Create object from NSString of class name in Objective-C

Question

I was wondering if i could create a object of some class if i have the name of the class in a NSString. I know this is possible in other languages like ActionScript, C# and PHP...

Something like this:

NSString *className = @"AwesomeViewController";
UIViewController *object = [[className alloc] initWithNibName:className bundle:nil];

Pang · Accepted Answer · 2018-02-15 07:41:37Z

105

Classes are first-class objects in Objective-C too. You can get the class object from an NSString with the NSClassFromString function.

[[NSClassFromString(className) alloc] init...]

edited Feb 15, 2018 at 7:41

Pang

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answered Jun 1, 2010 at 17:18

kennytm

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4 Comments

neoneye Over a year ago

and the other way around is: NSLog(@"%@", NSStringFromClass([obj class]));

zszen Over a year ago

Is it a weak response?

huggie Over a year ago

Is there a way to declare a variable using NSString too? I mean if in original poster's post, I don't want to write UIViewController in UIViewController *object but declare it base on NSString. Would that be possible?

Flores Robles Over a year ago

You can just use id @huggie. Since the compiler won't know the class, you will get the same result.

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