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let theEventTitleLabel = UILabel()

let newEventLabelSubscriber = Subscribers.Assign(object: theEventTitleLabel, keyPath: \.text)
eventPublisher.subscribe(newEventLabelSubscriber)

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extension Notification.Name {
    static let newEvent = Notification.Name("new_event")
}
 
struct Event {
    let title: String
    let scheduledOn: Date
}
 
let eventPublisher = NotificationCenter.Publisher(center: .default, name: .newEvent, object: nil)

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[1, 2, 3]
        .publisher
        .sink(receiveCompletion: { completion in
            switch completion {
            case .failure(let error):
                print("Something went wrong: \(error)")
            case .finished:
                print("Received Completion")
            }
        }, receiveValue: { value in

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- (void)requestToWriteDataWithFinishBlock:(void (^)(NSError *error))finishBlock
{
    // write permission
    NSArray *writeTypes = @[
                            [HKObjectType quantityTypeForIdentifier:HKQuantityTypeIdentifierStepCount]
                            ];
    
    [self.healthStore requestAuthorizationToShareTypes:[NSSet setWithArray:writeTypes]
                                             readTypes:nil
                                            completion:^(BOOL success, NSError * _Nullable error) {

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#import "HealthKitManager.h"
#import <HealthKit/HealthKit.h>

@interface HealthKitManager ()
@property (nonatomic, retain) HKHealthStore *healthStore;
@end

@implementation HealthKitManager
// shared instance
+ (HealthKitManager *)sharedInstance {

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<key>NSHealthUpdateUsageDescription</key>
	<string>Allow my app to write data on Health application.</string>

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<key>NSHealthShareUsageDescription</key>
	<string>Allow my app to access health data from HealthKit.</string>

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<key>NSHealthShareUsageDescription</key>
	<string>Allow Cubii app to access health data from HealthKit.</string>

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func sizeWithIndex(_ index: Int) -> CGFloat {
        
        switch index {
            case 7:
                return 0.010
            case 3, 11:
                return 0.007
            case 1, 5, 9, 13:
                return 0.005
            default: