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Core Data Helper
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// | |
// CoreDataHelper.m | |
// Wired In | |
// | |
// Created by Caleb Hicks on 6/20/14. | |
// | |
// Readme: I use a version of this file in each Core Data project I create. It runs as a Shared Instance. | |
// Simply, it returns the default Managed Object Context for the app. Sample methods also provided to save, create sample | |
// data, and log all data within the app. Adjust the Imports and related methods for your model objects. | |
// | |
// Enjoy! Any questions? Comment below or @calebhicks on Twitter. | |
#import "CoreDataHelper.h" | |
#import "WIAppDelegate.h" | |
#import "WIRoundController.h" | |
#import "Tag.h" | |
#import "Task.h" | |
#import "Round.h" | |
@implementation CoreDataHelper | |
+ (CoreDataHelper *)sharedInstance { | |
static CoreDataHelper *sharedInstance = nil; | |
static dispatch_once_t onceToken; | |
dispatch_once(&onceToken, ^{ | |
sharedInstance = [CoreDataHelper new]; | |
}); | |
return sharedInstance; | |
} | |
- (NSManagedObjectContext *)managedObjectContext{ | |
WIAppDelegate *appDelegate = [UIApplication sharedApplication].delegate; | |
NSManagedObjectContext *managedObjectContext = appDelegate.managedObjectContext; | |
return managedObjectContext; | |
} | |
- (void) save{ | |
[self.managedObjectContext save:nil]; | |
} | |
-(void)setUpSampleData: (NSInteger)withIdentifier{ | |
Tag *tag = [NSEntityDescription insertNewObjectForEntityForName:@"Tag" inManagedObjectContext:[[CoreDataHelper sharedInstance] managedObjectContext]]; | |
tag.tagName = [NSString stringWithFormat: @"awesomeTag %ld", (long)withIdentifier]; | |
Round *round = [NSEntityDescription insertNewObjectForEntityForName:@"Round" inManagedObjectContext:[[CoreDataHelper sharedInstance] managedObjectContext]]; | |
round.duration = @1200; | |
round.startTime = [NSDate dateWithTimeInterval:0 sinceDate:[NSDate date]]; | |
round.endTime = [NSDate dateWithTimeInterval:1200 sinceDate:[NSDate date]]; | |
round.roundDescription = [NSString stringWithFormat: @"Round Description %ld", (long)withIdentifier]; | |
Task *task = [NSEntityDescription insertNewObjectForEntityForName:@"Task" inManagedObjectContext:[[CoreDataHelper sharedInstance] managedObjectContext]]; | |
task.duration = @1200; | |
task.startTime = [NSDate dateWithTimeInterval:0 sinceDate:[NSDate date]]; | |
task.finishTime = [NSDate dateWithTimeInterval:1200 sinceDate:[NSDate date]]; | |
task.taskName = [NSString stringWithFormat:@"task name %ld", (long)withIdentifier]; | |
task.complete = @1; | |
round.tasks = [NSSet setWithArray: @[task]]; | |
task.tags = [NSSet setWithArray: @[tag]]; | |
} | |
- (void)logCurrentData{ | |
NSFetchRequest* roundRequest = [NSFetchRequest fetchRequestWithEntityName:@"Round"]; | |
NSArray *rounds = [[[CoreDataHelper sharedInstance]managedObjectContext] executeFetchRequest:roundRequest error:NULL]; | |
for (Round *round in rounds) { | |
NSLog(@"Round Description: %@", round.roundDescription); | |
for (Task *task in round.tasks) { | |
NSLog(@"Task Named: %@", task.taskName); | |
for (Tag *tag in task.tags) { | |
NSLog(@"Tag Named: %@", tag.tagName); | |
} | |
} | |
} | |
} | |
@end |
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