Swift - UIImagePickerController-comment l'utiliser?

j'essaie de comprendre comment ça marche, mais c'est assez dur pour moi. =) J'ai 1 vue, il y a un bouton et une petite zone D'ImageView pour l'aperçu. Le bouton déclenche imagepickercontroller, et L'uivi affichera l'image sélectionnée. Il n'y a pas d'erreur, mais L'image ne s'affiche pas dans la zone UIImageView. 

var imagePicker = UIImagePickerController()
@IBOutlet var imagePreview : UIImageView

@IBAction func AddImageButton(sender : AnyObject) {
    imagePicker.modalPresentationStyle = UIModalPresentationStyle.CurrentContext
    imagePicker.delegate = self
    self.presentModalViewController(imagePicker, animated: true)

}
func imagePickerController(picker: UIImagePickerController!, didFinishPickingMediaWithInfo info:NSDictionary!) {
    var tempImage:UIImage = info[UIImagePickerControllerOriginalImage] as UIImage
    imagePreview.image  = tempImage

    self.dismissModalViewControllerAnimated(true)

}

func imagePickerControllerDidCancel(picker: UIImagePickerController!) {

    self.dismissModalViewControllerAnimated(true)
}
28
demandé sur user3806731 2014-07-08 11:07:54

5 réponses

Vous êtes saisissant UIImageUIImage avec la touche UIImagePickerControllerOriginalImageeditingInfo dictionnaire:

let tempImage = editingInfo[UIImagePickerControllerOriginalImage] as! UIImage
32
répondu Jesper 2018-06-29 07:18:09 
import MobileCoreServices

class SecondViewController: UIViewController,UINavigationControllerDelegate, UIImagePickerControllerDelegate {

   @IBOutlet var img:UIImageView!=nil

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

   override func didReceiveMemoryWarning() 
   {
       super.didReceiveMemoryWarning()

   }

   @IBAction func buttonTapped(AnyObject)
   {
     if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.PhotoLibrary){
            println("Button capture")
            var imag = UIImagePickerController()
            imag.delegate = self
            imag.sourceType = UIImagePickerControllerSourceType.PhotoLibrary;
            //imag.mediaTypes = [kUTTypeImage];
            imag.allowsEditing = false
            self.presentViewController(imag, animated: true, completion: nil)
        }
   }

   func imagePickerController(picker: UIImagePickerController!, didFinishPickingImage image: UIImage!, editingInfo: NSDictionary!) {
        let selectedImage : UIImage = image
       //var tempImage:UIImage = editingInfo[UIImagePickerControllerOriginalImage] as UIImage
        img.image=selectedImage
        self.dismissViewControllerAnimated(true, completion: nil)    
   }
 }
22
répondu Varsha Vijayvargiya 2015-04-21 17:04:52

Détails

xCode 8.3, swift 3.1

Code

ImagePicker

import AVFoundation
import Photos

class ImagePicker: NSObject {

    var controller = UIImagePickerController()
    var selectedImage: UIImage?
    var delegate: ImagePickerDelegate? = nil

    override init() {
        super.init()
        controller.sourceType = .photoLibrary
        controller.delegate = self
    }

    func dismiss() {
        controller.dismiss(animated: true, completion: nil)
    }
}

extension ImagePicker {

    func cameraAsscessRequest() {
        if AVCaptureDevice.authorizationStatus(forMediaType: AVMediaTypeVideo) ==  AVAuthorizationStatus.authorized {
            delegate?.imagePickerDelegate(canUseCamera: true, delegatedForm: self)
        } else {
            AVCaptureDevice.requestAccess(forMediaType: AVMediaTypeVideo) { granted -> Void in
                self.delegate?.imagePickerDelegate(canUseCamera: granted, delegatedForm: self)
            }
        }
    }

    func galleryAsscessRequest() {
        PHPhotoLibrary.requestAuthorization { [weak self] result in
            if let _self = self {
                var access = false
                if result == .authorized {
                    access = true
                }
                _self.delegate?.imagePickerDelegate(canUseGallery: access, delegatedForm: _self)
            }
        }
    }
}

extension ImagePicker: UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {

        let imageName = "img_\(Date().timeIntervalSince1970)"

        if let image = info[UIImagePickerControllerEditedImage] as? UIImage {
            delegate?.imagePickerDelegate(didSelect: image, imageName: imageName,  delegatedForm: self)
        }
        else if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
            delegate?.imagePickerDelegate(didSelect: image, imageName: imageName, delegatedForm: self)
        } else{
            print("Something went wrong")
        }
    }

    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        delegate?.imagePickerDelegate(didCancel: self)
    }

