I am trying to do custom migration for CoreData entry. I need to change name and type for an attribute.
So I added new datamodel and mappingmodel. For example, I have myData(String) in old model and I need CarDate(Date) in new model.
I added row: CarDate => $source.myData to the *.xcmappingmodel file and created class:
#implementation RemindersMigration
- (BOOL)createDestinationInstancesForSourceInstance:(NSManagedObject *)sInstance
entityMapping:(NSEntityMapping *)mapping
manager:(NSMigrationManager *)manager
error:(NSError **)error {
NSManagedObject *newObject =
[NSEntityDescription insertNewObjectForEntityForName:[mapping destinationEntityName]
inManagedObjectContext:[manager destinationContext]];
NSString *dateString = [sInstance valueForKey:#"myData"];
NSDateFormatter *formatter = ...;
NSDate *date = [formatter dateFromString:dateString];
[newObject setValue:date forKey:#"CarDate"];
[manager associateSourceInstance:sInstance withDestinationInstance:newObject forEntityMapping:mapping];
return YES;
}
I tested migration with simulator, so I switched to old version with Git, added new entry, switched to new version. In CarDate I have nil.
Please point me where I am wrong?
In the Mapping Model Editor, select the Entity Mapping, open the Utilities pane (right side), and select the Mapping Model Inspector (alt+command+3).
Enter the name of your NSEntityMigrationPolicy subclass (in your case RemindersMigration) in the Custom Policy field.
Related
I'm trying to remove a specific entry on my UITableView. I know the specific indexpath of that entry but I need to delete that entry first in core data. but I could not. this is the code that I am using:
AppDelegate * appDelegateMaster = (AppDelegate*)[[UIApplication sharedApplication] delegate];
self.manageObjectContext = appDelegateMaster.managedObjectContext;
NSManagedObjectContext *contextObj = self.manageObjectContext;
Messages * entryToDelete = [self.fetchResultController objectAtIndexPath:indexPathToRefresh];
[contextObj deleteObject:entryToDelete]; // delete the entry
NSError *error = nil;
if (![contextObj save:&error]) {}
I'm deleting this programmatically so commitEditingStyle is not an issue. this is being done outside tableview's Delegates.
I'd recommend deleting data in the model and then using the callback/delegate methods to run an update on the UI.
Specifically, the NSFetchedResultsController does handle this kind of scenario. If you want to do this manually, then delete the object and reload the tableView (entirely or just the indexpath/section that has been changed)
I am having an issue running GPUImage. I have modified SimpleVideoFileFilter program(replaced the filter with a chromakeyfilter) and am using my own video. My program is terminating due to the following error:
[AVAssetWriter startWriting] Cannot call method when status is 3'
I have gone through the forums but not sure why the moviewriter is closing and then someone is writing to it.
I am using iPhone4 running iOS 7.0
Any clues are greatly appreciated. Thanks much!
Check whether your destination file exists already. If it does, remove it.
I was trying to add the file to a directory which did not exist. Example : /Videos/Video.mov , leaving it just /Video.mov worked.
Ok, I have a few ideas for you.
When you say "it just shows a frame and never plays the video" we have a good indication that your entire processing pipeline from start to finish is functional exactly once, then stops working.
That tells us that you are stringing things together correctly, but some of the components don't exist longer than a single frame buffer cycle, and subsequently the whole process stops.
it looks like filter and movieWriter are scoped to the class (I'm assuming they're not properties from the lack of an underscore, _filter and _movieWriter). So they will live on after this method has finished (correct me if I'm wrong...)
I think where you are encountering trouble is your (GPUImageView*)displayView
This should probably be declared as a class property (although it could work as just a variable) and then instantiated through the nib or the viewDidLoad method of the view controller.
As you have it now, this line: GPUImageView* filterView = (GPUImageView*)displayView; is making an assignment for filterView which is not used (and therefore unnecessary). It's not clear if displayView really is an instance of GPUImageView or if it will still be in existence when the current method finishes. (in fact you say it "is a UIView that I have programmatically created")
displayView will have to be a subclass of GPUImageView for this whole thing to work, and it will have to be scoped to the class, and not the method.
