如何允许用户使用 Swift 选择图像？
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【中文标题】如何允许用户使用 Swift 选择图像？【英文标题】：How to allow user to pick the image with Swift? 【发布时间】：2014-10-20 00:43:41 【问题描述】：我正在使用 Swift 编写我的第一个 ios 应用程序（仅限 iPhone）。主应用程序视图应允许用户从照片库中选择图像。
我找到了以下 ViewController.swift 的示例代码：
class ViewController: UIImagePickerController, UINavigationControllerDelegate, UIImagePickerControllerDelegate
override func viewDidLoad()
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
override func didReceiveMemoryWarning()
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
func tableView(tableView: UITableView!, didSelectRowAtIndexPath indexPath: NSIndexPath!)
var imagePickerController = UIImagePickerController()
imagePickerController.delegate = self
imagePickerController.sourceType = UIImagePickerControllerSourceType.SavedPhotosAlbum
imagePickerController.allowsEditing = true
self.presentViewController(imagePickerController, animated: true, completion: imageP in
)
func imagePickerController(picker: UIImagePickerController!, didFinishPickingImage image: UIImage!, editingInfo: NSDictionary!)
let selectedImage : UIImage = image
println(selectedImage)
并具有以下视图控制器场景 -
View Controller
- Top Layout Guide
- Bottom Layout Guide
- View
- Image View
First Responder
Exit
但是当我启动应用程序时，只显示黑屏。我做错了什么？ 我发现的另一个 sample code 在 Objective-C 中，这对我没有帮助。
【问题讨论】：
一个问题可能是 didSselectRowAtIndePath 是 UITableViewDelegate 的委托调用。根据您的场景布局和代码，这里没有使用 tableview，并且您的 ViewController 不是 UITableViewDelegate。也许 start 将是一个可以工作的空白项目，并添加一个按钮并从按钮按下触发您的代码。 @LA_ 我不明白为什么这里会涉及到tableView函数？ 它工作正常并经过良好测试只需转到：***.com/questions/41717115/… 请看这个，theswiftdev.com/… 【参考方案1】：如果您只想让用户使用 UIImagePickerController 选择图像，请使用以下代码：
import UIKit
class ViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate
@IBOutlet var imageView: UIImageView!
@IBOutlet var chooseBuuton: UIButton!
var imagePicker = UIImagePickerController()
@IBAction func btnClicked()
if UIImagePickerController.isSourceTypeAvailable(.savedPhotosAlbum)
print("Button capture")
imagePicker.delegate = self
imagePicker.sourceType = .savedPhotosAlbum
imagePicker.allowsEditing = false
present(imagePicker, animated: true, completion: nil)
func imagePickerController(picker: UIImagePickerController!, didFinishPickingImage image: UIImage!, editingInfo: NSDictionary!)
self.dismiss(animated: true, completion: () -> Void in
)
imageView.image = image
【讨论】：
如果我不想让用户按下按钮来选择图像怎么办？ 从 func 中删除 @IBaction 并在您想在 viewDidLoad 中说或任何时候调用它时调用 func 谢谢。它说Attempt to present <UIImagePickerController: 0x7fdb84029800> on <MyApp.ViewController: 0x7fdb838360a0> whose view is not in the window hierarchy!。我应该在场景中添加一些东西吗？
我赞成 bc 这真的很有帮助。只需将 NSDictionary 更改为 [NSObject: AnyObject] 并且效果很好！
@DekelMaman 在审核队列中有一个建议的编辑使其成为 Swift3，但 it was of poor quality，所以我拒绝了它并进行了适当的编辑以避免更多建议【参考方案2】：
swift 4 的完整复制粘贴工作图像选择器基于 @user3182143 答案：
import Foundation
import UIKit
class ImagePickerManager: NSObject, UIImagePickerControllerDelegate, UINavigationControllerDelegate
var picker = UIImagePickerController();
var alert = UIAlertController(title: "Choose Image", message: nil, preferredStyle: .actionSheet)
var viewController: UIViewController?
