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convenience initの簡単なメモ

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convenienceイニシャライザは簡単にいうと、イニシャライザの中でinitができるようになるもの!

簡単な例:

class Caffe {
    let place: String
    let name: String
     
    // 指定イニシャライザ(A)
    init(place:String, name:String) {
        self.place = place
        self.name = name
    }
     
    // コンビニエンスイニシャライザ(B)
    convenience init(place:String = "目白") {
        self.init(msg:msg, name:"スターバックス")
    }
     
    func where() {
        print("\(name)\(place)にあります")
    }
}

// イニシャライザBが実行される
let Caffe = Caffe()
let CaffePlace = Caffe(place: "渋谷")
Caffe.where() // スターバックスは目白にあります。
CaffePlace.where() // スターバックスは渋谷にあります。
 
// イニシャライザAが実行される
let CaffeNameAndPlace = Caffe(place: "沖縄", name: "タリーズ")
CaffeNameAndPlace.where() // タリーズは沖縄にあります。

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