}

ImagePickerDelegate

import UIKit

protocol ImagePickerDelegate {
    func imagePickerDelegate(canUseCamera accessIsAllowed:Bool, delegatedForm: ImagePicker)
    func imagePickerDelegate(canUseGallery accessIsAllowed:Bool, delegatedForm: ImagePicker)
    func imagePickerDelegate(didSelect image: UIImage, imageName:String, delegatedForm: ImagePicker)
    func imagePickerDelegate(didCancel delegatedForm: ImagePicker)
}

extension ImagePickerDelegate {
    func imagePickerDelegate(canUseCamera accessIsAllowed:Bool, delegatedForm: ImagePicker) {}
    func imagePickerDelegate(canUseGallery accessIsAllowed:Bool, delegatedForm: ImagePicker) {}
}

Utilisation

Info.plist

ajouter:

 <key>NSPhotoLibraryUsageDescription</key>
 <string>bla-bla-bla</string>
 <key>NSCameraUsageDescription</key>
 <string>bla-bla-bla</string>

ViewController

 import UIKit

class ViewController: UIViewController {

    fileprivate var imagePicker = ImagePicker()

    @IBOutlet weak var imageView: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()
        imagePicker.delegate = self
    }

    fileprivate func presentImagePicker(sourceType: UIImagePickerControllerSourceType) {
        imagePicker.controller.sourceType = sourceType
        DispatchQueue.main.async {
            self.present(self.imagePicker.controller, animated: true, completion: nil)
        }
    }

    @IBAction func presentPickerAndRequestPermission(_ sender: UIButton) {
        presentImagePicker(sourceType: .savedPhotosAlbum)
    }

    @IBAction func requestPermissionAndPresentPicker(_ sender: UIButton) {
        imagePicker.galleryAsscessRequest()
    }

    @IBAction func cameraButtonTapped(_ sender: Any) {
        imagePicker.cameraAsscessRequest()
    }

}

extension ViewController: ImagePickerDelegate {

    func imagePickerDelegate(didSelect image: UIImage, imageName:String, delegatedForm: ImagePicker) {
        imageView.image = image
        imagePicker.dismiss()
    }

    func imagePickerDelegate(didCancel delegatedForm: ImagePicker) {
        imagePicker.dismiss()
    }

    func imagePickerDelegate(canUseGallery accessIsAllowed: Bool, delegatedForm: ImagePicker) {
        if accessIsAllowed {
            presentImagePicker(sourceType: .photoLibrary)
        }
    }

    func imagePickerDelegate(canUseCamera accessIsAllowed: Bool, delegatedForm: ImagePicker) {
        if accessIsAllowed {
            // works only on real device (crash on simulator)
            presentImagePicker(sourceType: .camera)
        }
    }
}

