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- (BOOL)createDestinationInstancesForSourceInstance:(NSManagedObject *)sInstance entityMapping:(NSEntityMapping *)mapping manager:(NSMigrationManager *)manager error:(NSError **)error
{
    NSManagedObjectContext *context = [manager destinationContext];
    NSString *entityName [mapping destinationEntityName];
    NSManagedObject *dInstance = [NSEntityDescription insertNewObjectForEntityForName:entityName inManagedObjectContext:context];

    [dInstance setValue:@"value1" forKey:@"anyKey1"];
    [dInstance setValue:@"value2" forKey:@"anyKey2"];
    //…

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//レイヤーを新規作成
CALayer *sublayer = [CALayer layer];
sublayer.backgroundColor = [UIColor blueColor].CGColor;
sublayer.shadowOffset = CGSizeMake(0, 3);
sublayer.shadowRadius = 5.0;
sublayer.shadowColor = [UIColor blackColor].CGColor;
sublayer.shadowOpacity = 0.8;
sublayer.frame = CGRectMake(30, 30, 120, 150);
sublayer.borderColor = [UIColor blackColor].CGColor;
sublayer.borderWidth = 2.0;

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#import <Accelerate/Accelerate.h>
#import <AVFoundation/AVFoundation.h>

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void (^blk)(void) { NSLog(@"in block"); };

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UIView *view1 = [[UIView alloc] initWithFrame:self.view.bounds];
view1.backgroundColor = [UIColor redColor];

UIView *view2 = [[UIView alloc] initWithFrame:self.view.bounds];
view2.backgroundColor = [UIColor blueColor];

[self.view addSubview:view1];
[self.view addSubview:view2];

// 追加と同時に行うとアニメーションしないので、サンプルでは処理をちょっとだけ遅延させています

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// `CAEAGLLayer`を返す例
+ (Class) layerClass
{
    return [CAEAGLLayer class];
}

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// ベースのビュー（これをセンタリングする）
UIView *baseView = [[UIView alloc] init];
[baseView addSubview:label];


// アイコンビュー
UIImage image = [UIImage imageNamed:@"hoge"];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
[baseView addSubview:imageView];

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NSLog(@"%@", [[NSString alloc] initWithData:data
                                   encoding:NSUTF8StringEncoding]);

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AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];

UIWindow *window = nil;

if ([appDelegate respondsToSelector:@selector(window)]) {
    window = [appDelegate window];
}
else {
    window = [[UIApplication sharedApplication] keyWindow];
}

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@interface NSString (sample)

- (NSString *)swapLowercaseString;

@end

////////////////////////////////////////

@implementation NSString (sample)