Declare it like this:
#property (strong, nonatomic)GPUImageView* displayView;
and then instantiate it and add it to your view hierarchy from within viewDidLoad
movieFile1 = [[GPUImageMovie alloc] initWithURL:movieFileURL1];
movieFile2 = [[GPUImageMovie alloc] initWithURL:movieFileURL2];
movieFile2.runBenchmark = YES;
movieFile2.playAtActualSpeed = NO;
filter = [[GPUImageChromaKeyBlendFilter alloc] init];
[(GPUImageChromaKeyBlendFilter *)filter setColorToReplaceRed:0.0 green:1.0 blue:0.0];
[(GPUImageChromaKeyBlendFilter *)filter setThresholdSensitivity:0.4];
GPUImageView *filterView = (GPUImageView*)displayView;
[filter addTarget:displayView];
[movieFile1 addTarget:filter];
[movieFile2 addTarget:filter];
NSString *pathToMovie = [NSHomeDirectory() stringByAppendingPathComponent:#"Documents/Movie.m4v"];
unlink([pathToMovie UTF8String]);
NSURL *movieURL = [NSURL fileURLWithPath:pathToMovie];
movieWriter = [[GPUImageMovieWriter alloc] initWithMovieURL:movieURL size:CGSizeMake(1920.0, 1280.0)];
[filter addTarget:movieWriter];
movieWriter.shouldPassthroughAudio = YES;
movieFile1.audioEncodingTarget = movieWriter;
[movieFile1 enableSynchronizedEncodingUsingMovieWriter:movieWriter];
[movieWriter startRecording];
[movieFile1 startProcessing];
[movieFile2 startProcessing];
[movieWriter setCompletionBlock:^{
[filter removeTarget:movieWriter];
[movieWriter finishRecording];
}];
if (outputPath) {
finalURL = [[stongObj tempFileURL] copy];
DebugLog(#"Start Filter Processing :%#",finalURL);
DebugLog(#"movieUrl :%#",movieUrl);
// [CSUtils removeChuckFilePaths:#[outputPath]];
//Create Image Movie Object
_movieFile = [[GPUImageMovie alloc] initWithURL:outputPath];
//_movieFile = [[GPUImageMovie alloc] initWithURL:[[NSBundle mainBundle] URLForResource:#"videoviewdemo" withExtension:#"mp4"]];
_movieFile.runBenchmark = NO;
_movieFile.playAtActualSpeed = YES;
_movieFile.delegate = self;
//Movie Writer Object
_movieWriter = [[GPUImageMovieWriter alloc] initWithMovieURL:finalURL size:CGSizeMake([UIScreen mainScreen].bounds.size.height,[UIScreen mainScreen].bounds.size.height)];
//_movieWriter.delegate = self;
//Create Selecetive GPU Image Filter
[stongObj setGpuOutputFilter:selectedVideoFilterType];
//Create Group Filter
groupFilter = [[GPUImageFilterGroup alloc] init];
[groupFilter addTarget:imageOutputFilter];
// Only Single Filter is implemented.
//Apply Initial and Terminal Filter
[(GPUImageFilterGroup *)groupFilter setInitialFilters:[NSArray arrayWithObject:imageOutputFilter]];
[(GPUImageFilterGroup *)groupFilter setTerminalFilter:imageOutputFilter];
//_movieWriter -> groupFilter ->_movieFile
[_movieFile addTarget:groupFilter];
[groupFilter addTarget:_movieWriter];
_movieWriter.shouldPassthroughAudio = YES;
_movieFile.audioEncodingTarget = _movieWriter;
[_movieFile enableSynchronizedEncodingUsingMovieWriter:_movieWriter];
//Start Recording
[_movieWriter startRecording];
//Start Processing
[_movieFile startProcessing];
__weak typeof(self) weekSelf=self;
[_movieWriter setCompletionBlock:^{
__strong typeof(self) stongSelf=weekSelf;
DebugLog(#"Movie Write Completed");
//Finish Recording.
[stongSelf.movieWriter finishRecording];
//Release all object
// [self releaseAllObject];
//remove movieUrl,audioUrl,outputPath
[CSUtils removeChuckFiles:#[movieUrl,audioUrl,outputPath]];
}];
[_movieFile startProcessing]; app get crash in iOS 8 on this line but working fine on iOS 7
#Seasia Creative ,I have no enough reputation to add a comment by that list,I create a new list to answer U.
I check the output URL,console log "/var~~~~/tmpmerge.mp4",so i realize that ,i miss a "/" --->"/var~~~~/tmp/merge.mp4".
If the url is no correct, project runs into the same error.
hope to help some.
I have an NSPersistentDocument subclass using NSManagedObject subclasses for my data.
When a new document is opened, I do some initializing of data structures (trivial amount of populating fields). What I've noticed is that the Untitled document gets autosaved, and when the application re-opens, that document gets loaded. If the application quits, the user doesn't (by default) get prompted with the save dialog. If the window closes, the user does.
First question:
I want to call up the save dialog when the user quits the application. I don't want this Untitled document hanging around (under normal circumstances). I either want it saved or trashed.
