Struct VNRequest

#[repr(C)]
pub struct VNRequest { /* private fields */ }

Available on crate feature VNRequest only.

VNRequest objects describe the operation to be performed as well as act as the recipient of the operation’s resultant observations.

VNRequest objects are instantiated in a pre-configured nominal state. Prior to sending a VNRequest to a request handler to perform a desired operation, the default configuration can be changed by modifying the values of VNRequest properties. The VNRequest class itself acts as a base class and is not meant to be directly instantiated.

See also Apple’s documentation

Implementations

impl VNRequest

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

Creates a new VNRequest with no completion handler.

pub unsafe fn initWithCompletionHandler( this: Allocated<Self>, completion_handler: VNRequestCompletionHandler, ) -> Retained<Self>

Available on crate feature block2 only.

Creates a new VNRequest with an optional completion handler.

Parameter completionHandler: The block to be invoked after the request has completed its processing. The completion handler gets executed on the same dispatch queue as the request being executed.

pub unsafe fn preferBackgroundProcessing(&self) -> bool

A hint used to minimize the resource burden of the request. Memory footprint, processing footprint and/or CPU/GPU contention will be reduced (depending on the request), at the potential cost of longer execution time. This can help, for example, with ensuring UI updates and rendering are not getting blocked by Vision processing.

pub unsafe fn setPreferBackgroundProcessing( &self, prefer_background_processing: bool, )

Setter for preferBackgroundProcessing.

pub unsafe fn usesCPUOnly(&self) -> bool

👎Deprecated

This property, if set to YES, signifies that the request should be performed exclusively on the CPU and not on the GPU. The default value is NO, which signifies that the request is free to leverage the GPU to accelerate any work the request may require.

pub unsafe fn setUsesCPUOnly(&self, uses_cpu_only: bool)

👎Deprecated

Setter for usesCPUOnly.

pub unsafe fn results(&self) -> Option<Retained<NSArray<VNObservation>>>

Available on crate feature VNObservation only.

The collection of VNObservations generated by the processing of the request.

The only valid time to access this property is after the request has been processed by a request handler. If the request failed, this property will be nil; otherwise, it will be an array of zero or more VNObservation subclasses specific to the VNRequest subclass.

pub unsafe fn completionHandler(&self) -> VNRequestCompletionHandler

Available on crate feature block2 only.

The completion handler block that will be invoked after the request has completed processing.

pub unsafe fn revision(&self) -> NSUInteger

The specific algorithm or implementation revision that is to be used to perform the request.

pub unsafe fn setRevision(&self, revision: NSUInteger)

Setter for revision.

pub unsafe fn supportedRevisions() -> Retained<NSIndexSet>

Provides the collection of currently-supported algorithm or implementation versions for the class of request.

This method allows clients to introspect at runtime what capabilities are available for each class of VNRequest in the Vision framework.

pub unsafe fn defaultRevision() -> NSUInteger

Provides the revision of the request that was latest for the particular SDK that was linked with the client application.

pub unsafe fn currentRevision() -> NSUInteger

Provides the current revision supported by the request.

pub unsafe fn cancel(&self)

Tries to abort the request as soon as possible. Results will be nil. The completionHandler (if present) will be called with an error of VNErrorRequestCancelled.

impl VNRequest

Methods declared on superclass NSObject.

pub unsafe fn new() -> Retained<Self>

impl VNRequest

pub unsafe fn supportedComputeStageDevicesAndReturnError( &self, ) -> Result<Retained<NSDictionary<VNComputeStage, NSArray<ProtocolObject<dyn MLComputeDeviceProtocol>>>>, Retained<NSError>>

Available on crate features VNTypes and objc2-core-ml only.

Obtain the collection of compute device per stage that are supported by the request.

This method’s result is based on the current state of configuration of the target request at the time of the call.

Parameter error: The address of a variable that will be populated with the error that describes the failure. If the caller does not require this information, NULL can be passed.

Returns: A dictionary of per-stage supported compute devices, or nil if an error occurs.

pub unsafe fn computeDeviceForComputeStage( &self, compute_stage: &VNComputeStage, ) -> Option<Retained<ProtocolObject<dyn MLComputeDeviceProtocol>>>

Available on crate features VNTypes and objc2-core-ml only.

Determine what the currently configured compute device is for a specific compute stage.

Parameter computeStage: The compute stage to be introspected.

Returns: The currently assigned compute device, or nil if there is no explicit assignment.

pub unsafe fn setComputeDevice_forComputeStage( &self, compute_device: Option<&ProtocolObject<dyn MLComputeDeviceProtocol>>, compute_stage: &VNComputeStage, )

Available on crate features VNTypes and objc2-core-ml only.

Assign a specific compute device for a compute stage.

