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Re: Loading classes for use with NSClassFromString, how?
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Re: Loading classes for use with NSClassFromString, how?


  • Subject: Re: Loading classes for use with NSClassFromString, how?
  • From: Ken Tozier <email@hidden>
  • Date: Mon, 16 May 2005 10:07:46 -0400

Doh! The class names were misspelled. Thanks for the NSBundle tip.

Ken

On May 16, 2005, at 9:55 AM, Ken Tozier wrote:


On May 16, 2005, at 9:45 AM, Nicko van Someren wrote:


On 16 May 2005, at 14:37, Ken Tozier wrote:



I need to convert some stored strings to classes so that I can run one of their methods. I thought I could use NSClassFromString () like so

[NSClassFromString(@"MyClassName")
        doSomethingCool: 5
        withThisHereThing: @"bobo"];

But apparently the class isn't loaded yet as NSClassFromString() always returns nil. Is there a way to load a specific class at runtime?



Assuming that you are getting the code that implements the necessary code from some bundle you can use the NSBundle method - (Class)classNamed:(NSString *)className This will load the bundle's executable code if it is not already loaded.



The classes in question are all in the main bundle (as far as I know as they weren't placed into a separate bundle unless Xcode did it behind the scenes) so they should be loaded when the app launches, correct? If so, is there another way to create an instance of a class when all you have is it's name in string form?


Ken
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References: 
 >Loading classes for use with NSClassFromString, how? (From: Ken Tozier <email@hidden>)
 >Re: Loading classes for use with NSClassFromString, how? (From: Nicko van Someren <email@hidden>)
 >Re: Loading classes for use with NSClassFromString, how? (From: Ken Tozier <email@hidden>)

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