var pickImageCallback : ((UIImage) -> ())?;
override init()
super.init()
let cameraAction = UIAlertAction(title: "Camera", style: .default)
UIAlertAction in
self.openCamera()
let galleryAction = UIAlertAction(title: "Gallery", style: .default)
UIAlertAction in
self.openGallery()
let cancelAction = UIAlertAction(title: "Cancel", style: .cancel)
UIAlertAction in
// Add the actions
picker.delegate = self
alert.addAction(cameraAction)
alert.addAction(galleryAction)
alert.addAction(cancelAction)
func pickImage(_ viewController: UIViewController, _ callback: @escaping ((UIImage) -> ()))
pickImageCallback = callback;
self.viewController = viewController;
alert.popoverPresentationController?.sourceView = self.viewController!.view
viewController.present(alert, animated: true, completion: nil)
func openCamera()
alert.dismiss(animated: true, completion: nil)
if(UIImagePickerController .isSourceTypeAvailable(.camera))
picker.sourceType = .camera
self.viewController!.present(picker, animated: true, completion: nil)
else
let alertController: UIAlertController =
let controller = UIAlertController(title: "Warning", message: "You don't have camera", preferredStyle: .alert)
let action = UIAlertAction(title: "OK", style: .default)
controller.addAction(action)
return controller
()
viewController?.present(alertController, animated: true)
func openGallery()
alert.dismiss(animated: true, completion: nil)
picker.sourceType = .photoLibrary
self.viewController!.present(picker, animated: true, completion: nil)
func imagePickerControllerDidCancel(_ picker: UIImagePickerController)
picker.dismiss(animated: true, completion: nil)
//for swift below 4.2
//func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any])
// picker.dismiss(animated: true, completion: nil)
// let image = info[UIImagePickerControllerOriginalImage] as! UIImage
// pickImageCallback?(image)
//
// For Swift 4.2+
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any])
picker.dismiss(animated: true, completion: nil)
guard let image = info[.originalImage] as? UIImage else
fatalError("Expected a dictionary containing an image, but was provided the following: \(info)")
pickImageCallback?(image)
@objc func imagePickerController(_ picker: UIImagePickerController, pickedImage: UIImage?)
像这样从您的视图控制器调用它：
ImagePickerManager().pickImage(self) image in
//here is the image
另外不要忘记在您的info.plist 中包含以下键：
<key>NSCameraUsageDescription</key>
<string>This app requires access to the camera.</string>
<key>NSPhotoLibraryUsageDescription</key>
<string>This app requires access to the photo library.</string>
【讨论】：
必须用这个替换 funcimagePickerController 才能使其工作。谢谢！ func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) let image = info[UIImagePickerController.InfoKey.originalImage] as! UIImage pickImageCallback?(image) picker.dismiss(animated: true, completion: nil)
'NSInternalInconsistencyException', reason: 'UIAlertController can only have one action with a style of UIAlertActionStyleCancel' 我在上面的代码中遇到了这个错误。
我添加了以下代码来解决这个问题： if alert.actions.count > 0 // 取消后再次调用警报 self.present(alert, animated: true, completion: nil) else alert.addAction(cameraAction) alert.addAction(galleryAction) alert.addAction(cancelAction) self.present(alert, animated: true, completion: nil)
@Ing.Ron addActions 只需要设置一次，因此它们应该放在 init 方法中——我已经更新了代码。如果您对此有任何问题，请告诉我
@vir us：非常感谢您的快速响应！就我而言，我将您的 init() 代码放在 viewDidLoad() 中，这对我来说很好！【参考方案3】：
对于 Swift 3：
首先，您需要在 info.plist 中添加以下键：
<key>NSPhotoLibraryUsageDescription</key>
<string>This app requires access to the photo library.</string>
您的视图控制器需要符合以下协议：
UIImagePickerControllerDelegate，UINavigationControllerDelegate：
class ImagePickerViewController: UIViewController,UIImagePickerControllerDelegate, UINavigationControllerDelegate
您需要声明将用于绑定返回/选定图像的 UIImage：
@IBOutlet weak var myImageView: UIImageView!
