I'm building a CustomTextField View and wanting to add view modifiers.
Using the standard .modifier(CustomViewModifier) is working just fine. Now I want to build ViewModifier functions so that I can use my modifiers just like any other SwiftUI modifiers.
In my CustomTextField, I've got multiple methods like this:
func setCustomPlaceholder(placeholder: String = "Enter Text") -> some View {
modifier(CustomTextFieldPlaceholderViewModifier(viewModel: viewModel, placeholder: placeholder))
}
These methods work. However, I can only use one of these methods at a time.
I've read several articles and this thread. Because I don't want these modifiers available to any View, I'd like to avoid using an extension to View.
In this thread, one of the answers used an extension to Text. So I tried placing my modifier methods into an extension to my CustomTextField. However, I'm still facing the same issue. The View is only recognizing one modifier function at a time.
This is how I'm using it:
VStack {
CustomTextField()
.setCustomPlaceholder()
.setBorder()
}
If I use only one of the modifier methods at a time, it works.
How can I get the functionality I'm looking for? Do I need to build a Protocol and make my CustomTextField conform to it? Thanks for any help!
CodePudding user response：
If I use only one of the modifier methods at a time, it works
That’s because the only thing known about the result of the first view modifier is that it returns a View (of an unspecified kind).
Since you haven’t defined your view modifier on View… you can’t call it on a View.
CodePudding user response：
We can just make needed modifiers as our view member functions, which return own type to be called sequentially.
Here is a main part. Tested with Xcode 13.4 / iOS 15.5
struct CustomTextField: View {
// ... other code
func setCustomPlaceholder(placeholder: String = "Enter Text") -> Self { // << here Self !!
var tmp = self
tmp.placeholder = placeholder
return tmp
}
// ... other code
}