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【SwiftUI】Buttonの活性/非活性状態を切り替える

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コード

  • 必要最低限のこれだけで動くミニマムサンプル
@State private var isDisabled: Bool = false

Button {
// 省略
}
.backgroundColor(isDisabled ? .gray: .red)
.isDisabled(isDisabled)

解説

  • @State変数のisDisabledを定義する
  • 修飾子isDisabledで活性/非活性を切り替えることが出来る
  • 修飾子backgroundの中で二項演算子を用いることで背景色を変更できる
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