = [[[UIPopoverController alloc] initWithContentViewController:wbPopOverController] autorelease];
Here's the method it's located in...
-(IBAction)showPop:(id)sender {
//close any open popovers
[self.popoverController dismissPopoverAnimated:NO];
// Initialize wbPopUpViewController
PopoverAircraftClass *wbPopOverController = [[PopoverAircraftClass alloc] initWithNibName:#"PopoverAircraftClass" bundle:[NSBundle mainBundle]];
wbPopOverController.contentSizeForViewInPopover = CGSizeMake(175, 216);
wbPopOverController.delegate = self; //for update
[wbPopOverController setAircraftList:aircraftList withCurrentValue:activeRegistration];
// Object converted to UIPopOverController (retained so we can reference it)
self.popoverController = [[[UIPopoverController alloc] initWithContentViewController:wbPopOverController] autorelease];
self.popoverController.passthroughViews = [NSArray arrayWithObject: self.view];
[self.popoverController presentPopoverFromRect:[sender frame] inView:self.layoutViewIB permittedArrowDirections:UIPopoverArrowDirectionUp animated:NO];
[wbPopOverController release];
}
I'm new at this as you can probably tell. Any ideas as to what's generating the NSException?
Related
I am wanting to loop a local audio file in my Apple Watch App. Currently I am using AVAudioPlayerNode and AVAudioEngine which works well but I cannot figure out how to loop the sound.
I noticed that I can use AVAudioPlayer, which has the handy "numberOfLoops" but, for some reason AVAudioPlayer is not working on the watch. I have no idea why.
Here is my current code to play a sound:
_audioPlayer = [[AVAudioPlayerNode alloc] init];
_audioEngine = [[AVAudioEngine alloc] init];
[_audioEngine attachNode:_audioPlayer];
AVAudioFormat *stereoFormat = [[AVAudioFormat alloc] initStandardFormatWithSampleRate:44100 channels:2];
[_audioEngine connect:_audioPlayer to:_audioEngine.mainMixerNode format:stereoFormat];
if (!_audioEngine.isRunning) {
NSError* error;
[_audioEngine startAndReturnError:&error];
}
NSError *error;
NSBundle* appBundle = [NSBundle mainBundle];
NSURL *url = [NSURL fileURLWithPath:[appBundle pathForResource:#"FILE_NAME" ofType:#"mp3"]];
AVAudioFile *asset = [[AVAudioFile alloc] initForReading:url error:&error];
[_audioPlayer scheduleFile:asset atTime:nil completionHandler:nil];
[_audioPlayer play];
Here is the code i've tried to use for AVAudioPlayer, but does not work:
NSError *audioError;
AVAudioPlayer* player = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:#"FILE_NAME" ofType:#"mp3"]] error:&audioError];
player.numberOfLoops = MAXFLOAT;
player.delegate = self;
[player play];
I am using WatchKit 5.0(+).
You can loop your AVAudioFile by recursively scheduling it:
__block __weak void (^weakSheduleFile)(void);
void (^scheduleFile)(void);
weakSheduleFile = scheduleFile = ^{ [self->_audioPlayer scheduleFile:asset atTime:nil completionHandler:weakSheduleFile]; };
scheduleFile();
I'm not sure if this will be a seamless loop. If it's not, you can try always having two files scheduled:
scheduleFile();
scheduleFile();
If your audio file fits into memory, you could schedule playback as an AVAudioBuffer with the AVAudioPlayerNodeBufferLoops option (N.B. only tested on simulator!):
AVAudioFormat *outputFormat = [_audioPlayer outputFormatForBus:0];
__block AVAudioPCMBuffer *srcBuffer = [[AVAudioPCMBuffer alloc] initWithPCMFormat:asset.processingFormat frameCapacity:(AVAudioFrameCount)asset.length];
if (![asset readIntoBuffer:srcBuffer error:&error]) {
NSLog(#"Read error: %#", error);
abort();
}
AVAudioPCMBuffer *dstBuffer = [[AVAudioPCMBuffer alloc] initWithPCMFormat:outputFormat frameCapacity:(AVAudioFrameCount)asset.length];
AVAudioConverter *converter = [[AVAudioConverter alloc] initFromFormat:srcBuffer.format toFormat:dstBuffer.format];
AVAudioConverterOutputStatus status = [converter convertToBuffer:dstBuffer error:&error withInputFromBlock:^AVAudioBuffer * _Nullable(AVAudioPacketCount inNumberOfPackets, AVAudioConverterInputStatus * _Nonnull outStatus) {
if (srcBuffer) {
AVAudioBuffer *result = srcBuffer;
srcBuffer = NULL;
*outStatus = AVAudioConverterInputStatus_HaveData;
return result;
} else {
*outStatus = AVAudioConverterInputStatus_EndOfStream;
return NULL;
}
}];
assert(status != AVAudioConverterOutputStatus_Error);
[_audioPlayer scheduleBuffer:dstBuffer atTime:nil options:AVAudioPlayerNodeBufferLoops completionHandler:nil];
[_audioPlayer play];
How to resolve this issue.
" (entity: EventDetails; id: 0x155ebe90 ; data: )".
I am using below piece of code to fetch events from my entity.
managedObjectContext = [(AppDelegate *)[[UIApplication sharedApplication] delegate] parentContext];
writerObjectContext = [(AppDelegate *)[[UIApplication sharedApplication] delegate] managedObjectContext];
temporaryContext = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSPrivateQueueConcurrencyType];
temporaryContext.parentContext = managedObjectContext;
[temporaryContext performBlockAndWait:^{
if (temporaryContext == nil) {
managedObjectContext = [(AppDelegate *)[[UIApplication sharedApplication] delegate] parentContext];
writerObjectContext = [(AppDelegate *)[[UIApplication sharedApplication] delegate] managedObjectContext];
NSManagedObjectContext *temporaryContext = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSPrivateQueueConcurrencyType];
temporaryContext.parentContext = managedObjectContext;
}
NSError *error = nil;
NSFetchRequest *request = [NSFetchRequest fetchRequestWithEntityName:#"EventDetails"];
NSArray *arr = [temporaryContext executeFetchRequest:request error:&error];
NSLog(#" %#", arr);
if (![temporaryContext save:&error]) {
NSLog(#"Error in getsize - error:%#",[error userInfo]);
}
[managedObjectContext performBlockAndWait:^{
NSError *error = nil;
if(![managedObjectContext save:&error])
{
NSLog(#"error");
}
[writerObjectContext performBlockAndWait:^{
NSError *error = nil;
if(![writerObjectContext save:&error])
{
NSLog(#"error");
}
}]; // writer
}]; // main
}]; // parent
I runned above code both on my iphone and simulator.But getting same result. How to get rid of this?
data: <fault> (presumably from a log statement) simply means that Core Data did not fetch all the associated data from the database but will make future trips to the store automatically, should the information be needed.
In other words, this is normal behavior. You do not need to worry about it.
In this app, I am using an sqlite database that was created by another app. I can query the database using the Firefox SQLite Manager and see that what I am searching for does exist in the database. I have reduced my query to something very simple, but still get nothing returned in my NSFetchedResultsController.
Here is my code:
- (NSFetchedResultsController*) frc {
if (!frc_) {
#autoreleasepool {
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription * entity = [NSEntityDescription entityForName:#"INDEX" inManagedObjectContext:[ManagedObjectContext moc]];
[fetchRequest setEntity:entity];
[fetchRequest setFetchBatchSize:15];
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"lemma = 'dog'"];
[NSFetchedResultsController deleteCacheWithName:nil];
[fetchRequest setPredicate:predicate];
NSSortDescriptor *sortDescriptor1 = [[NSSortDescriptor alloc] initWithKey:#"lemma" ascending:YES];
NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptor1, nil];
[fetchRequest setSortDescriptors:sortDescriptors];
NSFetchedResultsController *aFetchedResultsController =
[[NSFetchedResultsController alloc]
initWithFetchRequest:fetchRequest
managedObjectContext:[ManagedObjectContext moc]
sectionNameKeyPath:#"lemma"
cacheName:nil];
aFetchedResultsController.delegate = (id<NSFetchedResultsControllerDelegate>)self;
NSError *error = nil;
if (![aFetchedResultsController performFetch:&error]) {
NSLog(#"Unresolved Error %#, %#", error, [error userInfo]);
abort();
}
self.frc = aFetchedResultsController;
}
}
return frc_;
}
There is an entity called "INDEX" in the data model. To confirm that the entity has the lemma property, I show the content of its lemma property, getting this:
po [[entity propertiesByName] objectForKey:#"lemma"]
(id) $3 = 0x1104f740 (<NSAttributeDescription: 0x1104f740>), name lemma, isOptional 1, isTransient 0, entity INDEX, renamingIdentifier lemma, validation predicates (
), warnings (
), versionHashModifier (null)
userInfo {
}, attributeType 700 , attributeValueClassName NSString, defaultValue (null)
Examining the contents of the aFetchedResultsController immediately after the fetch (where it is assigned to self.frc) gives this:
po aFetchedResultsController
(NSFetchedResultsController *) $4 = 0x1105c5c0 <NSFetchedResultsController: 0x1105c5c0>
po [[aFetchedResultsController fetchedObjects] count]
(id) $1 = 0x00000000 <nil>
I suppose the problem here is something very basic, but I don't know what I am overlooking.
