I am using Core Data to store a few simple strings related to each user. When the app first starts, everything seems to be fine. The database opens, and I am successfully able to save and retrieve data.
However, after some usage, sometimes the UIManagedDocument I use will just not open when the app starts. Here is the method I use for that (done in the app delegate):
-(void)initManagedDocument{
@try {
NSURL *url = [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
url = [url URLByAppendingPathComponent:@"DataBase"];
self.managedDocument = [[UIManagedDocument alloc] initWithFileURL:url];
if ([[NSFileManager defaultManager] fileExistsAtPath:[url path]]){
[self.managedDocument openWithCompletionHandler:^(BOOL success){
if (success) {
[self documentIsReady];
}else{
NSLog(@"Could not open document");
}
}];
}else{
[self.managedDocument saveToURL:url forSaveOperation:UIDocumentSaveForCreating completionHandler:^(BOOL success){
if (success) {
[self documentIsReady];
}else{
NSLog(@"Could not create document");
}
}];
}
}
@catch (NSException *e) {
}
}
This code gets called from my app's didFinishLaunchingWithOptions. The saveToURL half of the if-statement gets called initially, and returns a success. Then in the following few calls the openWithCompletionHandler: gets called, and returns successfully.
However, at some point after using the app for awhile, the openWithCompletionHandler: returns success = FALSE. I am not sure why, or how the UIManagedDocument gets messed up. The URL still seems to be the same, and the fileExistsAtPath is still returning YES.
Does anyone know why this might be happening? Or if there is a way for me to debug and find out what the actual error is that is causing the open to fail?
