Struct CPRouteInformation

Source

pub struct CPRouteInformation { /* private fields */ }

Available on crate feature CPRouteInformation only.

Expand description

CPRouteInformation describes information pertaining to a route that is necessary for rerouting.

Implementations§

Source §

impl CPRouteInformation

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pub unsafe fn initWithManeuvers_laneGuidances_currentManeuvers_currentLaneGuidance_tripTravelEstimates_maneuverTravelEstimates( this: Allocated<Self>, maneuvers: &NSArray<CPManeuver>, lane_guidances: &NSArray<CPLaneGuidance>, current_maneuvers: &NSArray<CPManeuver>, current_lane_guidance: &CPLaneGuidance, trip_travel_estimates: &CPTravelEstimates, maneuver_travel_estimates: &CPTravelEstimates, ) -> Retained<Self>

Available on crate features CPLaneGuidance and CPManeuver and CPTravelEstimates only.

Initialize a CPRouteInformation object with maneuvers, lane guidances, the current maneuvers, the current lane guidance, and trip and current maneuver travel estimates.

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

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pub unsafe fn maneuvers(&self) -> Retained<NSArray<CPManeuver>>

Available on crate feature CPManeuver only.

maneuvers is an array of CPManeuver objects, each describes a single maneuver.

This property is not atomic.

§Safety

This might not be thread-safe.

Source

pub unsafe fn laneGuidances(&self) -> Retained<NSArray<CPLaneGuidance>>

Available on crate feature CPLaneGuidance only.

laneGuidances is an array of CPLaneGuidance objects, each describes a single lane guidance.

This property is not atomic.

§Safety

This might not be thread-safe.

Source

pub unsafe fn currentManeuvers(&self) -> Retained<NSArray<CPManeuver>>

Available on crate feature CPManeuver only.

currentManeuvers is an array of CPManeuver objects, describing the current maneuvers.

This property is not atomic.

§Safety

This might not be thread-safe.

Source

pub unsafe fn currentLaneGuidance(&self) -> Retained<CPLaneGuidance>

Available on crate feature CPLaneGuidance only.

currentLaneGuidance is a CPLaneGuidance object, describing the current lane guidance.

This property is not atomic.

§Safety

This might not be thread-safe.

Source

pub unsafe fn tripTravelEstimates(&self) -> Retained<CPTravelEstimates>

Available on crate feature CPTravelEstimates only.

tripTravelEstimates is a CPTravelEstimates object, describing the travel estimates for the current trip.

This property is not atomic.

§Safety

This might not be thread-safe.

Source

pub unsafe fn maneuverTravelEstimates(&self) -> Retained<CPTravelEstimates>

Available on crate feature CPTravelEstimates only.

maneuverTravelEstimates is a CPTravelEstimates object, describing the travel estimates for the first maneuver in the list of current maneuvers.

This property is not atomic.

§Safety

This might not be thread-safe.

Source §

impl CPRouteInformation

Methods declared on superclass NSObject.

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

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());

Source

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.

Source

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`
    }
}