@IBoutlet weak var upLoadImageBtn:UIImage!
let imagePicker = UIImagePickerController()
将 pickerImage 委托设置为您的 ViewController：
imagePicker.delegate = self
对于上传按钮，您需要链接到以下图片才能触发操作并显示图片选择器：
@IBAction func upLoadImageBtnPressed(_ sender: AnyObject)
imagePicker.allowsEditing = false
imagePicker.sourceType = .photoLibrary
/*
The sourceType property wants a value of the enum named UIImagePickerControllerSourceType, which gives 3 options:
UIImagePickerControllerSourceType.PhotoLibrary
UIImagePickerControllerSourceType.Camera
UIImagePickerControllerSourceType.SavedPhotosAlbum
*/
present(imagePicker, animated: true, completion: nil)
您的视图控制器需要为图像选择器委托实现委托方法：
// MARK: - ImagePicker Delegate
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any])
if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage
myImageView.contentMode = .scaleAspectFit
myImageView.image = pickedImage
/*
Swift Dictionary named “info”.
We have to unpack it from there with a key asking for what media information we want.
We just want the image, so that is what we ask for. For reference, the available options are:
UIImagePickerControllerMediaType
UIImagePickerControllerOriginalImage
UIImagePickerControllerEditedImage
UIImagePickerControllerCropRect
UIImagePickerControllerMediaURL
UIImagePickerControllerReferenceURL
UIImagePickerControllerMediaMetadata
*/
dismiss(animated: true, completion: nil)
func imagePickerControllerDidCancel(_ picker: UIImagePickerController)
dismiss(animated: true, completion:nil)
【讨论】：
【参考方案4】：我会给你最好的理解编码来挑选图像，参考这个
func tableView(tableView: UITableView!, didSelectRowAtIndexPath indexPath: NSIndexPath!)
var alert:UIAlertController=UIAlertController(title: "Choose Image", message: nil, preferredStyle: UIAlertControllerStyle.ActionSheet)
var cameraAction = UIAlertAction(title: "Camera", style: UIAlertActionStyle.Default)
UIAlertAction in
self.openCamera()
var gallaryAction = UIAlertAction(title: "Gallary", style: UIAlertActionStyle.Default)
UIAlertAction in
self.openGallary()
var cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel)
UIAlertAction in
// Add the actions
picker?.delegate = self
alert.addAction(cameraAction)
alert.addAction(gallaryAction)
alert.addAction(cancelAction)
self.presentViewController(alert, animated: true, completion: nil)
func openCamera()
if(UIImagePickerController .isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera))
picker!.sourceType = UIImagePickerControllerSourceType.Camera
self .presentViewController(picker!, animated: true, completion: nil)
else
let alertWarning = UIAlertView(title:"Warning", message: "You don't have camera", delegate:nil, cancelButtonTitle:"OK", otherButtonTitles:"")
alertWarning.show()
func openGallary()
picker!.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
self.presentViewController(picker!, animated: true, completion: nil)
//PickerView Delegate Methods
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject])
picker .dismissViewControllerAnimated(true, completion: nil)
imageView.image=info[UIImagePickerControllerOriginalImage] as? UIImage
func imagePickerControllerDidCancel(picker: UIImagePickerController)
println("picker cancel.")
祝你有美好的一天:-)
【讨论】：
【参考方案5】：在 Swift 5 中你必须这样做
class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate
@IBOutlet var imageView: UIImageView!
var imagePicker = UIImagePickerController()
override func viewDidLoad()
super.viewDidLoad()
// Do any additional setup after loading the view.
