key-value-observing
When using KVO is it necessary to remove self as an observer of self in -dealloc?
in my NSObject subclass\'s -init method the instance adds itself as an observer of some of its own keyPaths in order to trigger an action that should occur any time one of the properties in question i[详细]
2023-03-11 06:21 分类：问答can i get data from the object from observeValueForKeyPath iphone
I want to get a number of variables from the target of the function - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context[详细]
2023-03-11 02:09 分类：问答Observing dependent keys across a to-many relationship
I have a Core Data entity, \"bid\", which has a relationship to many \"items\", called \"itemLink\". in IB, I have a text field bound to \"total\", and that almost works.[详细]
2023-03-10 01:34 分类：问答IOS Core Data with KVO - valueForKey: for custom property on an NSManagedObject subclass?
I have two NSManagedObject subclasses derived from entities, ActivityMember and Member. Member has a property called name, and ActivityMember, through a one to one relationship with Member, has a prop[详细]
2023-03-09 07:04 分类：问答how to see what an object is observing in cocoa
I know there is a way to see what properties are being observed on an object with observationInfo but is there a way to see what an object is set to observe?[详细]
2023-03-08 15:58 分类：问答Is this Key Value Compliant?
If I @synthesize my property (artist) everything works fine add observer for keyPath artist.name call [myObj setValue:newArtist forKey:@\"artist\"];[详细]
2023-03-08 10:31 分类：问答How reliable is KVO with UIKit
Important: Not all classes are KVO-compliant for all properties. You can ensure your own classes are KVO-compliant by following the steps[详细]
2023-03-08 06:28 分类：问答KVO for dependent property depending on itself
I\'ve defined two properties with corresponding ivars and synthesized them: @property (nonatomic,copy) NSString* title;[详细]
2023-03-05 03:15 分类：问答KVO AVAudioPlayer not working
I am trying to observe the \"currentTime\" property of AVAudioPlayer. But the method isn\'t even being called... I need it to set the position of a UISlider..[详细]
2023-03-04 17:19 分类：问答KVO versus NSNotifications [duplicate]
This question already has an answer here: NSNotification VS KVO (1 answer) 开发者_如何学Python Closed 8 years ago.[详细]
2023-03-02 23:43 分类：问答
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