🔰delete item from list

SwiftUI ⟩ view ⟩ state ⟩ actions ⟩ delete item from list

1. add .onDelete to ForEach.：when elements in the ForEach view are deleted

2. delete item from the underlying collection of data (in the action closure).

// list data from environment object
// (assume `data` is the environment object)
ForEach(data.creatures) { creature in 
    CreatureRow(creature: creature)
}
// ⭐️ when elements in the ForEach view are deleted
.onDelete { indexSet in 

    /// • SwiftUI passes a set of indices to the closure 
    ///   that’s relative to the dynamic view’s underlying collection of data.
    
    // ⭐️ delete corresponding items from the underlying collection of data
    data.creatures.remove(atOffsets: indexSet)
}

👥 相關

• ForEach ⟩ .onDelete

📘 手冊

• SwiftUI ⟩ View groupings ⟩ DynamicViewContent ⟩ .onDelete(perform:)

📗 參考

• Hacking with Swift ⟩ Deleting items using onDelete()