vvit

DispatchQueue.global(qos: .userInitiated).async { [unowned self] in
    ...
    DispatchQueue.main.async { [unowned self] in
       ... 
    }
}

// Delay execution of the block
DispatchQueue.main.asyncAfter(deadline: .now() + 0.2) {
    ...

vvit

view.layoutIfNeeded()     // Optional. Ensure that all pending layout operations have been completed
UIView.animateWithDuration(5) {
  someConstraint.constant = 0
  self.view.layoutIfNeeded()   // called on parent view
}

vvit

//If git keeps asking the passkey: add it to the keychain
ssh-add -K ~/.ssh/id_rsa


//create and switch to a new branch
git checkout -b <branch>

//push new branch to a repo
git push -u origin <branch>

vvit

post_install do |installer_representation|
  installer_representation.project.targets.each do |target|
    if target.name == 'Pods-Mixpanel'
      target.build_configurations.each do |config|
        if config.name == 'Debug'
          puts "  Pods-Mixpanel #{config.name} before: #{config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'].inspect}"
          config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= ['$(inherited)']
          config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] << 'DISABLE_MIXPANEL_AB_DESIGNER=1'
          puts "  Pods-Mixpanel #{config.name} after:  #{config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'].inspect}"
        end

vvit

1. Delete your app from the device.
2. Turn the device off completely and turn it back on.
3. Go to Settings > General > Date & Time and set the date ahead a day or more.
4. Turn the device off completely again and turn it back on.

https://developer.apple.com/library/ios/technotes/tn2265/_index.html#//apple_ref/doc/uid/DTS40010376-CH1-TNTAG42

vvit

//listing
gsutil ls gs://arq-285486884533/
//size
gsutil du -sh gs://arq-285486884533/

vvit

// Version check:
sudo gem list cocoapods

// Downgrade
sudo gem uninstall cocoapods

// Install required version
sudo gem install cocoapods -v 0.25.0

vvit

// Singleton
final class Singleton {
    static let shared = Singleton()
    private init() { // forbid object creation
    }
}


// Lazy
lazy var players = {

vvit

mkdir -p ~/Library/Developer/Xcode/UserData/FontAndColorThemes;
cd ~/Library/Developer/Xcode/UserData/FontAndColorThemes;
curl -O https://dl.dropboxusercontent.com/u/1983175/EGOv2.dvtcolortheme

Now just restart Xcode, go to Preferences > Fonts & Colors, and select "EGO" or "EGOv2" from the color theme drop down.
http://developers.enormego.com/view/ego_xcode_theme_for_xcode_4_egov2

vvit

// Check if a view controller is popped from navigation stack (either by `popViewController` or interactive transition)
// Method 1
override func didMove(toParentViewController parent: UIViewController?) {
    super.didMove(toParentViewController: parent)
    if parent == nil { // parent is `nil` when the vc is popped
    }
}

// Method 2
override func viewDidDisappear(animated: Bool) {