How do I write custom SwiftUI ViewModifiers?

In SwiftUI, custom ViewModifiers allow you to encapsulate reusable styling and behavior for your views. By creating a custom modifier, you can apply specific visual changes or add new functionalities to multiple views without repeating code.

Creating a Custom ViewModifier

To create a custom ViewModifier, you need to define a struct that conforms to the ViewModifier protocol. You must implement the required body(content:) method, where you can define how the view should look or behave.

Example

struct CustomModifier: ViewModifier { func body(content: Content) -> some View { content .padding() .background(Color.blue) .cornerRadius(10) .shadow(radius: 5) } } extension View { func applyCustomStyle() -> some View { self.modifier(CustomModifier()) } }

To use your custom modifier, simply call the applyCustomStyle() method on any SwiftUI view.

Usage Example

struct ContentView: View { var body: some View { Text("Hello, SwiftUI!") .applyCustomStyle() } }

SwiftUI ViewModifier custom modifiers SwiftUI styling reusable views SwiftUI example

Related Questions

How do I avoid rehashing overhead with std::set in multithreaded code?

How do I find elements with custom comparators with std::set for embedded targets?

How do I erase elements while iterating with std::set for embedded targets?

How do I provide stable iteration order with std::unordered_map for large datasets?

How do I reserve capacity ahead of time with std::unordered_map for large datasets?

How do I erase elements while iterating with std::unordered_map in multithreaded code?

How do I provide stable iteration order with std::map for embedded targets?

How do I provide stable iteration order with std::map in multithreaded code?

How do I avoid rehashing overhead with std::map in performance-sensitive code?

How do I merge two containers efficiently with std::map for embedded targets?