Struct UIWindowSceneActivationAction 

pub struct UIWindowSceneActivationAction { /* private fields */ }

Available on crate features UIAction and UIMenuElement and UIWindowSceneActivationAction only.

An action that facilitates activating a UIWindowScenewhen performed.

See also Apple’s documentation

Implementations

impl UIWindowSceneActivationAction

pub fn title(&self) -> Retained<NSString>

The actions title. Set to nil to use the default title.

pub fn setTitle(&self, title: Option<&NSString>)

Setter for title.

This is copied when set.

pub unsafe fn actionWithIdentifier_alternateAction_configurationProvider( identifier: Option<&UIActionIdentifier>, alternate_action: Option<&UIAction>, configuration_provider: UIWindowSceneActivationActionConfigurationProvider, mtm: MainThreadMarker, ) -> Retained<Self>

Available on crate features UIWindowSceneActivationConfiguration and block2 only.

Returns a new UIWindowSceneActivationAction

Parameter identifier: The action’s identifier. Pass nil to use an auto-generated identifier.

Parameter alternateAction: If running on a platform that doesn’t support multiple windows, the alternate action is used. Otherwise, the alternates handler is called if the scene activation request fails.

Parameter configurationProvider: Called when the action has been triggered. It should return a UIWindowSceneActivationConfigurationwhose user activity will be used to request scene activation.

Safety

configuration_provider must be a valid pointer.

pub unsafe fn actionWithHandler( handler: UIActionHandler, mtm: MainThreadMarker, ) -> Retained<Self>

Available on crate feature block2 only.

Safety

handler must be a valid pointer.

pub unsafe fn actionWithTitle_image_identifier_handler( title: &NSString, image: Option<&UIImage>, identifier: Option<&UIActionIdentifier>, handler: UIActionHandler, mtm: MainThreadMarker, ) -> Retained<Self>

Available on crate features UIImage and block2 only.

Safety

handler must be a valid pointer.

impl UIWindowSceneActivationAction

Methods declared on superclass UIAction.

pub unsafe fn init(this: Allocated<Self>) -> Retained<Self>

pub unsafe fn new(mtm: MainThreadMarker) -> Retained<Self>

impl UIWindowSceneActivationAction

Methods declared on superclass UIMenuElement.

pub unsafe fn initWithCoder( this: Allocated<Self>, coder: &NSCoder, ) -> Option<Retained<Self>>

Safety

coder possibly has further requirements.

Methods from Deref<Target = UIAction>

pub fn title(&self) -> Retained<NSString>

Short display title.

pub fn setTitle(&self, title: &NSString)

Setter for title.

This is copied when set.

pub fn image(&self) -> Option<Retained<UIImage>>

Available on crate feature UIImage only.

Image that can appear next to this action.

pub fn setImage(&self, image: Option<&UIImage>)

Available on crate feature UIImage only.

Setter for image.

This is copied when set.

pub fn discoverabilityTitle(&self) -> Option<Retained<NSString>>

Elaborated title used in keyboard shortcut overlay.

pub fn setDiscoverabilityTitle(&self, discoverability_title: Option<&NSString>)

Setter for discoverabilityTitle.

This is copied when set.

pub fn identifier(&self) -> Retained<UIActionIdentifier>

This action’s identifier.

pub fn attributes(&self) -> UIMenuElementAttributes

This action’s style.

pub fn setAttributes(&self, attributes: UIMenuElementAttributes)

Setter for attributes.

pub fn state(&self) -> UIMenuElementState

State that can appear next to this action.

pub fn setState(&self, state: UIMenuElementState)

Setter for state.

pub fn sender(&self) -> Option<Retained<AnyObject>>

If available, the object on behalf of which the actionHandler is called.

Methods from Deref<Target = UIMenuElement>

pub fn title(&self) -> Retained<NSString>

The element’s title.

pub fn subtitle(&self) -> Option<Retained<NSString>>

The element’s subtitle.

pub fn setSubtitle(&self, subtitle: Option<&NSString>)

Setter for subtitle.

This is copied when set.

pub fn image(&self) -> Option<Retained<UIImage>>

Available on crate feature UIImage only.

Image to be displayed alongside the element’s title.

