Trait NSObjectNSKeyValueObserving 

pub unsafe trait NSObjectNSKeyValueObserving:
    ClassType
    + Sized
    + Sealed {
    // Provided method
    unsafe fn observeValueForKeyPath_ofObject_change_context(
        &self,
        key_path: Option<&NSString>,
        object: Option<&AnyObject>,
        change: Option<&NSDictionary<NSKeyValueChangeKey, AnyObject>>,
        context: *mut c_void,
    ) { ... }
}

Available on crate feature NSKeyValueObserving only.

Category “NSKeyValueObserving” on NSObject.

Provided Methods

unsafe fn observeValueForKeyPath_ofObject_change_context( &self, key_path: Option<&NSString>, object: Option<&AnyObject>, change: Option<&NSDictionary<NSKeyValueChangeKey, AnyObject>>, context: *mut c_void, )

Available on crate features NSDictionary and NSString only.

Safety

• object should be of the correct type.
• change generic should be of the correct type.
• context must be a valid pointer or null.

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

impl NSObjectNSKeyValueObserving for NSObject