プロトコルでStoryboardともっと仲良くなる

Transcript

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    QSFQBSF'PS4FHVF - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { if ([segue.identifier isEqualToString:@"second"]) { SecondViewController *vc = segue.destinationViewController; vc.message = self.message; } } 0CKFDUJWF$ override func prepare(for segue: UIStoryboardSegue, sender: Any?) { if segue.identifier == "second" { let second = segue.destination as! SecondViewController second.message = message } } 4XJGU
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    QSFQBSF'PS4FHVF - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { if ([segue.identifier isEqualToString:@"second"]) { SecondViewController *vc = segue.destinationViewController; vc.message = self.message; } } 0CKFDUJWF$ override func prepare(for segue: UIStoryboardSegue, sender: Any?) { if segue.identifier == "second" { let second = segue.destination as! SecondViewController second.message = message } } 4XJGU ͜͜ͷUZQP͕ʜ
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    QSFQBSF'PS4FHVF - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { if ([segue.identifier isEqualToString:@"second"]) { SecondViewController *vc = segue.destinationViewController; vc.message = self.message; } } 0CKFDUJWF$ override func prepare(for segue: UIStoryboardSegue, sender: Any?) { if segue.identifier == "second" { let second = segue.destination as! SecondViewController second.message = message } } 4XJGU 'PSDF
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    EFTUJOBUJPO override func prepare(for segue: UIStoryboardSegue, sender: Any?) { if let second = segue.destination as? SecondViewController { second.message = message } } override func prepare(for segue: UIStoryboardSegue, sender: Any?) { switch segue.destination { case let second as SecondViewController: second.message = message default: break } } *GMFU TXJUDIMFU
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    EFTUJOBUJPO override func prepare(for segue: UIStoryboardSegue, sender: Any?) { if let second = segue.destination as? SecondViewController { second.message = message } } override func prepare(for segue: UIStoryboardSegue, sender: Any?) { switch segue.destination { case let second as SecondViewController: second.message = message default: break } } *GMFU TXJUDIMFU UZQF
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    EFTUJOBUJPO override func prepare(for segue: UIStoryboardSegue, sender: Any?) { if let second = segue.destination as? SecondViewController { second.message = message } } override func prepare(for segue: UIStoryboardSegue, sender: Any?) { switch segue.destination { case let second as SecondViewController: second.message = message default: break } } *GMFU TXJUDIMFU *EFOUJpFSͷUZQP໰୊΋ղܾ
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    %FTUJOBUJPO class SecondViewController: UIViewController { var message: Message = Message(value: "") } class ThirdViewController: UIViewController { var message: Message = Message(value: "") }
27. .VMUJQMF
    %FTUJOBUJPO override func prepare(for segue: UIStoryboardSegue, sender: Any?) { if let second = segue.destination as? SecondViewController { second.message = message } if let third = segue.destination as? ThirdViewController { third.message = message } }
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    %FTUJOBUJPO override func prepare(for segue: UIStoryboardSegue, sender: Any?) { if let second = segue.destination as? SecondViewController { second.message = message } if let third = segue.destination as? ThirdViewController { third.message = message } } ಉ͡ϓϩύςΟΛ࣋ͭผͷ 7JFX$POUSPMMFS͕૿͑Δ౓ʹܕ νΣοΫͷίʔυ͕૿͑Δʜ
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    1SPUPDPM protocol MessageView: class { var message: Message { get set } } class SecondViewController: UIViewController, MessageView { var message: Message = Message(value: "") } class ThirdViewController: UIViewController, MessageView { var message: Message = Message(value: "") }
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    UBC#BS extension UIStoryboardSegue { var embeddedDestination: UIViewController { return detectDestination(destination) } } private extension UIStoryboardSegue { func detectDestination(_ vc: UIViewController) -> UIViewController { switch vc { case let nav as UINavigationController: guard let top = nav.topViewController else { return nav } return detectDestination(top) case let tab as UITabBarController: guard let sel = tab.selectedViewController else { return tab } return detectDestination(sel) default: return vc } } }
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