It is important to note that any compute device can be configured for a given compute stage. Only when the request is performed is the validity of the (compute device / compute stage) assignments checked. Valid compute devices for a request’s compute stages can be obtained via -supportedComputeStageDevicesAndReturnError:.

Parameter computeDevice: The compute device to assign to the compute stage. Passing nil for this parameter will remove any explicit compute device assignment, allowing Vision to select which device to use.

Parameter computeStage: The compute stage being configured.

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

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.

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,

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 VNRequest

fn as_ref(&self) -> &AnyObject

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

impl AsRef<NSObject> for VNRequest

fn as_ref(&self) -> &NSObject

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

impl AsRef<VNRequest> for VNCalculateImageAestheticsScoresRequest

Available on crate feature VNCalculateImageAestheticsScoresRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNClassifyImageRequest

Available on crate feature VNClassifyImageRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNCoreMLRequest

Available on crate feature VNCoreMLRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNDetectAnimalBodyPoseRequest

Available on crate feature VNDetectAnimalBodyPoseRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNDetectBarcodesRequest

Available on crate feature VNDetectBarcodesRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNDetectContoursRequest

Available on crate feature VNDetectContoursRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNDetectDocumentSegmentationRequest

Available on crate feature VNDetectDocumentSegmentationRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNDetectFaceCaptureQualityRequest

Available on crate feature VNDetectFaceCaptureQualityRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNDetectFaceLandmarksRequest

Available on crate feature VNDetectFaceLandmarksRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNDetectFaceRectanglesRequest

Available on crate feature VNDetectFaceRectanglesRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNDetectHorizonRequest

Available on crate feature VNDetectHorizonRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNDetectHumanBodyPose3DRequest

Available on crate features VNStatefulRequest and VNDetectHumanBodyPose3DRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNDetectHumanBodyPoseRequest

Available on crate feature VNDetectHumanBodyPoseRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNDetectHumanHandPoseRequest

Available on crate feature VNDetectHumanHandPoseRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNDetectHumanRectanglesRequest

Available on crate feature VNDetectHumanRectanglesRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNDetectRectanglesRequest

Available on crate feature VNDetectRectanglesRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNDetectTextRectanglesRequest

Available on crate feature VNDetectTextRectanglesRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNDetectTrajectoriesRequest

Available on crate features VNStatefulRequest and VNDetectTrajectoriesRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNGenerateAttentionBasedSaliencyImageRequest

Available on crate feature VNGenerateAttentionBasedSaliencyImageRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNGenerateForegroundInstanceMaskRequest

Available on crate feature VNGenerateForegroundInstanceMaskRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNGenerateImageFeaturePrintRequest

Available on crate feature VNGenerateImageFeaturePrintRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNGenerateObjectnessBasedSaliencyImageRequest

Available on crate feature VNGenerateObjectnessBasedSaliencyImageRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNGenerateOpticalFlowRequest

Available on crate features VNTargetedImageRequest and VNGenerateOpticalFlowRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNGeneratePersonInstanceMaskRequest

Available on crate feature VNGeneratePersonInstanceMaskRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNGeneratePersonSegmentationRequest

Available on crate features VNStatefulRequest and VNGeneratePersonSegmentationRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNHomographicImageRegistrationRequest

Available on crate features VNTargetedImageRequest and VNImageRegistrationRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNImageBasedRequest

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNImageRegistrationRequest

Available on crate features VNTargetedImageRequest and VNImageRegistrationRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNRecognizeAnimalsRequest

Available on crate feature VNRecognizeAnimalsRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNRecognizeTextRequest

Available on crate feature VNRecognizeTextRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNRequest

fn as_ref(&self) -> &Self

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

impl AsRef<VNRequest> for VNStatefulRequest

Available on crate feature VNStatefulRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNTargetedImageRequest

Available on crate feature VNTargetedImageRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNTrackHomographicImageRegistrationRequest

Available on crate features VNStatefulRequest and VNTrackHomographicImageRegistrationRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNTrackObjectRequest

Available on crate features VNTrackingRequest and VNTrackObjectRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNTrackOpticalFlowRequest

Available on crate features VNStatefulRequest and VNTrackOpticalFlowRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNTrackRectangleRequest

Available on crate features VNTrackingRequest and VNTrackRectangleRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNTrackTranslationalImageRegistrationRequest

Available on crate features VNStatefulRequest and VNTrackTranslationalImageRegistrationRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNTrackingRequest

Available on crate feature VNTrackingRequest only.

fn as_ref(&self) -> &VNRequest

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

impl AsRef<VNRequest> for VNTranslationalImageRegistrationRequest

Available on crate features VNTargetedImageRequest and VNImageRegistrationRequest only.

fn as_ref(&self) -> &VNRequest

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

impl Borrow<AnyObject> for VNRequest

fn borrow(&self) -> &AnyObject

Immutably borrows from an owned value.

