Your First iOS and SwiftUI App · View Modifiers |

This is a companion discussion topic for the original entry at

SwiftUI inspector is updated. You can scroll to the bottom and select “Add Modifier”. From there you can select Shadow and change values.

I don’t understand the modifier struct.

The function Body, you coded it

return content
.font etc…

But I don’t understand the “return content”, wouldn’t Swift hit the return keyword and return from the function?

It’s like the function is written upside down (if you see what I mean).


Ray, I have a question.
In the app you defined a custom view modifier struct called LabelStyle.
struct LabelStyle: ViewModifier {
func body(content: Content) → some View {
return content.foregroundColor(Color.white)
.shadow(color:, radius: 5, x: 2, y: 2)
.font(Font.custom(“Arial Rounded MT Bold”, size: 18))

After that you used this LabelStyle to style/modify the text like below. You created an instance of LabelStyle() and pass it s an argument to modifier function
HStack {
Text(“Put the bullseye as close as you can to:”).modifier(LabelStyle())
Generally I get all of these but there are a few things I want to understand.

1- In the LabelStyle struct we wrote body function and this function is doing all the styling work and returns the styled view. However when we use LableStyle we only created a instance of it and passed it to modifier function(.modifier(LabelStyle())). We never called body method for the instance we created. How/when/where this body method is called? Could you please explain this with an example?

2- Could we call this body method manually and style a text instead of using modifier method? Is so please could you example?


Adding shadows can be done like @sodoherty explained above and you can still find it in the documentation by going to SwiftUI > Views and controls > Text > View modifiers. Do a find for shadows, it will be right under the section for Applying Graphical Effects to a View.

Something weird at this stage of my swiftui bullseye setup. at this point my alert popup is now showing up with yellow background. It was previously just a white background. From reading around, i thought the alert was not customisable in terms of background colors, so i’m thinking i’ve messed up a System setting somewhere??

Anyone come across this before?


After some google-searches on the site for these simulator symptoms, it seems to be related Xcode 12.3, hence nothing related to a swiftui coding mishap or setup. Just assuming, apple will restore the default backgrounds in the next Xcode release.