Struct SKView

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pub struct SKView { /* private fields */ }

Available on crate feature SKView and crate feature objc2-app-kit and macOS only.

Expand description

Apple’s documentation

Implementations§

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Setter for allowsTransparency.

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pub unsafe fn ignoresSiblingOrder(&self) -> bool

Ignores sibling and traversal order to sort the rendered contents of a scene into the most efficient batching possible. This will require zPosition to be used in the scenes to properly guarantee elements are in front or behind each other.

This defaults to NO, meaning that sibling order overrides efficiency heuristics in the rendering of the scenes in the view.

Setting this to YES for a complex scene may substantially increase performance, but care must be taken as only zPosition determines render order before the efficiency heuristics are used.

Optional view delegate, see SKViewDelegate.

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pub unsafe fn setDelegate(&self, delegate: Option<&NSObject>)

Setter for delegate.

This is a weak property.

§Safety

pub unsafe fn presentScene_transition( &self, scene: &SKScene, transition: &SKTransition, )

Available on crate features SKEffectNode and SKNode and SKScene and SKTransition only.

Present an SKScene in the view, replacing the current scene.

If there is currently a scene being presented in the view, the transition is used to swap between them.

Parameter scene: the scene to present.

Parameter transition: the transition to use when presenting the scene.

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pub unsafe fn scene(&self) -> Option<Retained<SKScene>>

Available on crate features SKEffectNode and SKNode and SKScene only.

The currently presented scene, otherwise nil. If in a transition, the ‘incoming’ scene is returned.

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pub unsafe fn textureFromNode( &self, node: &SKNode, ) -> Option<Retained<SKTexture>>

Available on crate features SKNode and SKTexture only.

Create an SKTexture containing a snapshot of how it would have been rendered in this view. The texture is tightly cropped to the size of the node.

Parameter node: the node subtree to render to the texture.

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pub unsafe fn textureFromNode_crop( &self, node: &SKNode, crop: CGRect, ) -> Option<Retained<SKTexture>>

Available on crate features SKNode and SKTexture and objc2-core-foundation only.

Create an SKTexture containing a snapshot of how it would have been rendered in this view. The texture is cropped to the specified rectangle

Parameter node: the node subtree to render to the texture.

Parameter crop: the crop

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pub unsafe fn convertPoint_toScene( &self, point: CGPoint, scene: &SKScene, ) -> CGPoint

Available on crate features SKEffectNode and SKNode and SKScene and objc2-core-foundation only.

Converts a point from view space to scene space.

Parameter point: the point to convert.

Parameter scene: the scene to convert the point into.

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pub unsafe fn convertPoint_fromScene( &self, point: CGPoint, scene: &SKScene, ) -> CGPoint

Available on crate features SKEffectNode and SKNode and SKScene and objc2-core-foundation only.

Converts a point from scene space to view space.

Parameter point: the point to convert.

Parameter scene: the scene to convert the point into.

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impl SKView

Methods declared on superclass NSView.

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pub unsafe fn initWithFrame( this: Allocated<Self>, frame_rect: NSRect, ) -> Retained<Self>

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

§Safety

coder possibly has further requirements.

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impl SKView

Methods declared on superclass NSResponder.

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

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impl SKView

Methods declared on superclass NSObject.

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

Methods from Deref<Target = NSView>§

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pub unsafe fn superview(&self) -> Option<Retained<NSView>>

§Safety

This is not retained internally, you must ensure the object is still alive.

§Safety

This is not retained internally, you must ensure the object is still alive.

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pub fn isHidden(&self) -> bool

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pub fn setHidden(&self, hidden: bool)

Setter for isHidden.

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pub fn isHiddenOrHasHiddenAncestor(&self) -> bool

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pub unsafe fn getRectsBeingDrawn_count( &self, rects: mut const CGRect, count: *mut isize, )

§Safety

rects must be a valid pointer or null.
count must be a valid pointer or null.

§Safety

compare must be implemented correctly.
context must be a valid pointer or null.

pub fn resizeSubviewsWithOldSize(&self, old_size: CGSize)

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pub fn frame(&self) -> CGRect

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pub fn setFrame(&self, frame: CGRect)

Setter for frame.

Setter for bounds.

Setter for canDrawConcurrently.

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pub fn canDraw(&self) -> bool

👎Deprecated: If a view needs display, -drawRect: or -updateLayer will be called automatically when the view is able to draw. To check whether a view is in a window, call -window. To check whether a view is hidden, call -isHiddenOrHasHiddenAncestor.