@IBAction func setPicture(_ sender: Any)
if UIImagePickerController.isSourceTypeAvailable(.photoLibrary)
imagePicker.delegate = self
imagePicker.sourceType = .photoLibrary
imagePicker.allowsEditing = false
present(imagePicker, animated: true, completion: nil)
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any])
picker.dismiss(animated: true, completion: nil)
if let image = info[UIImagePickerController.InfoKey.originalImage] as? UIImage
imageView.image = image
【讨论】：
【参考方案6】： @IBAction func chooseProfilePicBtnClicked(sender: AnyObject)
let alert:UIAlertController=UIAlertController(title: "Choose Image", message: nil, preferredStyle: UIAlertControllerStyle.ActionSheet)
let cameraAction = UIAlertAction(title: "Camera", style: UIAlertActionStyle.Default)
UIAlertAction in
self.openCamera()
let gallaryAction = UIAlertAction(title: "Gallary", style: UIAlertActionStyle.Default)
UIAlertAction in
self.openGallary()
let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel)
UIAlertAction in
// Add the actions
picker.delegate = self
alert.addAction(cameraAction)
alert.addAction(gallaryAction)
alert.addAction(cancelAction)
self.presentViewController(alert, animated: true, completion: nil)
func openCamera()
if(UIImagePickerController .isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera))
picker.sourceType = UIImagePickerControllerSourceType.Camera
self .presentViewController(picker, animated: true, completion: nil)
else
let alert = UIAlertView()
alert.title = "Warning"
alert.message = "You don't have camera"
alert.addButtonWithTitle("OK")
alert.show()
func openGallary()
picker.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
self.presentViewController(picker, animated: true, completion: nil)
//MARK:UIImagePickerControllerDelegate
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])
picker .dismissViewControllerAnimated(true, completion: nil)
imageViewRef.image=info[UIImagePickerControllerOriginalImage] as? UIImage
func imagePickerControllerDidCancel(picker: UIImagePickerController)
print("picker cancel.")
【讨论】：
【参考方案7】：XCODE 10.1 / SWIFT 4.2：
添加所需权限（其他提及）
将此类添加到您的视图中：
import UIKit
import Photos
import Foundation
class UploadImageViewController: UIViewController, UIImagePickerControllerDelegate , UINavigationControllerDelegate
@IBOutlet weak var imgView: UIImageView!
let imagePicker = UIImagePickerController()
override func viewDidLoad()
super.viewDidLoad()
checkPermission()
imagePicker.delegate = self
imagePicker.allowsEditing = false
imagePicker.sourceType = .photoLibrary
@IBAction func btnSetProfileImageClickedCamera(_ sender: UIButton)
@IBAction func btnSetProfileImageClickedFromGallery(_ sender: UIButton)
self.selectPhotoFromGallery()
func selectPhotoFromGallery()
self.present(imagePicker, animated: true, completion: nil)
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any])
if let pickedImage = info[UIImagePickerController.InfoKey.originalImage] as? UIImage
self.imgView.contentMode = .scaleAspectFit
self.imgView.image = pickedImage
dismiss(animated: true, completion: nil)
func imagePickerControllerDidCancel(_ picker: UIImagePickerController)
print("cancel is clicked")
func checkPermission()
let photoAuthorizationStatus = phphotoLibrary.authorizationStatus()
switch photoAuthorizationStatus
case .authorized:
print("Access is granted by user")
case .notDetermined:
PHPhotoLibrary.requestAuthorization(
(newStatus) in
print("status is \(newStatus)")
if newStatus == PHAuthorizationStatus.authorized
/* do stuff here */
print("success")
)
print("It is not determined until now")
case .restricted:
// same same
print("User do not have access to photo album.")
case .denied:
// same same
print("User has denied the permission.")
