Trait NSAlertDelegate 

pub unsafe trait NSAlertDelegate: NSObjectProtocol + MainThreadOnly {
    // Provided method
    fn alertShowHelp(&self, alert: &NSAlert) -> bool
       where Self: Sized + Message { ... }
}

Available on crate feature NSAlert only.

A set of optional methods implemented by the delegate of an NSAlert object to respond to a user’s request for help.

See also Apple’s documentation

Provided Methods

fn alertShowHelp(&self, alert: &NSAlert) -> bool

where Self: Sized + Message,

Sent to the delegate when the user clicks the alert’s help button. The delegate causes help to be displayed for an alert, directly or indirectly.

• Returns: YES when the delegate displayed help directly, NO otherwise. When NO and the alert has a help anchor (helpAnchor), the application’s help manager displays help using the help anchor.
• Discussion: The delegate implements this method only to override the help-anchor lookup behavior.

Trait Implementations

impl ProtocolType for dyn NSAlertDelegate

const NAME: &'static str = "NSAlertDelegate"

The name of the Objective-C protocol that this type represents.

fn protocol() -> Option<&'static AnyProtocol>

Get a reference to the Objective-C protocol object that this type represents.

impl<T> ImplementedBy<T> for dyn NSAlertDelegate

where T: ?Sized + Message + NSAlertDelegate,

Implementations on Foreign Types

impl<T> NSAlertDelegate for ProtocolObject<T>

where T: ?Sized + NSAlertDelegate,

Implementors