Struct Props 

pub struct Props { /* private fields */ }

The properties of a composed view, read inside its body.

Indices are the order the properties were added. Reading the wrong type at an index is a programming error the same way an out-of-range index is, and is caught the same way — by an assertion, not by a fault inside SwiftUI.

Implementations

impl Props

pub fn state<T: StateValue + Default>(&self, prop: StateProp<T>) -> T

The @State at index i.

Returns T’s default before SwiftUI has installed the property — the box is the last word of a State<V>, and a zero one means reading would fault rather than answer.

pub fn stored<T: StoredValue>(&self, prop: StoredProp<T>) -> T

The @AppStorage at index i.

pub fn focus(&self, prop: FocusProp) -> bool

Whether the @FocusState at index i currently has focus.

pub fn focus_projection(&self, prop: FocusProp) -> [u64; 3]

The three words .focused(_:) wants, for the @FocusState at index i. Pass it to crate::views::focused_on on the field it belongs to.

pub fn env<K: EnvKey>(&self, prop: EnvProp<K>) -> K::Value

The @Environment value at index i.