【讨论】：
【参考方案8】：做这些东西来显示照片库图像快速编码：
var pkcrviewUI = UIImagePickerController()
if UIImagePickerController .isSourceTypeAvailable(UIImagePickerControllerSourceType.PhotoLibrary)
pkcrviewUI.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
pkcrviewUI.allowsEditing = true
pkcrviewUI.delegate = self
[self .presentViewController(pkcrviewUI, animated: true , completion: nil)]
【讨论】：
【参考方案9】：我知道这个问题已经有一年的历史了，但这里有一些非常简单的代码（主要来自 this tutorial）对我来说效果很好：
import UIKit
class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate
@IBOutlet weak var imageView: UIImageView!
var imagePicker = UIImagePickerController()
override func viewDidLoad()
super.viewDidLoad()
self.imagePicker.delegate = self
@IBAction func loadImageButtonTapped(sender: AnyObject)
print("hey!")
self.imagePicker.allowsEditing = false
self.imagePicker.sourceType = .SavedPhotosAlbum
self.presentViewController(imagePicker, animated: true, completion: nil)
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject])
if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage
self.imageView.contentMode = .ScaleAspectFit
self.imageView.image = pickedImage
dismissViewControllerAnimated(true, completion: nil)
func imagePickerControllerDidCancel(picker: UIImagePickerController)
self.imagePicker = UIImagePickerController()
dismissViewControllerAnimated(true, completion: nil)
【讨论】：
可以找到比我引用的更深入的教程here【参考方案10】：对于 Swift 4 这段代码对我有用！
import UIKit
class ViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate
@IBOutlet var imageView: UIImageView!
@IBOutlet var chooseBuuton: UIButton!
var imagePicker = UIImagePickerController()
override func viewDidLoad()
super.viewDidLoad()
imagePicker.delegate = self
@IBAction func btnClicked()
if UIImagePickerController.isSourceTypeAvailable(.savedPhotosAlbum)
print("Button capture")
imagePicker.sourceType = .savedPhotosAlbum;
imagePicker.allowsEditing = false
self.present(imagePicker, animated: true, completion: nil)
@objc func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any])
let chosenImage = info[UIImagePickerControllerOriginalImage] as! UIImage
imageView.image = chosenImage
dismiss(animated: true, completion: nil)
【讨论】：
【参考方案11】：Xcode 10、Swift 4.2
下面是一个略微优化的实现版本。 这是在 Swift 4.2 中，我也测试过。
您可以在此处查看 ViewController 的完整代码。 请注意，您还必须在情节提要中定义和连接一个 IBOutlet (imageView) 和 IBAction (didTapOnChooseImageButton)。希望这会有所帮助。
import UIKit
class ImagePickViewController: UIViewController,UIImagePickerControllerDelegate,UINavigationControllerDelegate
var imagePicker = UIImagePickerController()
@IBOutlet weak var imageView: UIImageView!
override func viewDidLoad()
super.viewDidLoad()
// Do any additional setup after loading the view.
@IBAction func didTapOnChooseImageButton(_ sender: Any)
let alert:UIAlertController=UIAlertController(title: "Choose Image", message: nil, preferredStyle: UIAlertController.Style.actionSheet)
let cameraAction = UIAlertAction(title: "Camera", style: UIAlertAction.Style.default)
UIAlertAction in
self.openCamera(UIImagePickerController.SourceType.camera)
let gallaryAction = UIAlertAction(title: "Gallary", style: UIAlertAction.Style.default)
UIAlertAction in
self.openCamera(UIImagePickerController.SourceType.photoLibrary)
let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertAction.Style.cancel)
UIAlertAction in
// Add the actions
imagePicker.delegate = self as UIImagePickerControllerDelegate & UINavigationControllerDelegate
alert.addAction(cameraAction)
alert.addAction(gallaryAction)
alert.addAction(cancelAction)
self.present(alert, animated: true, completion: nil)
func openCamera(_ sourceType: UIImagePickerController.SourceType)