Methods from Deref<Target = NSObject>

pub fn doesNotRecognizeSelector(&self, sel: Sel) -> !

Handle messages the object doesn’t recognize.

See Apple’s documentation for details.

Methods from Deref<Target = AnyObject>

pub fn class(&self) -> &'static AnyClass

Available on crate feature UIIndirectScribbleInteraction only.

Dynamically find the class of this object.

Panics

May panic if the object is invalid (which may be the case for objects returned from unavailable init/new methods).

Example

Check that an instance of NSObject has the precise class NSObject.

use objc2::ClassType;
use objc2::runtime::NSObject;

let obj = NSObject::new();
assert_eq!(obj.class(), NSObject::class());

pub unsafe fn get_ivar<T>(&self, name: &str) -> &T

where T: Encode,

👎Deprecated: this is difficult to use correctly, use Ivar::load instead.

Available on crate feature UIIndirectScribbleInteraction only.

Use Ivar::load instead.

Safety

The object must have an instance variable with the given name, and it must be of type T.

See Ivar::load_ptr for details surrounding this.

pub fn downcast_ref<T>(&self) -> Option<&T>

where T: DowncastTarget,

Available on crate feature UIIndirectScribbleInteraction only.

Attempt to downcast the object to a class of type T.

This is the reference-variant. Use Retained::downcast if you want to convert a retained object to another type.

Mutable classes

Some classes have immutable and mutable variants, such as NSString and NSMutableString.

When some Objective-C API signature says it gives you an immutable class, it generally expects you to not mutate that, even though it may technically be mutable “under the hood”.

So using this method to convert a NSString to a NSMutableString, while not unsound, is generally frowned upon unless you created the string yourself, or the API explicitly documents the string to be mutable.

See Apple’s documentation on mutability and on isKindOfClass: for more details.

Generic classes

Objective-C generics are called “lightweight generics”, and that’s because they aren’t exposed in the runtime. This makes it impossible to safely downcast to generic collections, so this is disallowed by this method.

You can, however, safely downcast to generic collections where all the type-parameters are AnyObject.

Panics

This works internally by calling isKindOfClass:. That means that the object must have the instance method of that name, and an exception will be thrown (if CoreFoundation is linked) or the process will abort if that is not the case. In the vast majority of cases, you don’t need to worry about this, since both root objects NSObject and NSProxy implement this method.

Examples

Cast an NSString back and forth from NSObject.

use objc2::rc::Retained;
use objc2_foundation::{NSObject, NSString};

let obj: Retained<NSObject> = NSString::new().into_super();
let string = obj.downcast_ref::<NSString>().unwrap();
// Or with `downcast`, if we do not need the object afterwards
let string = obj.downcast::<NSString>().unwrap();

Try (and fail) to cast an NSObject to an NSString.

use objc2_foundation::{NSObject, NSString};

let obj = NSObject::new();
assert!(obj.downcast_ref::<NSString>().is_none());

Try to cast to an array of strings.

use objc2_foundation::{NSArray, NSObject, NSString};

let arr = NSArray::from_retained_slice(&[NSObject::new()]);
// This is invalid and doesn't type check.
let arr = arr.downcast_ref::<NSArray<NSString>>();

This fails to compile, since it would require enumerating over the array to ensure that each element is of the desired type, which is a performance pitfall.

Downcast when processing each element instead.

use objc2_foundation::{NSArray, NSObject, NSString};

let arr = NSArray::from_retained_slice(&[NSObject::new()]);

for elem in arr {
    if let Some(data) = elem.downcast_ref::<NSString>() {
        // handle `data`
    }
}

Trait Implementations

impl AsRef<AnyObject> for UIWindowSceneActivationAction

fn as_ref(&self) -> &AnyObject

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<NSObject> for UIWindowSceneActivationAction

fn as_ref(&self) -> &NSObject

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<UIAction> for UIWindowSceneActivationAction

fn as_ref(&self) -> &UIAction

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<UIMenuElement> for UIWindowSceneActivationAction

fn as_ref(&self) -> &UIMenuElement

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<UIWindowSceneActivationAction> for UIWindowSceneActivationAction

fn as_ref(&self) -> &Self

Converts this type into a shared reference of the (usually inferred) input type.

