AddObserverForKeyPathOptionsContext Method (anObserver, keyPath, options, context)

Registers anObserver to receive KVO notifications for the specified key-path relative to the receiver.

Original signature is '- (void)addObserver:(NSObject *)anObserver forKeyPath:(NSString *)keyPath options:(NSKeyValueObservingOptions)options context:(void *)context'

Available in Mac OS X v10.3 and later.

Declaration Syntax

Visual Basic

Visual C++

public virtual void AddObserverForKeyPathOptionsContext(
	NSObject anObserver,
	NSString keyPath,
	NSKeyValueObservingOptions options,
	IntPtr context
)

Public Overridable Sub AddObserverForKeyPathOptionsContext ( _
	anObserver As NSObject, _
	keyPath As NSString, _
	options As NSKeyValueObservingOptions, _
	context As IntPtr _
)

public:
virtual void AddObserverForKeyPathOptionsContext(
	NSObject^ anObserver, 
	NSString^ keyPath, 
	NSKeyValueObservingOptions options, 
	IntPtr context
)

Parameters

anObserver (NSObject): The object to register for KVO notifications. The observer must implement the key-value observing method observeValueForKeyPath:ofObject:change:context:.

keyPath (NSString): The key path, relative to the receiver, of the property to observe. This value must not be nil.

options (NSKeyValueObservingOptions): A combination of the NSKeyValueObservingOptions values that specifies what is included in observation notifications. For possible values, see “NSKeyValueObservingOptions.”

context (IntPtr): Arbitrary data that is passed to anObserver in observeValueForKeyPath:ofObject:change:context:.

Version Information

Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)

Assembly: Monobjc.Foundation (Module: Monobjc.Foundation)