Custom environment values are useful when you have data that multiple views need access to, but you don't want to pass them down manually through each view's initializer.
Launch screen is the initial screen that appears when your app is launched. It provides a seamless transition from launching the app to displaying its first screen.
For most cases, using the scrollDismissesKeyboard modifier is the simpler and more recommended approach, especially with SwiftUI 16 and later.
Use StateObject when the view is the source of truth for the object, ObservedObject when the object’s lifecycle is managed outside the view, such as when it’s passed into the view.
There are several ways to dismiss views in SwiftUI like using a @Binding variable, dismiss environment value or deprecated presentationMode.
Lightweight migrations are automatic and can handle small changes, complex migrations require manual intervention and can handle more advanced changes.
You can also create your own custom view modifiers by adopting the ViewModifier protocol and implementing the body(content:) method.
Binding creates a two-way connection, while Bindable create bindings to the mutable properties of an observable object.
By understanding the different content modes and how to use custom aspect ratios, you can ensure your images look great on all devices and screen orientations.
In SwiftUI, choose one source of truth, then pass data down with properties or environment, pass editable values with bindings, and pass child-derived values up with preferences.