< Previous PageNext Page > Hide TOC

Deprecated NSKeyValueObserving Methods

A method identified as deprecated has been superseded and may become unsupported in the future.

Deprecated in Mac OS X v10.5 and later

setKeys:triggerChangeNotificationsForDependentKey:

Configures the receiver to post change notifications for a given property if any of the properties specified in a given array changes. (Deprecated in Mac OS X v10.5 and later. You should use the method keyPathsForValuesAffectingValueForKey: instead.)

+ (void)setKeys:(NSArray *)keys triggerChangeNotificationsForDependentKey:(NSString *)dependentKey

Parameters

keys

The names of the properties upon which the value of the property identified by dependentKey depends.

dependentKey

The name of a property whose value depends on the properties specified by keys.

Discussion

Invocations of will- and did-change KVO notification methods for any key in keys will automatically invoke the corresponding change notification methods for dependentKey. The receiver will not receive willChange/didChange messages to generate the notifications.

Dependencies should be registered before any instances of the receiving class are created, so you typically invoke this method in a class's initialize method, as illustrated in the following example.

+ (void)initialize

{

    [self setKeys:[NSArray arrayWithObjects:@"firstName", @"lastName", nil]

          triggerChangeNotificationsForDependentKey:@"fullName"];

}

Availability

• Deprecated in Mac OS X v10.5 and later.

Related Sample Code

• CoreRecipes
• Dicey
• iSpend
• QTRecorder
• Reducer

Declared In

< Previous PageNext Page > Hide TOC