SwiftUI TextField force lowercase

Question

I would like to use a specific TextField for url entries where the user could only enter lowercase characters, but I can't find any TextField modifier for this purpose. Is there any solution?

Answer 1

TextField has a .autocapitalization() method.

You can use like this without custom binding:

TextField("URL", text: $url)                     .keyboardType(.URL)                     .autocapitalization(.none) 

For iOS 15 SwiftUI have a new .textInputAutocapitalization() method:

.textInputAutocapitalization(.never) 

This means that any text input by the user will be .lowercased()

Answer 2

You can create a custom binding and set your state URL variable to the lowercased version of the input through it:

struct ContentView: View {     @State var url: String = ""      var body: some View {         let binding = Binding<String>(get: {             self.url         }, set: {             self.url = $0.lowercased()         })          return VStack {             TextField("Enter URL", text: binding)         }      } }