impl Borrow<AnyObject> for UIWindowSceneActivationAction

fn borrow(&self) -> &AnyObject

Immutably borrows from an owned value.

impl Borrow<NSObject> for UIWindowSceneActivationAction

fn borrow(&self) -> &NSObject

Immutably borrows from an owned value.

impl Borrow<UIAction> for UIWindowSceneActivationAction

fn borrow(&self) -> &UIAction

Immutably borrows from an owned value.

impl Borrow<UIMenuElement> for UIWindowSceneActivationAction

fn borrow(&self) -> &UIMenuElement

Immutably borrows from an owned value.

impl ClassType for UIWindowSceneActivationAction

const NAME: &'static str = "UIWindowSceneActivationAction"

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

type Super = UIAction

The superclass of this class.

type ThreadKind = <<UIWindowSceneActivationAction as ClassType>::Super as ClassType>::ThreadKind

Whether the type can be used from any thread, or from only the main thread.

fn class() -> &'static AnyClass

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

fn as_super(&self) -> &Self::Super

Get an immutable reference to the superclass.

impl CopyingHelper for UIWindowSceneActivationAction

type Result = UIWindowSceneActivationAction

The immutable counterpart of the type, or Self if the type has no immutable counterpart.

impl Debug for UIWindowSceneActivationAction

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

Formats the value using the given formatter.

impl Deref for UIWindowSceneActivationAction

type Target = UIAction

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl Hash for UIWindowSceneActivationAction

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Message for UIWindowSceneActivationAction

fn retain(&self) -> Retained<Self>

where Self: Sized,

Increment the reference count of the receiver.

impl NSCoding for UIWindowSceneActivationAction

unsafe fn encodeWithCoder(&self, coder: &NSCoder)

where Self: Sized + Message,

Safety

unsafe fn initWithCoder( this: Allocated<Self>, coder: &NSCoder, ) -> Option<Retained<Self>>

where Self: Sized + Message,

Safety

impl NSCopying for UIWindowSceneActivationAction

fn copy(&self) -> Retained<Self::Result>

where Self: Sized + Message + CopyingHelper,

Returns a new instance that’s a copy of the receiver.

unsafe fn copyWithZone(&self, zone: *mut NSZone) -> Retained<Self::Result>

where Self: Sized + Message + CopyingHelper,

Returns a new instance that’s a copy of the receiver.

impl NSObjectProtocol for UIWindowSceneActivationAction

fn isEqual(&self, other: Option<&AnyObject>) -> bool

where Self: Sized + Message,

Check whether the object is equal to an arbitrary other object.

fn hash(&self) -> usize

where Self: Sized + Message,

An integer that can be used as a table address in a hash table structure.

fn isKindOfClass(&self, cls: &AnyClass) -> bool

where Self: Sized + Message,

Check if the object is an instance of the class, or one of its subclasses.

fn is_kind_of<T>(&self) -> bool

where T: ClassType, Self: Sized + Message,

👎Deprecated: use isKindOfClass directly, or cast your objects with AnyObject::downcast_ref

Check if the object is an instance of the class type, or one of its subclasses.

fn isMemberOfClass(&self, cls: &AnyClass) -> bool

where Self: Sized + Message,

Check if the object is an instance of a specific class, without checking subclasses.

fn respondsToSelector(&self, aSelector: Sel) -> bool

where Self: Sized + Message,

Check whether the object implements or inherits a method with the given selector.

fn conformsToProtocol(&self, aProtocol: &AnyProtocol) -> bool

where Self: Sized + Message,

Check whether the object conforms to a given protocol.

fn description(&self) -> Retained<NSObject>

where Self: Sized + Message,

A textual representation of the object.

fn debugDescription(&self) -> Retained<NSObject>

where Self: Sized + Message,

A textual representation of the object to use when debugging.

fn isProxy(&self) -> bool

where Self: Sized + Message,

Check whether the receiver is a subclass of the NSProxy root class instead of the usual NSObject.

fn retainCount(&self) -> usize

where Self: Sized + Message,

The reference count of the object.

impl NSSecureCoding for UIWindowSceneActivationAction

fn supportsSecureCoding() -> bool

where Self: Sized + ClassType,

impl PartialEq for UIWindowSceneActivationAction

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl RefEncode for UIWindowSceneActivationAction

const ENCODING_REF: Encoding = <UIAction as ::objc2::RefEncode>::ENCODING_REF

The Objective-C type-encoding for a reference of this type.

impl UIMenuLeaf for UIWindowSceneActivationAction

fn title(&self) -> Retained<NSString>

where Self: Sized + Message,

Available on crate feature UIMenuLeaf only.

