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Let's say that I am making a custom input element that looks like this:
struct CustomInput : View { @Binding var text: String var name: String var body: some View { TextField(name, text: $text) .modifier(InputModifier()) } } Currently, when I instantiate this view I'm required to pass both text and name names to arguments. I want to be able to make the name argument optional, like in the example below.
CustomInput("Some name", $text) Typically I'd use an init method for this. But I'm not sure how to handle property wrappers like @Binding in the init function.
Any ideas on how I can achieve this?
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Creates a text view that displays a stored string without localization.
In SwiftUI, you can create bindings in 2 ways: With the @Binding property wrapper, which creates a binding, but doesn't store it. With other property wrappers, like @State, which creates a binding, and also stores its value.
An initializer is a special type of function that is used to create an object of a class or struct. In Swift, we use the init() method to create an initializer. For example, class Wall { ... // create an initializer init() { // perform initialization ... } }
Swift defines two kinds of initializers for class types to help ensure all stored properties receive an initial value. These are known as designated initializers and convenience initializers.
You can write your initializer like this:
struct CustomInput : View { @Binding var text: String var name: String init(_ name: String, _ text: Binding<String>) { self.name = name // Beta 3 // self.$text = text // Beta 4 self._text = text } var body: some View { TextField(name, text: $text) } } If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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