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Editorial Team
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Asked: 2026-06-03T22:42:20+00:00

I am writing an app with four tabs. In the second tab I am

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I am writing an app with four tabs. In the second tab I am storing data in a plist and use this code to set the path:

//get the path to the documents directory (where we will store our plist)
NSString* docDirectory = [self applicationDocumentsDirectory];

//append the path to the documents diretory with our plist name
NSString* destPath = [docDirectory stringByAppendingPathComponent:@"surveyResults.plist"];

It is in it’s own method. Works fine.

In the fourth tab I placed the same code, but I get an error on the [self applicationDocumentsDirectory]: 

No visible @interface for 'FourthViewController' declares the selector 'applicationDocumentsDirectory'

I have it in the viewDidLoad method.

Any reason it works on one tab and not another?

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1 Answer

  1. Editorial Team

    I presume you are using the code from this post:

    How to get URL for application's document directory iPhone

    You just need to ensure that the ViewController for your fourth tab also includes this code snippet also, I expect you’ve just forgotten to put it in.

    Personally I’d place such a method in a helper class, and mark it as a static method so I can call it with, e.g. [MyHandyUtils applicationDocumentsDirectory].

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