NSObject.ObserveValue(NSString, NSObject, NSDictionary, IntPtr) Method

Definition

Namespace:: Foundation

Assembly:: Xamarin.iOS.dll

Assembly:: Xamarin.Mac.dll

Indicates that the value at the specified keyPath relative to this object has changed.

[Foundation.Export("observeValueForKeyPath:ofObject:change:context:")]
public virtual void ObserveValue (Foundation.NSString keyPath, Foundation.NSObject ofObject, Foundation.NSDictionary change, IntPtr context);

abstract member ObserveValue : Foundation.NSString * Foundation.NSObject * Foundation.NSDictionary * nativeint -> unit
override this.ObserveValue : Foundation.NSString * Foundation.NSObject * Foundation.NSDictionary * nativeint -> unit

Parameters

keyPath: NSString

Key-path to use to perform the value lookup. The keypath consists of a series of lowercase ASCII-strings with no spaces in them separated by dot characters.

ofObject: NSObject

change: NSDictionary

context: IntPtr

Attributes: ExportAttribute

Remarks

This method is invoked if you have registered an observer using the AddObserver(NSObject, String, NSKeyValueObservingOptions, IntPtr) method

Applies to