SwiftUI forEach

SwiftUI is a modern, declarative user interface framework for building iOS, iPadOS, macOS, watchOS, and tvOS apps. ForEach is a view that allows you to create a dynamic list of views from an array, a set, or a range.

Syntax

ForEach<Data, ID, Content>(
    _ data: Data, 
    id: KeyPath<Data.Element, ID>, 
    content: (Data.Element) -> Content
) -> some View where Data : RandomAccessCollection, ID : Hashable, Content : View

• data: The collection of data that is used to create the views.
• id: A key path to a property on the data that uniquely identifies each element. The identified elements must be hashable.
• content: A closure that returns the content of the view for each element in the data collection.

Example

struct ContentView: View {
    let languages = ["Swift", "Objective-C", "Java", "Python", "Ruby", "Kotlin"]
    
    var body: some View {
        List {
            ForEach(languages, id: \.self) { language in
                Text(language)
            }
        }
    }
}

In the above example, we have an array of programming languages. We create a dynamic list of Text views by iterating over the languages array using ForEach. The id: \.self parameter specifies that the languages array is identified by its own values, and the closure provides the content for each row in the list.

Conclusion

ForEach is a powerful tool in SwiftUI for creating dynamic lists of views. It is useful for iterating over collections of data and generating views based on each element in the collection. By using ForEach, we can keep our code clean and maintainable.