boherna

// an ivar for your class:
BOOL animating;

- (void)spinWithOptions:(UIViewAnimationOptions)options
{
   // this spin completes 360 degrees every 2 seconds
   [UIView animateWithDuration: 0.5f
                         delay: 0.0f
                       options: options
                    animations: ^{

boherna

// To be placed in the parent viewcontroller which will push the viewcontroller where the back button should be blank
self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:nil action:nil];

boherna

- (UIWindow *)findKeyboardWindow
{
	UIWindow *keyboardWindow = nil;
	for (UIWindow *window in [[UIApplication sharedApplication] windows])
	{
		if ([NSStringFromClass([window class]) isEqualToString:@"UITextEffectsWindow"])
		{
			keyboardWindow = window;
			break;
		}

boherna

CATransition *animation = [CATransition animation];
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
animation.type = kCATransitionFade;
animation.duration = 0.75;
[aLabel.layer addAnimation:animation forKey:@"kCATransitionFade"];

// The current text will fade to new text.
aLabel.text = @"new text";

boherna

The proper way to fade a UILabel (or any UIView for that matter) is to use a Core Animation Transition. This will not flicker, nor will it fade to black if the content is unchanged.

A portable and clean solution is to use a Extension in Swift (invoke prior changing visible elements)

// Usage: insert view.fadeTransition right before changing content
extension UIView {
    func fadeTransition(duration:CFTimeInterval) {
        let animation:CATransition = CATransition()
        animation.timingFunction = CAMediaTimingFunction(name:
            kCAMediaTimingFunctionEaseInEaseOut)

boherna

Open Terminal and enter:

gem uninstall cocoapods  (Select 'All versions' option.)
sudo rvm implode  (Confirm with 'yes' when prompted.)
sudo brew doctor
sudo brew update
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
\curl -L https://get.rvm.io | bash -s stable --ruby
rm -rf /usr/local/Cellar /usr/local/.git && brew cleanup (Maybe not needed)
sudo gem update --system

boherna

public extension UIButton {

	func copy<T: UIButton>(withControlEvents controlEvents: [UIControlEvents]) -> T? {
		let data = NSKeyedArchiver.archivedData(withRootObject: self)
		guard let copy = NSKeyedUnarchiver.unarchiveObject(with: data) as? T else { return nil }
		if let font = titleLabel?.font {
			copy.titleLabel?.font = font
		}
		if let lineBreakMode = titleLabel?.lineBreakMode {
			copy.titleLabel?.lineBreakMode = lineBreakMode