instance-variables

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Var visible in the ViewDIdLoad but not somewhere else

I\'m programming one iphone app, and there is a problem; I can use a NSDate variable in the viewDidLoad method but not somewhere else! How can it be made? how can it be resolved?[详细]

2023-03-02 12:08 分类：问答
AVAssetImageGeneratorCompletionHandler - how to set or return variables?

i´m using the AVAssetImageGenerator to get images from a movieclip without playing it before. Now i´ve got a question how to set up variables in the loop of a handler?[详细]

2023-03-01 15:48 分类：问答
Mutable vs immutable object for instance variable in objective C

I have a class with a property sampleNames. It is of type NSSet. The instance variable I plan to use will be NSMutableSet.[详细]

2023-03-01 15:10 分类：问答
Flash: which characters are allowed in instance names?

Flash tells me that instance names must contain \"alphanumeric开发者_C百科 characters, supported symbols, and no whitespace\". I\'ve found the underscore is allowed, but not the minus sign.[详细]

2023-02-25 05:48 分类：问答
Best way of declaring private variables in cocoa

I would like to know what the recommendations are for declaring private instance variables in cocoa. This question is in the context of developing apps on the iPhone.[详细]

2023-02-24 05:00 分类：问答
Instance variable in Stripes

I\'m trying to find a way to create an instance variable within the Stripes application context. Something that i would do in the init() method of a Servlet while using hand-coded servlets.[详细]

2023-02-23 10:46 分类：问答
How do I assign a comment to current_user?

I have this line in my create action @comment = @video.comments.new(params[:comment]) A comment also belongs to the user who creates it. How can I assign it to the current_user? Where does it fit i[详细]

2023-02-22 03:16 分类：问答
Public IBOutlet

I want to use an IBOutlet from classA on classB Why is this not working? ClassA.h @interface ClassA : UIViewController {[详细]

2023-02-21 01:17 分类：问答
Using an object as an instance variable in a basic Objective C program, I get an "expected specifier-qualifier-list" error

I am writing a simple program that uses an object *center from an XYPoint class as an instance variable.[详细]

2023-02-20 12:38 分类：问答
iPhone - Synthesize and ivar use from outside the class?

I\'ve read many things about the @synthesize call. About its use, ... So I have made a test, and its result gives me a strange feeling.[详细]

2023-02-19 11:43 分类：问答