NSKeyValueObservingOptions Enum
Definition
Important
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An enumeration of values specifying options to be used with the AddObserver(NSObject, String, NSKeyValueObservingOptions, IntPtr) method.
This enumeration supports a bitwise combination of its member values.
[System.Flags]
public enum NSKeyValueObservingOptionstype NSKeyValueObservingOptions = - Inheritance
-
NSKeyValueObservingOptions
- Attributes
Fields
| Name | Value | Description |
|---|---|---|
| New | 1 | Request that new values be delivered to the observer. |
| Old | 2 | Requests that old values be delivered to the observer. |
| OldNew | 3 | Requests that both old and new values be delivered to the observer. |
| Initial | 4 | Use this to send a notification on first use, without waiting for an actual change to take place. |
| Prior | 8 | If set, notifications are sent before and after the change to the property is made. Otherwise the notifications are only sent after the property has been set. |