20.9 Custom Modifiers

SwiftUI also allows you to create your own custom modifiers. This can be particularly useful if you have a standard set of modifiers that are frequently applied to views. Suppose that the following modifiers are a common requirement within your view declarations:

Text("Text 1")

    .font(.largeTitle)

    .background(Color.white)

    .border(Color.gray, width: 0.2)

    .shadow(color: Color.black, radius: 5, x: 0, y: 5)

Instead of applying these four modifiers each time text with this appearance is required, a better solution is to group them into a custom modifier and then reference that modifier each time the modification is needed. Custom modifiers are declared as structs that conform to the ViewModifier protocol and, in this instance, might be implemented as follows:

struct StandardTitle: ViewModifier {

   func body(content: Content...