key-value-observing
What's the point of -primitiveValueForKey:?
-setPrimitiveValue:forKey: won\'t trigger KVO notifications. But in my brain, KVO only makes sense when something changes. But how can change开发者_Go百科 something when I only access it for read?[详细]
2023-01-24 04:44 分类：问答Getting an exception when using KVO
I am implementing MKMapView based application. In that 开发者_StackOverflow社区I am using an observer when we tap on a pin. the observer is code is follows,[详细]
2023-01-23 02:45 分类：问答Can you use KVO with Scripting Bridge
Can you use KVO with Scripting Bridge? I want to know if I can make an Scripting Bridge interface for my application and allow client applications to be notified by observing an object returned by on[详细]
2023-01-18 06:20 分类：问答Observing the editing property of a UITableViewController
Why can\'t I observe the editing property of an instance of UITableViewController? I\'m using the following code:[详细]
2023-01-18 03:52 分类：问答NSManagedObject and KVO vs Documentation
I have a custom NSManagedObject subclass, say, Person. I also have a UIView registered with -addObserver:forKeyPath:options:context: to observe various properties of a Person, some of which are persis[详细]
2023-01-16 16:14 分类：问答iPhone MKMapView annotations observers selectable once
I have different custom map annotations on my MKMapView, and when creating the custom view I add an observer and disable the default popup.[详细]
2023-01-16 09:43 分类：问答KVC array: getters vs indexed accessors?
I\'m confused by this: http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/KeyValueCoding/Concepts/AccessorConventions.html#//apple_ref/doc/uid/20002174-178830-BAJEDEFB[详细]
2023-01-12 10:54 分类：问答KVO problem "Cannot remove an observer"
I have an NSArrayController linked to a Core Data object, set to Auto Rearrange Content and filtered by a predicate. All is well until I try to nullify a relationship and assign another. At that point[详细]
2023-01-09 10:39 分类：问答Do you need to call willChangeValueForKey: and didChangeValueForKey:?
I thought home-cooked @property setters were supposed to look like this: -(void) setFoo:(Foo *)newFoo {[详细]
2023-01-07 04:26 分类：问答Registering a bool for a NSNotification
I\'m trying to wrap my head around NSNotification but can\'t seem to get it to work. Think I\'m misunderstanding how to register for an notification.[详细]
2023-01-06 23:15 分类：问答
![Interactive visualization of a graph in python [closed]](https://www.devze.com/res/2023/04-10/09/92d32fe8c0d22fb96bd6f6e8b7d1f457.gif)
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