objc2_foundation

Trait NSObjectNSKeyValueSharedObserverRegistration

Source 
pub unsafe trait NSObjectNSKeyValueSharedObserverRegistration:
    ClassType
    + Sized
    + Sealed {
    // Provided method
    unsafe fn setSharedObservers(
        &self,
        shared_observers: Option<&NSKeyValueSharedObserversSnapshot>,
    ) { ... }
}
Available on crate feature NSKeyValueSharedObservers only.
Expand description

Category “NSKeyValueSharedObserverRegistration” on NSObject.

Provided Methods§

Source

unsafe fn setSharedObservers( &self, shared_observers: Option<&NSKeyValueSharedObserversSnapshot>, )

Register shared observations.

A shared observation collection might be shared between multiple observables to minimise registration work. Shared observers remain registered throughout the object’s lifetime and do not need to be removed using removeObserver:.

An observable may only have one set of shared observations. Subsequent calls to this method will replace existing shared observations.

  • Parameter sharedObservers: shared observer collection that was initialized with the class of this object
  • Invariant: sharedObserers was initialized with the class of this object
  • Throws: Exception if the class of the receiving observable object does not match the class with which sharedObserers was initialized.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors§