CODEWITHSUNDEEP
iosxcodeuikituidevice
Creator
Creator

Reputation: 166

How to deal with `Use of undeclared identifier 'UIDevice'`

I followed the MD file step by step. But there is still an error in the compilation. What can I do?

In the FaceppClient.m file :

if ([[[UIDevice currentDevice] systemVersion] compare: @"5.0" options: NSNumericSearch ] != NSOrderedAscending)
    _ios50orNewer = true;

Xcode outputs this error :

Use of undeclared identifier 'UIDevice'

I added #import "UIDevice.h" in the file, but Xcode outputs "UIDevice.h not found".

I added the UIKit framework to the Project, but I still have the compilation issue.

What can I do then?

Upvotes: 16

Views: 12660

Answers (2)

Peter Brockmann
Peter Brockmann

Reputation: 3704

And for Swift 5 users who got here, try 

import UIKit

Upvotes: 11

Michaël Azevedo
Michaël Azevedo

Reputation: 3894

Try adding this line at the top of your .m file : 

#import <UIKit/UIKit.h>

Adding the framework to the project is useful, but you also have to include the needed headers in your code.

Upvotes: 40

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