CODEWITHSUNDEEP
iphoneobjective-cipaduiviewcontrollerdeclaration
Josh Kahane
Josh Kahane

Reputation: 17169

Declare UIViewController without Knowing Subclass?

Lets say I have a UIViewController subclass called ViewControllerOne and another ViewControllerTwo.

I know the at one point that the class I need in another method is either one of these. Is it possible to pass the class in a method, then inside that method which its received at, declare a UIViewController with whichever subclass was passed?

I want to know if its possible without just doing something like, if this = this, declare view one, else declare view two.

Thanks.

Upvotes: 0

Views: 208

Answers (2)

Natan R.
Natan R.

Reputation: 5181

Josh, besides George's answer, if I understand you right, you should be aware about the following method that every NSObjecthas:

- (BOOL)isKindOfClass:(Class)aClass

So, you can check this way

if ([myObject isKindOfClass:[ViewControllerOne class]])
{
     //declare here ViewControllerOne
     ViewControllerOne *myViewControllerOne = myObject;
}
else if ([myObject isKindOfClass:[ViewControllerTwo class]])
{
     //declare here ViewControllerOne
     ViewControllerTwo *myViewControllerOne = myObject;
}

Upvotes: 2

George Green
George Green

Reputation: 4905

Your method could be:

- (void)myMethod:(Class)class {
    UIViewController *controller = [[class alloc] init];
}

Or something to that effect.

Or you could create the controller where you know what the class is and pass it into the method:

UIViewController *controller = [[MYViewController alloc] init];
[self myMethod:controller];

And then if need be inside the method:

- (void)myMethod:(UIViewController *)controller {
    if ([controller isKindOfClass:[MYViewController class]]) {
        // Do something
    } else {
        // Do something else
    }
}

Hope that helps! :)

Upvotes: 4

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