Short display title.

fn setTitle(&self, title: &NSString)

where Self: Sized + Message,

Available on crate feature UIMenuLeaf only.

Setter for title.

fn image(&self) -> Option<Retained<UIImage>>

where Self: Sized + Message,

Available on crate features UIMenuLeaf and UIImage only.

Image that can appear next to this element.

fn setImage(&self, image: Option<&UIImage>)

where Self: Sized + Message,

Available on crate features UIMenuLeaf and UIImage only.

Setter for image.

fn selectedImage(&self) -> Option<Retained<UIImage>>

where Self: Sized + Message,

Available on crate features UIMenuLeaf and UIImage only.

Image that can appear next to this action when the state is UIMenuElementStateOn

fn setSelectedImage(&self, selected_image: Option<&UIImage>)

where Self: Sized + Message,

Available on crate features UIMenuLeaf and UIImage only.

Setter for selectedImage.

fn discoverabilityTitle(&self) -> Option<Retained<NSString>>

where Self: Sized + Message,

Available on crate feature UIMenuLeaf only.

Elaborated title used in keyboard shortcut overlay.

fn setDiscoverabilityTitle(&self, discoverability_title: Option<&NSString>)

where Self: Sized + Message,

Available on crate feature UIMenuLeaf only.

Setter for discoverabilityTitle.

fn attributes(&self) -> UIMenuElementAttributes

where Self: Sized + Message,

Available on crate features UIMenuLeaf and UIMenuElement only.

The element’s attributes.

fn setAttributes(&self, attributes: UIMenuElementAttributes)

where Self: Sized + Message,

Available on crate features UIMenuLeaf and UIMenuElement only.

Setter for attributes.

fn state(&self) -> UIMenuElementState

where Self: Sized + Message,

Available on crate features UIMenuLeaf and UIMenuElement only.

The element’s selection state.

fn setState(&self, state: UIMenuElementState)

where Self: Sized + Message,

Available on crate features UIMenuLeaf and UIMenuElement only.

Setter for state.

fn repeatBehavior(&self) -> UIMenuElementRepeatBehavior

where Self: Sized + Message,

Available on crate features UIMenuLeaf and UIMenuElement only.

The leaf’s preferred repeat behavior. Menu leaves can repeatedly perform their primary actions on prolonged interactions, such as by holding down their keyboard shortcut.

fn setRepeatBehavior(&self, repeat_behavior: UIMenuElementRepeatBehavior)

where Self: Sized + Message,

Available on crate features UIMenuLeaf and UIMenuElement only.

Setter for repeatBehavior.

fn sender(&self) -> Option<Retained<AnyObject>>

where Self: Sized + Message,

Available on crate feature UIMenuLeaf only.

The object on behalf of which the element’s primary action is being performed. This property is only populated during the execution of the element’s primary action (i.e. its handler or selector) if available.

fn presentationSourceItem( &self, ) -> Option<Retained<ProtocolObject<dyn UIPopoverPresentationControllerSourceItem>>>

where Self: Sized + Message,

Available on crate features UIMenuLeaf and UIPopoverPresentationControllerSourceItem only.

Source item for subsequent presentations. For example, an element displayed in a menu attached to a UIButtonmay return the button so that a popover may be presented from it when the element is tapped. If available, this property is only populated during the execution of the element’s action (i.e. its handler or selector).

unsafe fn performWithSender_target( &self, sender: Option<&AnyObject>, target: Option<&AnyObject>, )

where Self: Sized + Message,

Available on crate feature UIMenuLeaf only.

Performs the element’s primary action (i.e. it’s handler or selector).

impl DowncastTarget for UIWindowSceneActivationAction

impl Eq for UIWindowSceneActivationAction