0xMarK

- (void) viewWillAppear:(BOOL)animated {    
    UIToolbar* toolbar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 50)];
    toolbar.barStyle = UIBarStyleBlackTranslucent;
    toolbar.items = [NSArray arrayWithObjects:
                           [[UIBarButtonItem alloc]initWithTitle:@"Previous" style:UIBarButtonItemStyleBordered target:self action:@selector(previous:)],
                           [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil],
                           [[UIBarButtonItem alloc]initWithTitle:@"Next" style:UIBarButtonItemStyleDone target:self action:@selector(next:)],
                           nil];
    [toolbar sizeToFit];
    for (UIView * view in self.view.subviews) {

0xMarK

// Create mask layer
UIImage *maskImage = [UIImage imageNamed:@"posterMask"];
CAShapeLayer* maskLayer = [CAShapeLayer layer];
maskLayer.frame = CGRectMake(0, 0, maskImage.size.width,maskImage.size.height);
maskLayer.contents = (__bridge id)maskImage.CGImage;
self.poster.layer.mask = maskLayer;

0xMarK

CAShapeLayer *maskLayer = [CAShapeLayer layer];
maskLayer.frame = CGRectMake(0, 0, self.poster.frame.size.width, self.poster.frame.size.height);

UIBezierPath* bezierPath = [UIBezierPath bezierPath];
[bezierPath moveToPoint:CGPointMake(0.0, 5.0)];
[bezierPath addArcWithCenter:CGPointMake(5.0, 5.0) radius:5.0 startAngle:DEGREES_TO_RADIANS(180) endAngle:DEGREES_TO_RADIANS(-90) clockwise:YES];
[bezierPath addLineToPoint:CGPointMake(107.0, 0.0)];
[bezierPath addArcWithCenter:CGPointMake(107.0, 5.0) radius:5.0 startAngle:DEGREES_TO_RADIANS(-90) endAngle:DEGREES_TO_RADIANS(0) clockwise:YES];
[bezierPath addLineToPoint:CGPointMake(112.0, 89.0)];
[bezierPath addArcWithCenter:CGPointMake(107.0, 89.0) radius:5.0 startAngle:DEGREES_TO_RADIANS(0) endAngle:DEGREES_TO_RADIANS(90) clockwise:YES];

0xMarK

UIBezierPath* bezierPath = [UIBezierPath bezierPath];
[bezierPath moveToPoint:CGPointMake(0.0, 5.0)];
[bezierPath addArcWithCenter:CGPointMake(5.0, 5.0) radius:5.0 startAngle:DEGREES_TO_RADIANS(180) endAngle:DEGREES_TO_RADIANS(-90) clockwise:YES];
[bezierPath addLineToPoint:CGPointMake(5.0, 20.0)];
[bezierPath closePath];

CAShapeLayer *shape = [CAShapeLayer layer];
shape.frame = self.poster.bounds;
shape.path = bezierPath.CGPath;
shape.fillColor = [UIColor clearColor].CGColor;

0xMarK

// Mask
CAShapeLayer *maskLayer = [CAShapeLayer layer];
maskLayer.fillRule = kCAFillRuleEvenOdd;
maskLayer.frame = CGRectMake(0, 0, self.notificationsTabBarButton.frame.size.width, self.notificationsTabBarButton.frame.size.height);

CGPoint circleCenter = self.notificationsBadge.center;
CGFloat innerCircleRadius = self.notificationsBadge.frame.size.width/2;
CGFloat circleRadius = innerCircleRadius + 2;

UIBezierPath *circlePath = [UIBezierPath bezierPathWithArcCenter:circleCenter radius:circleRadius startAngle:0.0 endAngle:M_PI * 2.0 clockwise:YES];

0xMarK

class MyDefaults: BindableObject {
    public var didChange: AnyPublisher<Bool, Never>
    
    init() {
        let defaults = UserDefaults.standard
        didChange = Publishers.Merge(
            defaults.publisher(for: \.userOption1),
            defaults.publisher(for: \.userOption2)
        )
        .receive(on: RunLoop.main)

0xMarK

class MyDataModel: BindableObject {
    var didChange = PassthroughSubject<Void, Never>()
}

extension MyDataModel: NSFetchedResultsControllerDelegate {
    func controllerDidChangeContent(_ controller: NSFetchedResultsController<NSFetchRequestResult>) {
        didChange.send()
    }
}

0xMarK

class ChatViewController: UIViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        collectionView.transform = CGAffineTransform.reversed
        // .........
    }
    
}

0xMarK

func factorialRecursive(_ number: Int) -> Int {
    if number < 3 {
        return  number
    }
    return number * factorialRecursive(number - 1)
}

func factorialIterative(_ number: Int) -> Int {
    var result = 1
    for i in (2...number) {

0xMarK

func fibonacciRecursive(_ index: Int) -> Int {
    if index < 2 {
        return index
    }
    return fibonacciRecursive(index - 2) + fibonacciRecursive(index - 1)
}

func fibonacciIterative(_ index: Int) -> Int {
    if index < 2 {
        return index