I attempted to fill out:
- (void)applicationWillTerminate:(NSNotification *)aNotification
In order to trigger the document to be saved. Calling save: on the context at this point gives an error. From what I can tell, this is because the user hasn't yet saved the file on their own. In addition, calling [self close]; or [[self windowForSheet] close]; close the window without saving.
How can I force the save dialog to come up? How can I trash the untitled document?
Second question (no, I can't count):
Since when the application starts, there may or may not be an Untitled document to deal with, I'm trying to keep track of the state in another model. I've already found that the initial data (to which I referred earlier) is present when the Untitled document came up. My other model has some metadata, including a success flag/state for the populated data. Once the populated data is all in place and correct, the state indicates as such. Unfortunately, while my populated data is being loaded when the app starts with a pre-existing Untitled document, the metadata class is not.
Please excuse the roughness of the code, at this point, I'm mucking it up until I can see that it's working how I want before I polish it back off:
- (bool) createGameState {
NSEntityDescription* description = [NSEntityDescription entityForName:[GameState name] inManagedObjectContext:[self managedObjectContext]];
NSFetchRequest* req = [[NSFetchRequest alloc] init];
[req setEntity:description];
NSError *error = nil;
NSArray *array = [[self managedObjectContext] executeFetchRequest:req error:&error];
[req release];
req = nil;
GameState* result = nil;
if (array) {
NSUInteger count = [array count];
if (!count) {
// Create the new GameState.
DebugLog(#"Creating GameState");
result = [NSEntityDescription insertNewObjectForEntityForName:[GameState name] inManagedObjectContext:[self managedObjectContext]];
[result setIsLoaded:[NSNumber numberWithBool:NO]];
} else {
if (count > 1) {
NSLog(#"WARNING: Potentially Corrupt Game State. found: %lu", count);
}
result = [array objectAtIndex:0];
if ([result isLoaded]) {
[self variantLoaded];
} else {
// In this case, we have an aborted set-up. Since the game isn't
// playable, just refuse to create the GameState. This will
// force the user to create a new game.
return NO;
}
}
} else {
DebugLog(#"error: %#", error);
}
[game setState:result];
return result;
}
Note that array is always present, and count is always zero. No, I'm not explicitly calling save: anywhere. I'm relying on the standard auto-save, or the user performing a save.
EDIT:
I installed the Core Data Editor app. It turns out the issue isn't on saving the data, but on loading it. (Note: Due to another issue, the app saves as binary when instructed to save as XML, which causes much head banging.)
I've broken it down to the simplest code, which should pick up all objects of type GameState in an array. It retrieves none, despite there clearly being objects of the appropriate type in the saved file:
NSManagedObjectContext* moc = [self managedObjectContext];
NSEntityDescription* entity = [NSEntityDescription entityForName:#"GameState" inManagedObjectContext:moc];
NSFetchRequest* req = [[NSFetchRequest alloc] init];
[req setEntity:entity];
NSError *error = nil;
NSArray *array = [moc executeFetchRequest:req error:&error];
Array is not null, but [array count] is 0.
At this point, I'm guessing it's something simple that I'm overlooking.
Second EDIT:
I added -com.apple.CoreData.SQLDebug 5 and saved as SQLite. The call to executeFetchRequest does not generate any debug logs. I do see the INSERT INTO ZGAMESTATE entry show up in the logs. It seems that executeFetchRequest is not getting passed to the backend.
Third EDIT (this one burns):
I created a new xcode project, using core data (as I had with the other). I copied just this one function (stubbing where necessary) and plopped a call to it in windowControllerDidLoadNib. In this new project, the code above works.
Found the problem.
I errantly was loading objects in Document's - (id) init call. Moved to windowControllerDidLoadNib (which is what I did in the test version) and it worked fine.
I'm trying to implement a getter on one of my db classes. But when I execute the following line of code, where "obj" is an NSManagedObject:
return [obj valueForKey:#"activationData"];
I get the following NSUnknownKeyException:
'[ valueForUndefinedKey:]: the entity Blueprint is not key value coding-compliant for the key "activationData".'
I just recently added a String attribute named "activationData" to my "Blueprint" entity using Xcode. But when I run the app the NSManagedObject that represents Blueprint entities does not include the new "activationData" attribute, which apparently is the cause of the crash.
