Struct UIPresentationController 

pub struct UIPresentationController { /* private fields */ }

Available on crate feature UIPresentationController only.

Apple’s documentation

Implementations

impl UIPresentationController

pub fn presentingViewController(&self) -> Retained<UIViewController>

Available on crate features UIResponder and UIViewController only.

pub fn presentedViewController(&self) -> Retained<UIViewController>

Available on crate features UIResponder and UIViewController only.

pub fn presentationStyle(&self) -> UIModalPresentationStyle

Available on crate feature UIViewController only.

pub fn containerView(&self) -> Option<Retained<UIView>>

Available on crate features UIResponder and UIView only.

pub fn delegate( &self, ) -> Option<Retained<ProtocolObject<dyn UIAdaptivePresentationControllerDelegate>>>

pub unsafe fn setDelegate( &self, delegate: Option<&ProtocolObject<dyn UIAdaptivePresentationControllerDelegate>>, )

Setter for delegate.

This is a weak property.

pub fn initWithPresentedViewController_presentingViewController( this: Allocated<Self>, presented_view_controller: &UIViewController, presenting_view_controller: Option<&UIViewController>, ) -> Retained<Self>

Available on crate features UIResponder and UIViewController only.

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

pub fn adaptivePresentationStyle(&self) -> UIModalPresentationStyle

Available on crate feature UIViewController only.

pub fn adaptivePresentationStyleForTraitCollection( &self, trait_collection: &UITraitCollection, ) -> UIModalPresentationStyle

Available on crate features UITraitCollection and UIViewController only.

pub fn containerViewWillLayoutSubviews(&self)

pub fn containerViewDidLayoutSubviews(&self)

pub fn presentedView(&self) -> Option<Retained<UIView>>

Available on crate features UIResponder and UIView only.

pub fn frameOfPresentedViewInContainerView(&self) -> CGRect

Available on crate feature objc2-core-foundation only.

pub fn shouldPresentInFullscreen(&self) -> bool

pub fn shouldRemovePresentersView(&self) -> bool

pub fn presentationTransitionWillBegin(&self)

pub fn presentationTransitionDidEnd(&self, completed: bool)

pub fn dismissalTransitionWillBegin(&self)

pub fn dismissalTransitionDidEnd(&self, completed: bool)

pub fn overrideTraitCollection(&self) -> Option<Retained<UITraitCollection>>

👎Deprecated: Use the traitOverrides property instead

Available on crate feature UITraitCollection only.

pub fn setOverrideTraitCollection( &self, override_trait_collection: Option<&UITraitCollection>, )

👎Deprecated: Use the traitOverrides property instead

Available on crate feature UITraitCollection only.

Setter for overrideTraitCollection.

This is copied when set.

impl UIPresentationController

Methods declared on superclass NSObject.

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

impl UIPresentationController

pub fn traitOverrides(&self) -> Retained<ProtocolObject<dyn UITraitOverrides>>

Available on crate feature UITraitCollection only.

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 UIPresentationController

fn as_ref(&self) -> &AnyObject

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

impl AsRef<NSObject> for UIPresentationController

fn as_ref(&self) -> &NSObject

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

impl AsRef<UIPresentationController> for UIPopoverPresentationController

Available on crate feature UIPopoverPresentationController only.

fn as_ref(&self) -> &UIPresentationController

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

impl AsRef<UIPresentationController> for UIPresentationController

fn as_ref(&self) -> &Self

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

impl AsRef<UIPresentationController> for UISheetPresentationController

Available on crate feature UISheetPresentationController only.

fn as_ref(&self) -> &UIPresentationController

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

impl Borrow<AnyObject> for UIPresentationController

fn borrow(&self) -> &AnyObject

Immutably borrows from an owned value.

impl Borrow<NSObject> for UIPresentationController

fn borrow(&self) -> &NSObject

Immutably borrows from an owned value.

impl Borrow<UIPresentationController> for UIPopoverPresentationController

Available on crate feature UIPopoverPresentationController only.

fn borrow(&self) -> &UIPresentationController

Immutably borrows from an owned value.

impl Borrow<UIPresentationController> for UISheetPresentationController

Available on crate feature UISheetPresentationController only.

fn borrow(&self) -> &UIPresentationController

Immutably borrows from an owned value.

impl ClassType for UIPresentationController

const NAME: &'static str = "UIPresentationController"

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

type Super = NSObject

The superclass of this class.

type ThreadKind = dyn MainThreadOnly

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 Debug for UIPresentationController

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

Formats the value using the given formatter.

impl Deref for UIPresentationController

type Target = NSObject

The resulting type after dereferencing.

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

Dereferences the value.

impl Hash for UIPresentationController

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 UIPresentationController

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

where Self: Sized,

Increment the reference count of the receiver.

impl NSObjectProtocol for UIPresentationController

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 PartialEq for UIPresentationController

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 UIPresentationController

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

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

impl UIContentContainer for UIPresentationController

fn preferredContentSize(&self) -> CGSize

where Self: Sized + Message,

Available on crate features UIViewController and objc2-core-foundation only.

fn preferredContentSizeDidChangeForChildContentContainer( &self, container: &ProtocolObject<dyn UIContentContainer>, )

where Self: Sized + Message,

Available on crate feature UIViewController only.

fn systemLayoutFittingSizeDidChangeForChildContentContainer( &self, container: &ProtocolObject<dyn UIContentContainer>, )

where Self: Sized + Message,

Available on crate feature UIViewController only.

