Struct HMActionSet

Source

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

Available on crate feature HMActionSet only.

Expand description

This class represents a collection of action objects that can be executed. The order of execution of these actions is undefined.

Implementations§

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impl HMActionSet

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

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pub unsafe fn name(&self) -> Retained<NSString>

The name of the action set.

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pub unsafe fn actions(&self) -> Retained<NSSet<HMAction>>

Available on crate feature HMAction only.

Set of HMAction objects that represent the individual items of the action set.

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pub unsafe fn isExecuting(&self) -> bool

Specifies whether the action set is currently executing or not.

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pub unsafe fn actionSetType(&self) -> Retained<NSString>

Specifies the action set type - user-defined, trigger-owned or one of the builtin types. Builtin action sets cannot be removed from the home. trigger-owned action sets cannot be executed, renamed or associated with another trigger.

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pub unsafe fn uniqueIdentifier(&self) -> Retained<NSUUID>

A unique identifier for the action set.

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pub unsafe fn lastExecutionDate(&self) -> Option<Retained<NSDate>>

Specifies the last execution date for the action set.

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pub unsafe fn updateName_completionHandler( &self, name: &NSString, completion: HMErrorBlock, )

Available on crate features HMDefines and block2 only.

This method is used to change the name of the action set.

Parameter name: New name for the action set.

Parameter completion: Block that is invoked once the request is processed. The NSError provides more information on the status of the request, error will be nil on success.

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pub unsafe fn addAction_completionHandler( &self, action: &HMAction, completion: HMErrorBlock, )

Available on crate features HMAction and HMDefines and block2 only.

Adds an action to the action set.

Parameter action: Action object to add to the action set.

Parameter completion: Block that is invoked once the request is processed. The NSError provides more information on the status of the request, error will be nil on success.

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pub unsafe fn removeAction_completionHandler( &self, action: &HMAction, completion: HMErrorBlock, )

Available on crate features HMAction and HMDefines and block2 only.

Removes an existing action from the action set.

Parameter action: Action object to remove from the action set.

Parameter completion: Block that is invoked once the request is processed. The NSError provides more information on the status of the request, error will be nil on success.

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impl HMActionSet

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.

§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`
    }
}