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.

Pavel Gatilov · Accepted Answer · 2015-03-13 14:49:44Z

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, 2015 at 14:49

Pavel Gatilov

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3 Comments

Jacob King Over a year ago

What a stupid mistake! Haha I wont forget again. Thank you very much for your help!

coolcool1994 Over a year ago

THANK YOU SO MUCH> I DIDNT KNOW I NEEDED UINAVIGATIONCONTROLLERDELEGATE TOO

Sreehari Over a year ago

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

Twitter khuong291 · Accepted Answer · 2016-04-12 07:31:45Z

20

You must add UINavigationControllerDelegate to the class declaration.

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


 // Some thing here

}

edited Apr 12, 2016 at 7:31

Twitter khuong291

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answered Jan 20, 2016 at 1:04

romdav

2412 silver badges4 bronze badges

1 Comment

Jacob King Over a year ago

Thank you for providing an example in swift.

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