如何分别获取基于摄像头和基于媒体的图像/视频，以在iOS设备的集合视图中显示

Question

我正在开发一个聊天应用程序。在我的应用程序中，当我点击attachement按钮时，应该会出现两个选项。

1)设备摄像头采集到的图像/视频(当时没有采集到图像。获取存储在设备中的摄像头拍摄的图像)

2)从网络或其他媒体下载的图像/视频

有没有办法根据上面给定的条件，最好使用assets库来获取图像/视频

Answer 1

class YourController :  UIViewController,UINavigationControllerDelegate, UIImagePickerControllerDelegate, UIActionSheetDelegate,UIPopoverPresentationControllerDelegate
{    

    override func viewDidLoad() {
        super.viewDidLoad()
    }
    func takePhotoByGalleryOrCamera(){

        //MAark Take picture from gallery and camera 
        //image picker controller to use take image 
        // uialert controller to make action

        let imageController = UIImagePickerController()
        imageController.editing = false
        imageController.delegate = self;

        let alert = UIAlertController(title: "", message: "Profile Image Selctor", preferredStyle: UIAlertControllerStyle.ActionSheet)


        let libButton = UIAlertAction(title: "Select photo from library", style: UIAlertActionStyle.Default) { (alert) -> Void in
            imageController.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
            self.presentViewController(imageController, animated: true, completion: nil)
        }


        if(UIImagePickerController .isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera)){
            let cameraButton = UIAlertAction(title: "Take a picture", style: UIAlertActionStyle.Default) { (alert) -> Void in
                print("Take Photo")
                imageController.sourceType = UIImagePickerControllerSourceType.Camera
                self.presentViewController(imageController, animated: true, completion: nil)

            }
            alert.addAction(cameraButton)
        } else {
            print("Camera not available")

        }
        let cancelButton = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel) { (alert) -> Void in
            print("Cancel Pressed")
        }

        alert.addAction(libButton)
        alert.addAction(cancelButton)

        if UIDevice.currentDevice().userInterfaceIdiom == UIUserInterfaceIdiom.Pad {

            alert.modalPresentationStyle = UIModalPresentationStyle.Popover;
            //        alert.transitioningDelegate = self;
            alert.popoverPresentationController!.sourceView = self.view;
            alert.popoverPresentationController!.sourceRect = CGRectMake(0, SizeUtil.screenHeight(), SizeUtil.screenWidth(), SizeUtil.screenHeight()*0.4)
            alert.popoverPresentationController!.delegate = self;

            self.presentViewController(alert, animated: true, completion: nil)
        } else {
           self.presentViewController(alert, animated: true, completion: nil)
        }



    }

    func adaptivePresentationStyleForPresentationController(controller: UIPresentationController) -> UIModalPresentationStyle {

        return UIModalPresentationStyle.Popover
    }


    //image picker Delegate
    func imagePickerController(picker: UIImagePickerController!, didFinishPickingImage image: UIImage!, editingInfo: [NSObject : AnyObject]!) {
        self.dismissViewControllerAnimated(true, completion: nil)

        let header = profileTableView.headerViewForSection(0) as! ProfileHeaderView
        header.btnImage.setImage(image, forState: UIControlState.Normal)
        _userProfileImage = image

    }
}