Note: This framework no longer maintained (not available in Swift 3). Use Once instead. 🙇

FirstAppearing

Helper Protocol-Extension for UIViewController's viewWillAppear/viewDidAppear.

🎉Features

• Just once do process in viewWillAppear/viewDidAppear
• Safety called. (If you use viewWillAppearOnce in viewDidLoad, this process will not be working.)

✏️How to use

• Adapt FirstAppearing protocol.
• Use viewWillAppearOnce in viewWillAppear or
  Use viewDidAppearOnce in viewDidAppear.

class SomeViewController: UIViewControlelr, FirstAppearing {
    override func viewDidLoad() {
        super.viewDidLoad()
        viewWillAppearOnce() {
            print("Wahahaha!") // not working!!
        }
    }

    override func viewWillAppear(animated: Bool) {
        self.clearsSelectionOnViewWillAppear = self.splitViewController!.collapsed
        super.viewWillAppear(animated)
        viewWillAppearOnce() {
            // do something
            print("Once call,",__FUNTION__)
        }
    }

    override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(animated)
        viewDidAppearOnce() {
            // do something
            print("Once call,",__FUNTION__)
        }
    }
}

Requirements

• iOS 8.0+
• Xcode 7.0+(Swift 2+)

Installation and Setup

With Carthage

• Just add the following line to your Cartfile:

github "sgr-ksmt/FirstAppearing"

• Run carthage update on Terminal.
• Add the framework as described. Details: Carthage README

With CocoaPods

Just add the following line to your Podfile:

pod 'FirstAppearing'

• Run pod install on Terminal.