Хорошо,Основные данные не сохраняются: Использование magicalrecord
Я использую Magicalrecord для реализации основных данных. Мое приложение загружает кучу информации при первой загрузке. Эти данные затем сохраняются в основных данных. Это делается в файле AppDelegate. Но, когда мое приложение переходит на задний план или прекращается, данные теряются. Вот didFinishLaunching методом опций:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
NSLog(@"My app is starting");
[MagicalRecord setupAutoMigratingCoreDataStack];
//NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
if (![[NSUserDefaults standardUserDefaults] objectForKey:@"AGM_DataSetup"]) {
NSError* jsonError;
NSArray* json;
Reachability *reachability = [Reachability reachabilityForInternetConnection];
NetworkStatus internetStatus = [reachability currentReachabilityStatus];
if (internetStatus == NotReachable) {
NSLog(@"Offline");
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"static" ofType:@"json"];
NSString *myJSON = [[NSString alloc] initWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:NULL];
json = [NSJSONSerialization JSONObjectWithData:[myJSON dataUsingEncoding:NSUTF8StringEncoding] options:kNilOptions error:&jsonError];
} else {
NSLog(@"Online");
NSData* data = [NSData dataWithContentsOfURL:
aWaterURL];
json = [NSJSONSerialization
JSONObjectWithData:data
options:kNilOptions
error:&jsonError];
}
if (!jsonError) {
[MagicalRecord cleanUp];
NSString* folderPath = [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSError *error = nil;
for (NSString *file in [[NSFileManager defaultManager] contentsOfDirectoryAtPath:folderPath error:&error])
{
[[NSFileManager defaultManager] removeItemAtPath:[folderPath stringByAppendingPathComponent:file] error:&error];
if(error)
{
NSLog(@"Delete error: %@", error.description);
}
}
[MagicalRecord setupCoreDataStackWithAutoMigratingSqliteStoreNamed:@"Anglers411.sqlite"];
NSLog(@"Initial Data Load");
for (id jsonArea in json) {
// Create an area
Area *area = [Area MR_createEntity];
area.name = [jsonArea objectForKey:@"name"];
area.bulletDescription = [jsonArea objectForKey:@"bulletDescription"];
area.uid = [jsonArea objectForKey:@"id"];
NSArray* jsonLocations = [jsonArea objectForKey:@"locations"];
for (id jsonLocation in jsonLocations) {
// create a location
Location *location = [Location MR_createEntity];
location.uid = [jsonLocation objectForKey:@"id"];
location.name = [jsonLocation objectForKey:@"name"];
location.desc = [jsonLocation objectForKey:@"desc"];
location.directions = [jsonLocation objectForKey:@"directions"];
location.bulletDescription = [jsonLocation objectForKey:@"bulletDescription"];
location.area = area;
NSArray* jsonBugs = [jsonLocation objectForKey:@"bugs"];
for (id jsonBug in jsonBugs) {
Bug *bug = [Bug MR_createEntity];
bug.name = [jsonBug objectForKey:@"name"];
bug.spring = [jsonBug objectForKey:@"spring"];
bug.summer = [jsonBug objectForKey:@"summer"];
bug.fall = [jsonBug objectForKey:@"fall"];
bug.winter = [jsonBug objectForKey:@"winter"];
bug.location = location;
}
}
}
[[NSManagedObjectContext MR_defaultContext] MR_saveToPersistentStoreWithCompletion:^(BOOL success, NSError *error) {
if (success) {
NSLog(@"You successfully saved your context.");
} else if (error) {
NSLog(@"Error saving context: %@", error.description);
}
}];
// Set User Default to prevent another preload of data on startup.
[[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"AGM_DataSetup"];
[[NSUserDefaults standardUserDefaults] synchronize];
}
}
return YES;
}
Вот метод я использую в обоих applicationDidEnterBackground и ApplicationWillTerminate:
- (void)saveContext {
[MagicalRecord cleanUp];
}
Спасибо за любую помощь в этом. Я прочитал каждый магический речевой вопрос и не нашел ничего, что сработало.
Заботиться,
Бен