I found the answer at the Ray Wenderlich site. The problem is that the sqlite file must be moved from the application bundle to the application documents directory.
This is done by copying it form the bundle into the documents directory if it is not already there.
Here is the code for creating the persistent store coordinator:
- (NSPersistentStoreCoordinator *)pstore {
if (pstore_ != nil) {
return pstore_;
}
NSString *storePath = [[self applicationDocumentsDirectory] stringByAppendingPathComponent: #"words.sqlite"];
NSURL *storeUrl = [NSURL fileURLWithPath: storePath];
// THIS IS THE KEY PIECE TO IMPORTING AN EXISTING SQLITE FILE:
// Put down default db if it doesn't already exist
NSFileManager *fileManager = [NSFileManager defaultManager];
if (![fileManager fileExistsAtPath:storePath]) {
NSString *defaultStorePath = [[NSBundle mainBundle]
pathForResource:#"words" ofType:#"sqlite"];
if (defaultStorePath) {
[fileManager copyItemAtPath:defaultStorePath toPath:storePath error:NULL];
}
}
NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithBool:YES], NSMigratePersistentStoresAutomaticallyOption,
[NSNumber numberWithBool:YES], NSInferMappingModelAutomaticallyOption, nil];
NSError *error = nil;
pstore_ = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:self.mom];
if(![pstore_ addPersistentStoreWithType:NSSQLiteStoreType
configuration:nil URL:storeUrl options:options error:&error]) {
// Error for store creation should be handled in here
}
return pstore_;
}
i m not sure how to describe this as i m new with all the developing and i m really looking forward to an answer from you guys. I know you can be very busy but please try to HELP me!
Here it goes. I have an app that loads a very large database (although it only has 100 entries it contains HiRes images (100MB) ).
At start up a tableview presents the rows -records (using only 3 attributes from the database). However it seems that the WHOLE database (including the images) is loaded at start up!
IS THERE A WAY TO ONLY LOAD THE 3 attributes (something like "select") when the app starts and then when the user moves to didselectrowatindexpath load the rest of the record?
Because i have NO IDEA where to look or what to do i would appreciate some coding help!
here is the code i m using:
#pragma mark -
#pragma mark App support
- (NSFetchedResultsController *)resetFetchedResultsController:(NSPredicate *)predicate cached:(BOOL)cached
{
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:#"Records" inManagedObjectContext:managedObjectContext];
[fetchRequest setEntity:entity];
NSSortDescriptor *partDescriptor = [[NSSortDescriptor alloc] initWithKey:#"displayOrder" ascending:YES];
NSSortDescriptor *nameDescriptor = [[NSSortDescriptor alloc] initWithKey:#"name" ascending:YES];
NSArray *sortDescriptors = [[NSArray alloc] initWithObjects: partDescriptor, nameDescriptor, nil];
[fetchRequest setSortDescriptors:sortDescriptors];
if (predicate != nil)
[fetchRequest setPredicate:predicate];
NSString *cacheName = nil;
if (cached)
cacheName = #"Root";
NSFetchedResultsController *aFetchedResultsController = [[[NSFetchedResultsController alloc]
initWithFetchRequest:fetchRequest
managedObjectContext:managedObjectContext
sectionNameKeyPath:nil
cacheName:cacheName] autorelease];
aFetchedResultsController.delegate = self;
[fetchRequest release];
[partDescriptor release];
[nameDescriptor release];
[sortDescriptors release];
NSError *error = nil;
if (![aFetchedResultsController performFetch:&error]) {
// Handle error
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
exit(-1); // Fail
}
return aFetchedResultsController;
}
- (void)showRecords:(Records *)records animated:(BOOL)animated {
.
