Struct AlertSpec 

pub struct AlertSpec {
    pub title: String,
    pub message: String,
    pub actions: Vec<AlertAction>,
    pub cancelable: bool,
    pub style: AlertStyle,
    pub anchor: Option<AnchorRect>,
}

What an alert asks: a title, a message, up to MAX_ALERT_ACTIONS actions, and how it is presented.

Validated when submitted (show_alert), before any platform API is touched: at least one action and at most MAX_ALERT_ACTIONS actions, every action id non-empty and unique (the id is what AlertOutcome::Action reports back), at most one ActionRole::Cancel action (UIKit raises on a second one), and an AnchorRect — when given — finite with a non-negative size. An AlertStyle::ActionSheet on iPad additionally requires anchor; that rule is the iOS arm’s, checked when it presents (only it can tell an iPad from an iPhone).

Fields

title: String

The alert’s title.

message: String

The alert’s body text.

actions: Vec<AlertAction>

The buttons, in presentation order.

cancelable: bool

Whether the user may dismiss the alert without choosing an action (back key / outside tap where the platform has one) — answered as AlertOutcome::Cancelled.

style: AlertStyle

Centered alert or action sheet.

anchor: Option<AnchorRect>

Where an action sheet points from, in logical points of the presenting window’s coordinate space (origin top-left).

Implementations

impl AlertSpec

pub fn new(title: impl Into<String>, message: impl Into<String>) -> Self

A cancelable AlertStyle::Alert with no actions and no anchor — add buttons with Self::with_action.

pub fn with_action( self, id: impl Into<String>, label: impl Into<String>, role: ActionRole, ) -> Self

Append one action.

pub fn validate(&self) -> Result<(), PresentError>

The submit-time validation described on AlertSpec.

Errors

PresentError::InvalidSpec naming the first rule broken.

Trait Implementations

impl Clone for AlertSpec

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for AlertSpec

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for AlertSpec

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for AlertSpec