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In xCode 3, I defined private instance variables in a class. When I directly access the private variables in the client codes, why does the compiler just show me a warning, not an error? The code can still run. The warning says this maybe a hard error in the future. What does the "hard error" mean? Thanks. Hard Error means that sometime in the future the compiler will behave the way you expect it to behave (i.e., it won't compile the source file when you directly access an instance variable outside the defined visibility scope). Right now the compiler simply isn't enforcing Objective-C the

This question already has an answer here : Best way of declaring private variables in cocoa (1 answer) Closed 6 years ago . Having ARC enabled for an iOS app, if I want a class to have a private value/object, it should be better to declare this: // .m file @interface MyClass () @property (strong, nonatomic) NSString *name; @end or this?: @implementation MyClass { NSString *name; } What memory management considerations should I have? Thanks! You can use either approach. In the first case you are declaring a private property--which has some benefits. For instance you could expose that private

Since static things loaded at time of class loading,and can be used even before object creation as ClassName.member but if static method is private,so you can only do this thing ClassName.method() inside class which is also accessible by directly method() without appending classname. Hence making a private method static has no significance untill it is not being used in any static method of same class.since only private can not be use in some other static method of same class. But I seen some method those are not being use in any other static stuff and still they are static .For Example

I would like to know what could be reasons to provide a public access method returning a reference instead of making the member public. QPoint has methods int& rx and int& ry that let me directly manipulate the coordinates. I guess the implentation looks similar to this: public: int& rx(){return x;} private: int x; The only idea I had so far is the following: By keeping the member private and "only" providing a reference, the class can still change to use a different data type for its coordinates and while still "somehow" returning a reference to an int. However, this "somehow" would always

Currently I'm building a site that will use a small number of user uploaded videos. These videos are uploaded to the server, then moved on to YouTube via the API v3. The private tag is set, and all videos are uploaded into one central account. My problem is; how can I access and list all these private videos via the API to display on my site? I'm not sure if this is possible. Any feed back would be much appreciated. After looking into it more I found this . After looking through the docs I couldn't find a PHP specific example of how I could do this: getuserUploads. Get the ZF Gdata Library @

I've noticed that a lot of Apple's interfaces use @private before their instance variable declarations. Is there a good design reason for this, and is it something I should do? Private instance variables are used to separate interface from implementation. In Objective-C, since the class declaration must show all of the instance variables, there needs to be a way to prevent subclasses from accessing the ones that are part of the internal implementation. Otherwise, other programmers could write code that depends on those internal variables, which would make it impossible for the class designer

I was playing around with JShell after the Java 9 release, and I tried importing a package I made. As the entire application I'm coding it for will be contained in that package, every class but one (which I haven't coded yet) is package-private. My classpath is correct, but I still can't use any of the types declared in the package in JShell (it throws a "cannot find symbol" error). Do I need to make them public for them to be accessible, or is there some way I can test package-private classes ? Here's the exact code I tried. My current directory is C:\Users\Sylvaenn\OneDrive\Documents