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目前具有核心數據的工作,一對多核心數據關係的數據傳遞
下面是我的數據模型:
WorkoutType (One to Many workouts with WorkoutSet)
WorkoutSet (One to Many days with WorkoutDay)
WorkoutDay (One to Many exercises with WorkoutExercise
WorkoutExercise
所有4中的數據通過4個tableviews顯示。
即時通訊使用FetchedResultsController和所有工作正常。
我的下一個問題是,我正在從workoutExerciseTableViewController傳遞到另一個ViewController並漫遊如何將所有數據傳遞給此視圖控制器。比如我需要訪問workoutType,workoutSet和workoutDay數據,這些數據是通過選擇以達到workoutExercise數據。
下面是fetchedResultsController我WorkoutExerciseTableViewController:
-(void)fetchWorkoutExercises
{
NSFetchRequest *fetchRequest = [NSFetchRequest fetchRequestWithEntityName:@"WorkoutExercise"];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"workoutDay = %@", self.workoutDay];
NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"exerciseName" ascending:YES];
[fetchRequest setSortDescriptors:@[sortDescriptor]];
[fetchRequest setPredicate:predicate];
self.fetchedResultsController = [[NSFetchedResultsController alloc]
initWithFetchRequest:fetchRequest managedObjectContext:self.managedObjectContext
sectionNameKeyPath:nil cacheName:nil];
//self.fetchedResultsController.delegate = self;
NSError *error;
if (![self.fetchedResultsController performFetch:&error])
{
NSLog(@"Fetch failed: %@", error);
}
}
感謝提前任何幫助:)
很多再次感謝馬丁。徘徊,如果你有任何想法如何我可以拆分我的實體之一的表視圖爲部分?我試過使用sectionNameKeyPath不幸。 – user2512523
http://stackoverflow.com/questions/18361651/ios-uitableview-sections-with-fetchedresultscontroller- confusion – user2512523