fn sizeForChildContentContainer_withParentContainerSize( &self, container: &ProtocolObject<dyn UIContentContainer>, parent_size: CGSize, ) -> CGSize

where Self: Sized + Message,

Available on crate features UIViewController and objc2-core-foundation only.

fn viewWillTransitionToSize_withTransitionCoordinator( &self, size: CGSize, coordinator: &ProtocolObject<dyn UIViewControllerTransitionCoordinator>, )

where Self: Sized + Message,

Available on crate features UIViewControllerTransitionCoordinator and objc2-core-foundation and UIViewController only.

fn willTransitionToTraitCollection_withTransitionCoordinator( &self, new_collection: &UITraitCollection, coordinator: &ProtocolObject<dyn UIViewControllerTransitionCoordinator>, )

where Self: Sized + Message,

Available on crate features UITraitCollection and UIViewControllerTransitionCoordinator and UIViewController only.

impl UIFocusEnvironment for UIPresentationController

fn preferredFocusEnvironments( &self, ) -> Retained<NSArray<ProtocolObject<dyn UIFocusEnvironment>>>

where Self: Sized + Message,

Available on crate feature UIFocus only.

The preferred focus environments define where to search for the default focused item in an environment, such as when focus updates programmatically. Starting from the target environment, each preferred focus environment is recursively searched in the order of the array until an eligible, focusable item is found. Preferred focus environments can include focusable and non-focusable items, in addition to non-item environments. Returning an empty array is equivalent to returning an array containing only ‘self’.

fn parentFocusEnvironment( &self, ) -> Option<Retained<ProtocolObject<dyn UIFocusEnvironment>>>

where Self: Sized + Message,

Available on crate feature UIFocus only.

The parent focus environment of this environment, or nil if no parent exists. NOTE: If you implement this method, you must return a non-nil value for parent focus environment, otherwise your focus environment will not participate in focus interactions.

fn focusItemContainer( &self, ) -> Option<Retained<ProtocolObject<dyn UIFocusItemContainer>>>

where Self: Sized + Message,

Available on crate feature UIFocus only.

The container of any child focus items in this focus environment, or nil if no container exists.

fn setNeedsFocusUpdate(&self)

where Self: Sized + Message,

Available on crate feature UIFocus only.

Marks this environment as needing a focus update, which if accepted will attempt to reset focus to this environment, or one of its preferred focus environments, on the next update cycle. If this environment does not currently contain the focused item, then calling this method has no effect. If a parent of this environment is also requesting focus, then this environment’s request is rejected in favor of the parent’s. NOTE: If you provide your own implementation, it must call [[UIFocusSystem focusSystemForEnvironment:self] requestFocusUpdateToEnvironment:self];

fn updateFocusIfNeeded(&self)

where Self: Sized + Message,

Available on crate feature UIFocus only.

Forces focus to be updated immediately. If there is an environment that has requested a focus update via -setNeedsFocusUpdate, and the request was accepted, then focus will be updated to that environment or one of its preferred focus environments. NOTE: If you provide your own implementation, it must call [[UIFocusSystem focusSystemForEnvironment:self] updateFocusIfNeeded];.

fn shouldUpdateFocusInContext(&self, context: &UIFocusUpdateContext) -> bool

where Self: Sized + Message,

Available on crate feature UIFocus only.

Asks whether the system should allow a focus update to occur.

fn didUpdateFocusInContext_withAnimationCoordinator( &self, context: &UIFocusUpdateContext, coordinator: &UIFocusAnimationCoordinator, )

where Self: Sized + Message,

Available on crate features UIFocus and UIFocusAnimationCoordinator only.

Called when the screen’s focused item has been updated to a new item. Use the animation coordinator to schedule focus-related animations in response to the update.

fn soundIdentifierForFocusUpdateInContext( &self, context: &UIFocusUpdateContext, ) -> Option<Retained<UIFocusSoundIdentifier>>

where Self: Sized + Message,

Available on crate feature UIFocus only.

Specifies an identifier corresponding to a sound that should be played for a focus update. Return UIFocusSoundIdentifierNone to opt out of sounds, UIFocusSoundIdentifierDefault for the system default sounds, a previously registered identifier for a custom sound, or nil to defer the decision to the parent.

fn preferredFocusedView(&self) -> Option<Retained<UIView>>

where Self: Sized + Message,

👎Deprecated

Available on crate features UIResponder and UIView and UIFocus only.

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

where Self: Sized + Message,

Available on crate feature UIFocus only.

The identifier of the focus group that this view belongs to. If this is nil, subviews inherit their superview’s focus group.

impl UITraitChangeObservable for UIPresentationController

fn unregisterForTraitChanges( &self, registration: &ProtocolObject<dyn UITraitChangeRegistration>, )

where Self: Sized + Message,

Available on crate feature UITraitCollection only.

impl UITraitEnvironment for UIPresentationController

fn traitCollection(&self) -> Retained<UITraitCollection>

where Self: Sized + Message,

Available on crate feature UITraitCollection only.

fn traitCollectionDidChange( &self, previous_trait_collection: Option<&UITraitCollection>, )

where Self: Sized + Message,

👎Deprecated: Use the trait change registration APIs declared in the UITraitChangeObservable protocol

Available on crate feature UITraitCollection only.

To be overridden as needed to provide custom behavior when the environment’s traits change.

impl DowncastTarget for UIPresentationController

impl Eq for UIPresentationController

impl UIAppearanceContainer for UIPresentationController