segue_handler_plugin

WillowTreeSegueHandler

Better segue handling in Swift

Installation

Gemfile

gem "segue_handler_plugin"

Podfile

plugin 'segue_handler_plugin'
pod 'WillowTreeSegueHandler'

Build Phases Add a run script phase before the "Compile Sources" phase, with the following:

bundle exec pod --no-ansi --silent generate-segue-handlers $PROJECT_DIR $PROJECT_NAME

Build it once, then add the SegueExtensions.swift file to your project and build again.

Usage

Segues with identifiers will be pulled out into nested enums in extensions on your view controllers, written to SegueExtensions.swift.

Example generated code, assuming A and B are view controllers connected with from A to B via the segue with identifier "ToB".

extension A: SegueHandler {
    enum SegueIdentifier: String {
        case ToB
    }

    enum ToSegueDestination: SegueDestination {
        case ToB(B)

        init?(identifier: SegueIdentifier, destination: UIViewController) {
            switch identifier {
            case .ToB:
                guard let vc = destination as? B else { return nil }
                self = ToB(vc)
            }
        }
    }
}

These can be used in your view controller like so:

func pushManually() {
    performSegue(.ToB, sender: self)
}

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    switch segueFromStoryboardSegue(segue) {
    case .ToB(let b):
        b.prepare(dependency: "injected from a")
    }
}

See the enclosed Example application for a working demo.

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