how to capture camera with UIImagePickerController

问题:

I'm trying use UIImagePickerController in swift but isn't work...

my ViewController:

class ViewController: UIViewController {

@IBOutlet var imag : UIView = nil
@IBAction func capture(sender : UIButton) {
    println("Button capture")
    if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera)
    {
        var imag = UIImagePickerController()
        imag.delegate = self
        imag.sourceType = UIImagePickerControllerSourceType.Camera;
       imag.mediaTypes = kUTTypeImage
        imag.allowsEditing = false

        self.presentViewController(imag, animated: true, completion: nil)

    }
   }   
}

I have errors in following line of code

imag.delegate = self 
(Type'ViewControlles does confoorm to protocol 'UIImagePickerControllerDelegate')
imagePicker.mediaTypes = kUTTypeImage   
(use of unresolved identifier kUTTypeImage)

I have read that kUTTypeImage cant use in swift.but don't know, i am using bad this functions. Any help?

Thanks!!

回答1:

You should also import MobileCoreServices in the controller:

import MobileCoreServices 

and then put the type inside square brackets like this:

image.mediaTypes = [kUTTypeImage]

Swift 2.0 and Higher

image.mediaTypes = [kUTTypeImage as String]

回答2:

Swift 2.0

In Swift 2.0 (Xcode 7), you need to explicitly cast kUTTypeImage (a CFString) to String:

picker.mediaTypes = [kUTTypeImage as String]

And you still need to import Mobile Core Services for this symbol to be defined:

import MobileCoreServices 

That said, the default value of mediaTypes is [kUTTypeImage] anyway, so you don't need to set it if that's what you want.

回答3:

also you should add UINavigationControllerDelegate to the protocols list of the ViewController and one of the optional delegate functions (if you a planing to get a picture)

This is the working code for your issue:

import UIKit
import MobileCoreServices

class ViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate {

    func imagePickerController(picker: UIImagePickerController!, didFinishPickingImage image: UIImage!, editingInfo: NSDictionary!){
        println("i've got an image");
    }

    @IBAction func capture(sender : UIButton) {
        if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera){
            println("Button capture")

            var imag = UIImagePickerController()
            imag.delegate = self
            imag.sourceType = UIImagePickerControllerSourceType.Camera;
            imag.mediaTypes = [kUTTypeImage]
            imag.allowsEditing = false

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

回答4:

From Your Piece of code its very clear that you are making mistakes at two place one is setting delegate and second is setting Media type imag.mediaTypes = kUTTypeImage

First One:If you look into the delegate definition of UIImagePickerController it requires to confirm two protocol UINavigationControllerDelegate and UIImagePickerControllerDelegate so you have to adopt these two protocols in your viewcontroller class like as

class ViewController: UIViewController,UINavigationControllerDelegate,    UIImagePickerControllerDelegate

second error:If you look into the definition part of mediaTypes it clearly requires array of media types to passed so do like this

imag.mediaTypes = [kUTTypeImage]

Apart from this, I have written a very descent class for the same task

It is easy to understand and integrate.

Here you go

//Declare property 
var imagePicker:ImageVideoPicker?

//Call below line of code properly, it will return an image

self.imagePicker = ImageVideoPicker(frame: self.view.frame, superVC: self) { (capturedImage) -> Void in
        if let captureImage = capturedImage{
        //you did it.....

        }

    }

回答5:

You have to conform to the delegate like this

 class ViewController: UIViewController, UIImagePickerControllerDelegate

Per documentation, by default the media types is set to image so you can go ahead and delete that line since you are only setting it to image.

Do not forget to implement the protocol methods which are outlined in the documentation: documentation

回答6:

Try this

import UIKit
import AVFoundation

class ViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate {
var imagePicker: UIImagePickerController!

@IBOutlet weak var ImageView: UIImageView!



override func viewDidLoad() {
    super.viewDidLoad()


}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

@IBAction func takeImage(sender: AnyObject) {

    imagePicker = UIImagePickerController()
    imagePicker.delegate = self
    imagePicker.sourceType = .Camera
    presentViewController(imagePicker, animated: true, completion: nil)

}


func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
    imagePicker.dismissViewControllerAnimated(true, completion: nil)
    ImageView.image = info[UIImagePickerControllerOriginalImage] as? UIImage
}

}

回答7:

swift 1.2 syntax:

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) {
        let image = info[UIImagePickerControllerOriginalImage]



    }