RecordsDetailViewController *detailViewController = [[RecordsDetailViewController alloc] initWithStyle:UITableViewStyleGrouped];
detailViewController.records = records;
[self.navigationController pushViewController:detailViewController animated:animated];
[detailViewController release];
}
#pragma mark -
#pragma mark Table view methods
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
cell.backgroundColor = [UIColor lightGrayColor];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
NSInteger count = [[fetchedResultsController sections] count];
if (count == 0) {
count = 1;
}
return count;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
NSInteger numberOfRows = 0;
if ([[fetchedResultsController sections] count] > 0) {
id <NSFetchedResultsSectionInfo> sectionInfo = [[fetchedResultsController sections] objectAtIndex:section];
numberOfRows = [sectionInfo numberOfObjects];
}
return numberOfRows;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *RecordCellIdentifier = #"RecordCellIdentifier";
RecordTableViewCell *recordCell = (RecordTableViewCell *)[tableView dequeueReusableCellWithIdentifier:RecordCellIdentifier];
if (recordCell == nil) {
recordCell = [[[RecordTableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:RecordCellIdentifier] autorelease];
recordCell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
[self configureCell:recordCell atIndexPath:indexPath];
return recordCell;
}
- (void)configureCell:(RecordTableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath {
// Configure the cell
Records *records = (Records *)[fetchedResultsController objectAtIndexPath:indexPath];
cell.records = records;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (self.searchDisplayController.isActive)
[self.tableView reloadData];
Records *records = (Records *)[fetchedResultsController objectAtIndexPath:indexPath];
[self showRecords:records animated:YES];
}
//this is from the RecordTableViewCell.m to show you the attributes i m using:
#pragma mark -
#pragma mark Record set accessor
- (void)setRecord:(Record *)newRecord {
if (newRecord != record) {
[record release];
record = [newRecord retain];
}
imageView.image = [UIImage imageNamed:#"icon.png"];
nameLabel.text = record.name;
overviewLabel.text = record.overview;
partLabel.text = record.part;
}
thanks again...
I would separate the large file from the metadata, because I like to have the freedom to manage these expensive resources seParately. Then I could store them differently, eg filesystem, or http server. This allows me to cache them or send them to remote locAtions proactively to reduce the download times
The rest of the table can then fit in less blocks in the database so less disk access is needed. Many databases do this internally anyway, eg postgresql
You can the just refer to the heavy resource by Id
Ok here it goes. I ve gave up the idea of loading separately the attributes that i need at start up.
What i ve done AND NOW WORKS FLAWLESSLY is to do create RELATIONSHIPS in my model. Images are now loading only when called!
This solution was in my mind but because i had already populated my database it was difficult for me to repeat this step.
However i m glad that i did!
NOW it works as it should!!
Happy Developer!!
This seems like a really simple idea... I have a button that says "load a picture". When that button is clicked I want to remove the current view, load a new one, open the image picker, get the selected picture, and display it in the view that I just loaded. I have read several documents that say UIImagePicker does not work in viewDidLoad, and found one thread that suggested using awakeFromNib instead but even that does not work... here is code. Please help.
In MenuViewController
-(IBAction)loadPictureButtonPressed
{
UIView *parent = [self.view superview];
if(self.loadPictureViewController.view.superview == nil)
{
if(self.loadPictureViewController == nil)
{
LoadPictureViewController *picController = [[LoadPictureViewController alloc]
initWithNibName:#"LoadPictureView" bundle: nil];
self.loadPictureViewController = picController;
[picController release];
}
}
[parent addSubview:self.loadPictureViewController.view];
[self.view removeFromSuperview];
}
In LoadPictureViewController
-(void)awakeFromNib
{
if([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypePhotoLibrary])
{
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentModalViewController:picker animated:YES];
[picker release];
}
else
{
UIAlertView *alert = [[UIAlertView alloc]
initWithTitle:#"Error!"
message:#"Device does not support photo library";
delegate:nil
cancelButtonTitle:#"Ok"
otherButtonTitles:nil];
[alert show];
[alert release];
}
}
Again I have tried placing this code in both viewDidLoad and awakeFromNib. Please help
I simply set an NSTimer in viewDidLoad with a timer of 0 to select the method where I load it.
[NSTimer scheduledTimerWithTimeInterval:0 target:self selector:#selector(camera) userInfo:nil repeats:NO];
Instead of NSTimer, you probably want to use the following in -viewDidLoad,
[self performSelector:#selector(camera) withObject:nil afterDelay:0];