Setting delegate for UIImagePicker returns error

Question

Having a problem in some swift code I had written for an OCR translation app. The code snippet is below:

@IBAction func btnOCR(sender: AnyObject) {

    var languageAlert = UIAlertController(title: "For Your Information...", message: "The OCR feature currently only supports English & French.", preferredStyle: .Alert)
    languageAlert.addAction(UIAlertAction(title: "Okay", style: .Default, handler: { action in

        var image = UIImagePickerController()
        image.sourceType = UIImagePickerControllerSourceType.Camera
        image.allowsEditing = false
        image.delegate = self
        presentViewController(image, animated: true, completion: nil)

    }))
    self.presentViewController(languageAlert, animated: true, completion: nil)
}

The image.delegate = self line returns the error: Cannot assign a value of type viewcontroller to uiimagepickerdelegate.

I have set the delegate in the class definition, this can be seen below...

class ViewController: UIViewController, UITextFieldDelegate, UIPickerViewDelegate, UIPickerViewDataSource, UIImagePickerControllerDelegate {    }

All and any help would be appreciated, thanks in advance.

score 86 · Accepted Answer · answered Mar 13 '15 at 14:49

86

You forgot about UINavigationControllerDelegate in your ViewController class defenition.

The image picker’s delegate object.

Declaration

unowned(unsafe) var delegate: protocol<UIImagePickerControllerDelegate, UINavigationControllerDelegate>?

answered Mar 13 '15 at 14:49

Pavel Gatilov

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What a stupid mistake! Haha I wont forget again. Thank you very much for your help! – Jacob King Mar 13 '15 at 15:01
1

THANK YOU SO MUCH> I DIDNT KNOW I NEEDED UINAVIGATIONCONTROLLERDELEGATE TOO – coolcool1994 Jul 29 '16 at 20:06
Newbie to IOS. If I may ask. In the UI controller even if definition mentions about UINavigationControllerDelegate. But without any specific implementation, only by declaring UINavigationControllerDelegate does it really help? How compiler takes into consideration without implementing anything related to UINavigationControllerDelegate. I am totally new to IOS swift. Would appreciate if someone could explain – Sreehari Mar 04 '19 at 16:59

score 20 · Answer 2 · edited Apr 12 '16 at 07:31

20

You must add UINavigationControllerDelegate to the class declaration.

class ViewController: UIViewController, UITextFieldDelegate, UIPickerViewDelegate, UIPickerViewDataSource, UIImagePickerControllerDelegate, UINavigationControllerDelegate {    


 // Some thing here

}

edited Apr 12 '16 at 07:31

Twitter khuong291

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answered Jan 20 '16 at 01:04

romdav

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Thank you for providing an example in swift. – Jacob King Mar 11 '16 at 13:48

Setting delegate for UIImagePicker returns error

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