The NSManagedObject looks like this, but I expected it to show the new Attribute along with the createDate, name and order attributes:
<NSManagedObject: 0x5138c90> (entity: Blueprint; id: 0x513a2e0 <x-coredata://8C586BB8-B9E7-4FD7-84CB-5CE66FB221E6/Blueprint/p2> ; data: {
createDate = "2012-02-21 15:49:00 +0000";
name = "Feb 17 test";
order = 2;
})
Fyi, user1226119's answer (below) reminded me that I used the Organizer to extract the sqlite db from my device and inspect it with SQLite Manager to verify things. Sure enough there is still no new activationData field in the Blueprint table. The table looks the same as it always did.
I think I must have missed some necessary step for adding a new Attribute to an existing db Entity.
Your model has not change in your app. You must delete your old application and re-deploy your app on your device.
The solution was to update the pathForResource method call in the code that returns the NSManagedObjectModel. I had indeed created a new xcdatamodel version of the db before adding the attribute, but apparently you are supposed to refer to it using the following code, which retrieves the model your app will use.
- (NSManagedObjectModel *)managedObjectModel {
if (managedObjectModel != nil) {
return managedObjectModel;
}
NSString *path = [[NSBundle mainBundle] pathForResource:#"MyDB Version5" ofType:#"mom" inDirectory:#"ASSIST.momd"];
NSURL *momURL = [NSURL fileURLWithPath:path];
managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:momURL];
return managedObjectModel;
}
I had to put the new database version's name ("MyDB Version5") as the pathForResource parameter. Previously it was "MyDB Version5".
Not sure if this is the right place (I am sure someone will let me know if it is not) I have a iPhone application that has a UITableview that is backed by core data. I want to perform a reducing search so that only the items starting with the characters entered into the search bar are shown. This is normally done with the delegate - (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText no problem. I am a little confused as I am new to Core Data how to do this. One of the big problems as I see it is going to be updating the interface to let it know what to present. I assume an alternative NSFetchedResultsController needs to be sent to the UITableView is that correct?
So here are my issues:
1) I assume I need to create a NSFetchedResultsController with only the correct items in it then tell the UITableView to use this as the dataSource and reload the table?
2) is there a better way than executing a full sorted fetch and removing those objects that do not conform. ie is there a way of doing a select where type fetch?
Thanks in advance and sorry if this is a dumb question.
Regards
Damien
Yes, you will need a new NSFetchedResultsController.
You should use a NSPredicate in your new NSFetchRequest to filter by your search text.
For example, if your managed objects have a field "name" that should be filtered:
NSPredicate *pred = [NSPredicate predicateWithFormat:#"%K beginswith[c] %#", #"name", searchText];
[fetchRequest setPredicate:pred];
I used a slightly different solution: instead of relying on a different NSFetchedResultsController, I created a NSMutableArray (filteredListContent) in my table view controller, used to store the temporary data, as inspired by Apple sample code and Mugunth Kumar's tutorial.
In tableView:cellForRowAtIndexPath:, returning the appropriate data-source array:
if(receivedTableView == self.searchDisplayController.searchResultsTableView){
Objects* object = [self.filteredListContent objectAtIndex:indexPath.row];
cell.textLabel.text = object.name;
} else {
Objects* object = [self.unfilteredListContent objectAtIndex:indexPath.row];
cell.textLabel.text = object.name;
}
As in Apple's sample code, add pretty much the same method in other methods, such as
- (NSInteger)tableView:(UITableView *)receivedTableView numberOfRowsInSection:(NSInteger)section {
if(receivedTableView == self.searchDisplayController.searchResultsTableView){
return [self.filteredListContent count];
}
return [self.unfilteredListContent count];
}
As well as in tableView:didSelectRowAtIndexPath:...
Then conformed to UISearchDisplayDelegate protocol and added the following methods:
- (void)filterContentForSearchText:(NSString*)searchText
{
if (!self.filteredListContent) {
self.filteredListContent = self.filteredListContent = [[NSMutableArray alloc] init];
}
[self.filteredListContent removeAllObjects];
for (Objects *object in [self.coreDataStuffVariable.fetchedResultsController fetchedObjects])
{
NSPredicate *predicate = [NSPredicate predicateWithFormat:
#"(SELF contains[cd] %#)", searchText];
NSString * elementTitle = [NSString stringWithFormat:#"%#", object.name];
[elementTitle compare:searchText options:NSCaseInsensitiveSearch];
if([predicate evaluateWithObject:elementTitle])
{
[self.filteredListContent addObject:password];
}
}
}
- (BOOL)searchDisplayController:(UISearchDisplayController *)controller
shouldReloadTableForSearchString:(NSString *)searchString{
[self filterContentForSearchText:searchString];
// Return YES to cause the search result table view to be reloaded.
return YES;
}
Pretty simple. I guess it can end up badly if the core data objects are reloaded during a search, but well... if you can sleep knowing that then it may be a good solution!