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pub fn setNeedsDisplayInRect(&self, invalid_rect: CGRect)

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pub fn needsDisplay(&self) -> bool

👎Deprecated: Use NSScrollView to achieve scrolling views.

pub fn setAcceptsTouchEvents(&self, accepts_touch_events: bool)

👎Deprecated: Use allowedTouchTypes instead

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pub fn canDrawSubviewsIntoLayer(&self) -> bool

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pub fn setCanDrawSubviewsIntoLayer(&self, can_draw_subviews_into_layer: bool)

Setter for canDrawSubviewsIntoLayer.

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pub fn layoutSubtreeIfNeeded(&self)

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Setter for toolTip.

This is copied when set.

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pub unsafe fn addToolTipRect_owner_userData( &self, rect: CGRect, owner: &AnyObject, data: *mut c_void, ) -> isize

§Safety

owner should be of the correct type.
data must be a valid pointer or null.

Setter for preparedContentRect.

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pub fn allowsVibrancy(&self) -> bool

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pub fn viewDidChangeEffectiveAppearance(&self)

Override point for reacting to the effective appearance of the receiver changing. At this point effectiveAppearance property reflects the new appearance.

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pub unsafe fn nextKeyView(&self) -> Option<Retained<NSView>>

§Safety

This is not retained internally, you must ensure the object is still alive.

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pub unsafe fn setNextKeyView(&self, next_key_view: Option<&NSView>)

Setter for nextKeyView.

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pub unsafe fn print(&self, sender: Option<&AnyObject>)

§Safety

sender should be of the correct type.

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pub unsafe fn knowsPageRange(&self, range: *mut NSRange) -> bool

§Safety

range must be a valid pointer.

§Safety

options generic should be of the correct type.

Setter for additionalSafeAreaInsets.

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pub fn safeAreaRect(&self) -> CGRect

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pub fn prefersCompactControlSizeMetrics(&self) -> bool

When this property is true, any NSControls in the view or its descendants will be sized with compact metrics compatible with macOS 15 and earlier. Defaults to false

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pub fn setPrefersCompactControlSizeMetrics( &self, prefers_compact_control_size_metrics: bool, )

Setter for prefersCompactControlSizeMetrics.

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pub fn dragFile_fromRect_slideBack_event( &self, filename: &NSString, rect: CGRect, flag: bool, event: &NSEvent, ) -> bool

👎Deprecated: Use -beginDraggingSessionWithItems:event:source: instead

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👎Deprecated

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pub fn renewGState(&self)

👎Deprecated

Methods from Deref<Target = NSResponder>§

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pub unsafe fn nextResponder(&self) -> Option<Retained<NSResponder>>

§Safety

This is not retained internally, you must ensure the object is still alive.

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pub unsafe fn setNextResponder(&self, next_responder: Option<&NSResponder>)

Setter for nextResponder.

§Safety

This is unretained, you must ensure the object is kept alive while in use.

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pub unsafe fn tryToPerform_with( &self, action: Sel, object: Option<&AnyObject>, ) -> bool

§Safety

action must be a valid selector.
object should be of the correct type.

You should only override this method when you do not want the system-provided default behavior for the context menu hotkey, either for a specific key combination, or for the hotkey in general. For example, if your application already provides a different behavior for control-Return (the default context menu hotkey definition), and you want to preserve that behavior, you should override this method to handle that specific key combination, and then return without calling super. Note that the user may customize the hotkey to a different key combination, so in this example, if any other key combination is passed to your method, you would call super.

An implementation of this method should call [super contextMenuKeyDown:event] to pass the request up the responder chain. If the message reaches the application object, NSApplication’s implementation of this method will send showContextMenuForSelection: to the responder chain. If you do not call super, then no further handling of the key event will be performed.

Note: In some cases, showContextMenuForSelection: will be called without a prior call to contextMenuKeyDown:. This occurs when a view receives an Accessibility ShowMenu action, or when the user has created a Cocoa Text key binding to map a different key combination to the showContextMenuForSelection: action.

Parameter event: The key down event that matches the system-wide context menu hotkey combination.

See also: showContextMenuForSelection:

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pub unsafe fn noResponderFor(&self, event_selector: Sel)

§Safety

event_selector must be a valid selector.

§Safety

sender should be of the correct type.

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pub fn helpRequested(&self, event_ptr: &NSEvent)

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Methods from Deref<Target = NSObject>§

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

Handle messages the object doesn’t recognize.

See Apple’s documentation for details.

Methods from Deref<Target = AnyObject>§

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

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());

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

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

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.

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pub fn downcast_ref<T>(&self) -> Option<&T>
where T: DowncastTarget,

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`
    }
}