Main.storyboard

    <?xml version="1.0" encoding="UTF-8"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="12118" systemVersion="16E195" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="8h3-th-UId">
    <device id="retina4_7" orientation="portrait">
        <adaptation id="fullscreen"/>
    </device>
    <dependencies>
        <deployment identifier="iOS"/>
        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="12086"/>
        <capability name="Constraints to layout margins" minToolsVersion="6.0"/>
        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
    </dependencies>
    <scenes>
        <!--View Controller-->
        <scene sceneID="tne-QT-ifu">
            <objects>
                <viewController id="BYZ-38-t0r" customClass="ViewController" customModule="stackoverflow_43425753" customModuleProvider="target" sceneMemberID="viewController">
                    <layoutGuides>
                        <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
                        <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
                    </layoutGuides>
                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                        <subviews>
                            <imageView clipsSubviews="YES" userInteractionEnabled="NO" contentMode="scaleAspectFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" translatesAutoresizingMaskIntoConstraints="NO" id="lOV-da-uaY">
                                <rect key="frame" x="67" y="269" width="240" height="128"/>
                                <color key="backgroundColor" white="0.66666666666666663" alpha="1" colorSpace="calibratedWhite"/>
                                <constraints>
                                    <constraint firstAttribute="height" constant="128" id="iv7-J9-AJp"/>
                                    <constraint firstAttribute="width" constant="240" id="pOJ-T3-hG6"/>
                                </constraints>
                            </imageView>
                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="f1v-ZZ-Ymw">
                                <rect key="frame" x="16" y="231" width="343" height="30"/>
                                <state key="normal" title="Request permission before present picker"/>
                                <connections>
                                    <action selector="requestPermissionAndPresentPicker:" destination="BYZ-38-t0r" eventType="touchUpInside" id="lyc-yI-9TS"/>
                                </connections>
                            </button>
                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="41F-AZ-10t">
                                <rect key="frame" x="16" y="193" width="343" height="30"/>
                                <state key="normal" title="Present picker before request permission"/>
                                <connections>
                                    <action selector="presentPickerAndRequestPermission:" destination="BYZ-38-t0r" eventType="touchUpInside" id="Wfy-u3-9Xi"/>
                                </connections>
                            </button>
                        </subviews>
                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                        <constraints>
                            <constraint firstItem="f1v-ZZ-Ymw" firstAttribute="top" secondItem="41F-AZ-10t" secondAttribute="bottom" constant="8" symbolic="YES" id="H79-n9-dbA"/>
                            <constraint firstItem="lOV-da-uaY" firstAttribute="top" secondItem="f1v-ZZ-Ymw" secondAttribute="bottom" constant="8" symbolic="YES" id="QEf-Il-7CA"/>
                            <constraint firstItem="41F-AZ-10t" firstAttribute="leading" secondItem="f1v-ZZ-Ymw" secondAttribute="leading" id="T9O-9X-o17"/>
                            <constraint firstItem="f1v-ZZ-Ymw" firstAttribute="centerX" secondItem="lOV-da-uaY" secondAttribute="centerX" id="YEX-d4-Ktl"/>
                            <constraint firstItem="41F-AZ-10t" firstAttribute="trailing" secondItem="f1v-ZZ-Ymw" secondAttribute="trailing" id="b0d-Z3-EPR"/>
                            <constraint firstItem="lOV-da-uaY" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" id="fjW-qF-w9E"/>
                            <constraint firstItem="lOV-da-uaY" firstAttribute="centerY" secondItem="8bC-Xf-vdC" secondAttribute="centerY" id="paK-zP-Zny"/>
                            <constraint firstItem="41F-AZ-10t" firstAttribute="leading" secondItem="8bC-Xf-vdC" secondAttribute="leadingMargin" id="wOA-e7-6ND"/>
                        </constraints>
                    </view>
                    <navigationItem key="navigationItem" id="O38-0b-A9f">
                        <barButtonItem key="leftBarButtonItem" systemItem="camera" id="T6B-k6-KJ9">
                            <connections>
                                <action selector="cameraButtonTapped:" destination="BYZ-38-t0r" id="OBY-pO-8HL"/>
                            </connections>
                        </barButtonItem>
                    </navigationItem>
                    <connections>
                        <outlet property="imageView" destination="lOV-da-uaY" id="EYi-qU-noP"/>
                    </connections>
                </viewController>
                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
            </objects>
            <point key="canvasLocation" x="1013.6" y="-579.76011994002999"/>
        </scene>
        <!--Navigation Controller-->
        <scene sceneID="BZr-BH-sMY">
            <objects>
                <navigationController automaticallyAdjustsScrollViewInsets="NO" id="8h3-th-UId" sceneMemberID="viewController">
                    <toolbarItems/>
                    <navigationBar key="navigationBar" contentMode="scaleToFill" id="J5d-TE-5r7">
                        <rect key="frame" x="0.0" y="0.0" width="375" height="44"/>
                        <autoresizingMask key="autoresizingMask"/>
                    </navigationBar>
                    <nil name="viewControllers"/>
                    <connections>
                        <segue destination="BYZ-38-t0r" kind="relationship" relationship="rootViewController" id="UWM-bm-ZNP"/>
                    </connections>
                </navigationController>
                <placeholder placeholderIdentifier="IBFirstResponder" id="Hzd-Nh-WhC" userLabel="First Responder" sceneMemberID="firstResponder"/>
            </objects>
            <point key="canvasLocation" x="125.59999999999999" y="-578.86056971514245"/>
        </scene>
    </scenes>
</document>

Résultats

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13
répondu Vasily Bodnarchuk 2017-04-15 13:36:36

essaye ceci:

func imagePickerController(picker: UIImagePickerController!, didFinishPickingMediaWithInfo info:NSDictionary!) {
    let tempImage = info[UIImagePickerControllerOriginalImage] as! UIImage
    imagePreview.image  = tempImage

ou vous pouvez également utiliser ? à la place de !.

3
répondu Gaurav 2016-12-13 18:59:29

Depuis swift 4.2 et xcode 10func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) changer un peu.

à l'en-tête de fonction, la section infoKey change de

didFinishPickingMediaWithInfo info: [String : Any]

didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]

pour obtenir l'image originale vous devez maintenant appeler:

let image = info[UIImagePickerController.InfoKey.originalImage] as? UIImage ou

let image = info[.originalImage] as? UIImage

trouver d'autres informations ici (editedImage, imageURL et plus...)

0
répondu andre_hold 2018-09-18 07:59:28