key-value-observing

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Key Value Observing and NSButton state

I\'m trying to observe checkbox status and make appropriate changes in the app when checkbox status changes. In a window manager that manages the window with checkbox I have following observer setup:[详细]

2023-01-06 13:53 分类：问答
How do I ensure proper KVO behaviour for my NSSlider-like custom control?

Let\'s say you have a custom control similar to NSSlider but with support for choosing a range of values, instead of a single value. The obvious choice of properties is minValue, maxValue, leftValue,[详细]

2023-01-05 18:41 分类：问答
Using KVO with custom UITableViewCell and CoreData

I\'ve read over a ton of documentation and tutorials about KVO but I haven\'t found any that I\'ve been able to abstract for my application.I have a table view that uses a custom UITableViewCell class[详细]

2023-01-05 03:21 分类：问答
Subclassing/extending NSMutabelSet?

Is it possible to to subclass NSMutableSet? I need to do this in order to not retain objects contained in this set. The purpose todo that is to make an set of observers and those do not need to be ret[详细]

2023-01-04 02:51 分类：问答
How to be notified when a UIView detached from its superView?

It seems that the UIView has not methods like \"didRemoveFromSuperview\" or \"willRemoveFromSuperview\".Then,How to listen to the event when a U开发者_开发百科IView removed from its superView?I should[详细]

2023-01-03 20:27 分类：问答
Difference between mutableArrayValueForKey and calling insertObject:inEmployeesAtIndex: directly

I have a question regarding using KVO-compliant methods to insert/remove objects from an array. I\'m working through Aaron Hillegass\' Cocoa Programming for Mac OS X and I saw the following line of co[详细]

2023-01-03 00:51 分类：问答
Do you know of any Key-Value-Coding and Key-Value-Observing session videos on the net?

I know Apple is not the only ressource out there, and many people create great videos in conferences and presentations.[详细]

2023-01-02 23:06 分类：问答
If I wanted to write my own KVO-compliant setter method, would it look something like this?

- (void)setFirstName:(NSString*)firstNameValue { [self willChangeValueForKey:@\"firstName\"]; [firstName release];[详细]

2023-01-02 12:08 分类：问答
How can I write cocoa bindings as code instead of in the Interface Builder?

In my model I got an NSMutableArray that keeps track of a changing number of elements. In my view I got a NSTextField that shows the number of elements.[详细]

2023-01-01 19:55 分类：问答
iPhone OS: Is there a way to set up KVO between two ManagedObject Entities?

I have 2 entities I want to link with KVO, one a single statTracker class that keeps track of different stats and the other an achievement class that contains information about achievements. Ideally w[详细]

2022-12-31 23:59 分类：问答