Struct CMMotionManager 

pub struct CMMotionManager { /* private fields */ }

Available on crate feature CMMotionManager only.

Apple’s documentation

Implementations

impl CMMotionManager

pub unsafe fn accelerometerUpdateInterval(&self) -> NSTimeInterval

pub unsafe fn setAccelerometerUpdateInterval( &self, accelerometer_update_interval: NSTimeInterval, )

Setter for accelerometerUpdateInterval.

pub unsafe fn isAccelerometerAvailable(&self) -> bool

pub unsafe fn isAccelerometerActive(&self) -> bool

pub unsafe fn accelerometerData(&self) -> Option<Retained<CMAccelerometerData>>

Available on crate features CMAccelerometer and CMLogItem only.

pub unsafe fn startAccelerometerUpdates(&self)

pub unsafe fn startAccelerometerUpdatesToQueue_withHandler( &self, queue: &NSOperationQueue, handler: CMAccelerometerHandler, )

Available on crate features CMAccelerometer and CMLogItem and block2 only.

Safety

• queue possibly has additional threading requirements.
• handler must be a valid pointer.

pub unsafe fn stopAccelerometerUpdates(&self)

pub unsafe fn gyroUpdateInterval(&self) -> NSTimeInterval

pub unsafe fn setGyroUpdateInterval(&self, gyro_update_interval: NSTimeInterval)

Setter for gyroUpdateInterval.

pub unsafe fn isGyroAvailable(&self) -> bool

pub unsafe fn isGyroActive(&self) -> bool

pub unsafe fn gyroData(&self) -> Option<Retained<CMGyroData>>

Available on crate features CMGyro and CMLogItem only.

pub unsafe fn startGyroUpdates(&self)

pub unsafe fn startGyroUpdatesToQueue_withHandler( &self, queue: &NSOperationQueue, handler: CMGyroHandler, )

Available on crate features CMGyro and CMLogItem and block2 only.

Safety

• queue possibly has additional threading requirements.
• handler must be a valid pointer.

pub unsafe fn stopGyroUpdates(&self)

pub unsafe fn magnetometerUpdateInterval(&self) -> NSTimeInterval

pub unsafe fn setMagnetometerUpdateInterval( &self, magnetometer_update_interval: NSTimeInterval, )

Setter for magnetometerUpdateInterval.

pub unsafe fn isMagnetometerAvailable(&self) -> bool

pub unsafe fn isMagnetometerActive(&self) -> bool

pub unsafe fn magnetometerData(&self) -> Option<Retained<CMMagnetometerData>>

Available on crate features CMLogItem and CMMagnetometer only.

pub unsafe fn startMagnetometerUpdates(&self)

pub unsafe fn startMagnetometerUpdatesToQueue_withHandler( &self, queue: &NSOperationQueue, handler: CMMagnetometerHandler, )

Available on crate features CMLogItem and CMMagnetometer and block2 only.

Safety

• queue possibly has additional threading requirements.
• handler must be a valid pointer.

pub unsafe fn stopMagnetometerUpdates(&self)

pub unsafe fn deviceMotionUpdateInterval(&self) -> NSTimeInterval

pub unsafe fn setDeviceMotionUpdateInterval( &self, device_motion_update_interval: NSTimeInterval, )

Setter for deviceMotionUpdateInterval.

pub unsafe fn availableAttitudeReferenceFrames() -> CMAttitudeReferenceFrame

Available on crate feature CMAttitude only.

pub unsafe fn attitudeReferenceFrame(&self) -> CMAttitudeReferenceFrame

Available on crate feature CMAttitude only.

pub unsafe fn isDeviceMotionAvailable(&self) -> bool

pub unsafe fn isDeviceMotionActive(&self) -> bool

pub unsafe fn deviceMotion(&self) -> Option<Retained<CMDeviceMotion>>

Available on crate features CMDeviceMotion and CMLogItem only.

pub unsafe fn startDeviceMotionUpdates(&self)

pub unsafe fn startDeviceMotionUpdatesToQueue_withHandler( &self, queue: &NSOperationQueue, handler: CMDeviceMotionHandler, )

Available on crate features CMDeviceMotion and CMLogItem and block2 only.

Safety

• queue possibly has additional threading requirements.
• handler must be a valid pointer.

pub unsafe fn startDeviceMotionUpdatesUsingReferenceFrame( &self, reference_frame: CMAttitudeReferenceFrame, )

Available on crate feature CMAttitude only.

pub unsafe fn startDeviceMotionUpdatesUsingReferenceFrame_toQueue_withHandler( &self, reference_frame: CMAttitudeReferenceFrame, queue: &NSOperationQueue, handler: CMDeviceMotionHandler, )

Available on crate features CMAttitude and CMDeviceMotion and CMLogItem and block2 only.

Safety

• queue possibly has additional threading requirements.
• handler must be a valid pointer.

pub unsafe fn stopDeviceMotionUpdates(&self)

pub unsafe fn showsDeviceMovementDisplay(&self) -> bool

pub unsafe fn setShowsDeviceMovementDisplay( &self, shows_device_movement_display: bool, )

Setter for showsDeviceMovementDisplay.

impl CMMotionManager

Methods declared on superclass NSObject.

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

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

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 CMMotionManager

fn as_ref(&self) -> &AnyObject

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

impl AsRef<CMMotionManager> for CMMotionManager

fn as_ref(&self) -> &Self

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

impl AsRef<NSObject> for CMMotionManager

fn as_ref(&self) -> &NSObject

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

impl Borrow<AnyObject> for CMMotionManager

fn borrow(&self) -> &AnyObject

Immutably borrows from an owned value.

impl Borrow<NSObject> for CMMotionManager

fn borrow(&self) -> &NSObject

Immutably borrows from an owned value.

impl ClassType for CMMotionManager

const NAME: &'static str = "CMMotionManager"

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

type Super = NSObject

The superclass of this class.

type ThreadKind = <<CMMotionManager 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 Debug for CMMotionManager

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

Formats the value using the given formatter.

impl Deref for CMMotionManager

type Target = NSObject

The resulting type after dereferencing.

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

Dereferences the value.

impl Hash for CMMotionManager

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 CMMotionManager

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

where Self: Sized,

Increment the reference count of the receiver.

impl NSObjectProtocol for CMMotionManager

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 CMMotionManager

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 CMMotionManager

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

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

impl DowncastTarget for CMMotionManager

impl Eq for CMMotionManager