instance-variables

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dynamic variable names using Ruby's instance_variable_set

I\'m trying to create a set of instances that have different instance names using instance_variable_set to change the instance name and I can\'t seem to get it to[详细]

2023-01-20 16:07 分类：问答
PHP Equivalent to Ruby's @instance_variable?

I was wondering if there is a shorter, better or cleaner way to assign and use class variables in PHP, then through $this->instance_variable ?[详细]

2023-01-20 00:49 分类：问答
dealloc problem with instance variables

A problem happens when I was trying to release one of my instance variables and reassign it a new value.[详细]

2023-01-19 21:39 分类：问答
In rails, where to put a constant (variable?) that changes based on the current date?

I have an app that heavily relies on dates. There is a moderately expensive calculation that is needed to set these dates, based on the current date. As far as each request is concerned, these dates a[详细]

2023-01-18 18:52 分类：问答
objC three20 example ttnavigator menu controller page instance declaration

I tried to understand the three20 ttnavigator example code, and in the MenuController.h file, it is as follows:[详细]

2023-01-18 01:28 分类：问答
Why do people always use reassignment for instance variables in Objective-C (namely iPhone)?

I always see example code where in the viewDidLoad method, instead of saying, for example someInstanceVar = [[Classn开发者_开发知识库ame alloc] init];[详细]

2023-01-18 00:09 分类：问答
My iPhone app crashes after returning from background. Cause: UIImage problem

First off, I want to say this site is AWESOME! and it helped me do lots of stuff while creating my iPhone app.[详细]

2023-01-17 03:25 分类：问答
Undeclared ivars?

I\'ve come across Objective-C code that declares a variable right bel开发者_开发问答ow the @implementation line in a .m file and not in the @interface block of the .h file.It then proceeds to use it l[详细]

2023-01-16 15:57 分类：问答
How to use c array as instance variable in an object in Objective-C?

I want to开发者_运维技巧 declare a c array as an instance variable (e.g. int arr[256]) in the interface block of a Cocoa object. I know that @property doesn\'t support c arrays but how to manually add[详细]

2023-01-15 03:49 分类：问答
Unable to access data in one class from another class

Here is the class which gives me a modal view of the camera @interface ViewController : UIViewController <UIImagePickerControllerDelegate> {[详细]

2023-01-13 07:41 分类：问答