impl Borrow<NSObject> for VNRequest

fn borrow(&self) -> &NSObject

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNCalculateImageAestheticsScoresRequest

Available on crate feature VNCalculateImageAestheticsScoresRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNClassifyImageRequest

Available on crate feature VNClassifyImageRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNCoreMLRequest

Available on crate feature VNCoreMLRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNDetectAnimalBodyPoseRequest

Available on crate feature VNDetectAnimalBodyPoseRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNDetectBarcodesRequest

Available on crate feature VNDetectBarcodesRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNDetectContoursRequest

Available on crate feature VNDetectContoursRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNDetectDocumentSegmentationRequest

Available on crate feature VNDetectDocumentSegmentationRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNDetectFaceCaptureQualityRequest

Available on crate feature VNDetectFaceCaptureQualityRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNDetectFaceLandmarksRequest

Available on crate feature VNDetectFaceLandmarksRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNDetectFaceRectanglesRequest

Available on crate feature VNDetectFaceRectanglesRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNDetectHorizonRequest

Available on crate feature VNDetectHorizonRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNDetectHumanBodyPose3DRequest

Available on crate features VNStatefulRequest and VNDetectHumanBodyPose3DRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNDetectHumanBodyPoseRequest

Available on crate feature VNDetectHumanBodyPoseRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNDetectHumanHandPoseRequest

Available on crate feature VNDetectHumanHandPoseRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNDetectHumanRectanglesRequest

Available on crate feature VNDetectHumanRectanglesRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNDetectRectanglesRequest

Available on crate feature VNDetectRectanglesRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNDetectTextRectanglesRequest

Available on crate feature VNDetectTextRectanglesRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNDetectTrajectoriesRequest

Available on crate features VNStatefulRequest and VNDetectTrajectoriesRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNGenerateAttentionBasedSaliencyImageRequest

Available on crate feature VNGenerateAttentionBasedSaliencyImageRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNGenerateForegroundInstanceMaskRequest

Available on crate feature VNGenerateForegroundInstanceMaskRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNGenerateImageFeaturePrintRequest

Available on crate feature VNGenerateImageFeaturePrintRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNGenerateObjectnessBasedSaliencyImageRequest

Available on crate feature VNGenerateObjectnessBasedSaliencyImageRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNGenerateOpticalFlowRequest

Available on crate features VNTargetedImageRequest and VNGenerateOpticalFlowRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNGeneratePersonInstanceMaskRequest

Available on crate feature VNGeneratePersonInstanceMaskRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNGeneratePersonSegmentationRequest

Available on crate features VNStatefulRequest and VNGeneratePersonSegmentationRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNHomographicImageRegistrationRequest

Available on crate features VNTargetedImageRequest and VNImageRegistrationRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNImageBasedRequest

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNImageRegistrationRequest

Available on crate features VNTargetedImageRequest and VNImageRegistrationRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNRecognizeAnimalsRequest

Available on crate feature VNRecognizeAnimalsRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNRecognizeTextRequest

Available on crate feature VNRecognizeTextRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNStatefulRequest

Available on crate feature VNStatefulRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNTargetedImageRequest

Available on crate feature VNTargetedImageRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNTrackHomographicImageRegistrationRequest

Available on crate features VNStatefulRequest and VNTrackHomographicImageRegistrationRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNTrackObjectRequest

Available on crate features VNTrackingRequest and VNTrackObjectRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNTrackOpticalFlowRequest

Available on crate features VNStatefulRequest and VNTrackOpticalFlowRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNTrackRectangleRequest

Available on crate features VNTrackingRequest and VNTrackRectangleRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNTrackTranslationalImageRegistrationRequest

Available on crate features VNStatefulRequest and VNTrackTranslationalImageRegistrationRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNTrackingRequest

Available on crate feature VNTrackingRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl Borrow<VNRequest> for VNTranslationalImageRegistrationRequest

Available on crate features VNTargetedImageRequest and VNImageRegistrationRequest only.

fn borrow(&self) -> &VNRequest

Immutably borrows from an owned value.

impl ClassType for VNRequest

const NAME: &'static str = "VNRequest"

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

type Super = NSObject

The superclass of this class.

type ThreadKind = <<VNRequest 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 VNRequest

type Result = VNRequest

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

impl Debug for VNRequest

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

Formats the value using the given formatter.

impl Deref for VNRequest

type Target = NSObject

The resulting type after dereferencing.

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

Dereferences the value.

impl Hash for VNRequest

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 VNRequest

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

where Self: Sized,

Increment the reference count of the receiver.

impl NSCopying for VNRequest

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 VNRequest

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 VNRequest

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 VNRequest

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

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

impl DowncastTarget for VNRequest

impl Eq for VNRequest