imagePicker.sourceType = sourceType
self.present(imagePicker, animated: true, completion: nil)
//MARK:UIImagePickerControllerDelegate
func imagePickerController(_ picker: UIImagePickerController,
didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any])
imageView.image = info[UIImagePickerController.InfoKey.originalImage] as? UIImage
imagePicker.dismiss(animated: true, completion: nil)
func imagePickerControllerDidCancel(_ picker: UIImagePickerController)
print("imagePickerController cancel")
【讨论】：
欢迎来到 SO Nish！此处不鼓励仅使用代码的答案，因为它们无法深入了解问题是如何解决的。请更新您的答案，以说明您的代码如何解决手头的问题:) 非常感谢，@Joel。我已根据您的建议更新了答案。【参考方案12】：当然，以上答案解决了主要问题。
我在 Swift 3.0 中启动相册时遇到了崩溃，因为 Info.plist 没有这些标志：
隐私 - 照片库使用说明 -> NSPhotoLibraryUsageDescription
隐私 - 相机使用说明 -> NSCameraUsageDescription
[
如果您遇到类似问题，请添加它们。
谢谢！
【讨论】：
【参考方案13】：你可以在这里做
var avatarImageView = UIImageView()
var imagePicker = UIImagePickerController()
func takePhotoFromGallery()
imagePicker.delegate = self
imagePicker.sourceType = .savedPhotosAlbum
imagePicker.allowsEditing = true
present(imagePicker, animated: true)
func imagePickerController(_ picker: UIImagePickerController,
didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any])
if let pickedImage = info[.originalImage] as? UIImage
avatarImageView.contentMode = .scaleAspectFill
avatarImageView.image = pickedImage
self.dismiss(animated: true)
希望对你有帮助
【讨论】：
【参考方案14】：这是一个简单的方法：
但首先您必须在 info.plist 中添加（隐私 - 照片库使用说明），并且您的 viewController 中应该有一个按钮和一个 UIImageView。
然后创建 UIImageView 的插座（在此代码中，插座称为 myImage）和按钮的操作（我在代码中称为操作导入）
import UIKit
class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate
override func viewDidLoad()
super.viewDidLoad()
@IBOutlet weak var myImage: UIImageView!
@IBAction func importing(_ sender: Any)
let Picker = UIImagePickerController()
Picker.delegate = self
Picker.sourceType = .photoLibrary
self.present(Picker, animated: true, completion: nil)
Picker.allowsEditing = true
Picker.mediaTypes = UIImagePickerController.availableMediaTypes(for: .photoLibrary)!
func imagePickerController(_ picker: UIImagePickerController,didFinishPickingMediaWithInfo info: [String : Any])
let chosenImage = info[UIImagePickerControllerOriginalImage] as! UIImage //1
myImage.contentMode = .scaleAspectFit //2
myImage.image = chosenImage //3
dismiss(animated:true, completion: nil) //4
【讨论】：
【参考方案15】：@IBAction func ImportImage(_ sender: Any)
let image = UIImagePickerController()
image.delegate = self
image.sourceType = UIImagePickerController.SourceType.photoLibrary
image.allowsEditing = false
self.present(image, animated: true)
//After it is complete
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any])
if let image = info[UIImagePickerController.InfoKey.originalImage] as? UIImage
myimage.image = image
else
//
self.dismiss(animated: true, completion: nil)
do
try context.save()
catch
print("Could not save. \(error), \(error.localizedDescription)")
在类定义中添加UINavigationControllerDelegate、UIImagePickerControllerDelegate委托
【讨论】：
添加cmets，解释你的答案，阅读how to answer。【参考方案16】：如果您不想使用单独的按钮，这里还有另一种方法。在 imageView 本身上附加了一个手势，点击图像时会弹出一个带有两个选项的警报。您可以选择从图库/照片库中选择或取消警报。
import UIKit
import CoreData
class AddDetailsViewController: UIViewController, UITextFieldDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate
@IBOutlet weak var imageView: UIImageView!
var picker:UIImagePickerController? = UIImagePickerController()
@IBAction func saveButton(sender: AnyObject)
let managedContext = (UIApplication.sharedApplication().delegate as? AppDelegate)!.managedObjectContext
let entity = NSEntityDescription.entityForName("Person", inManagedObjectContext: managedContext)
let person = Person(entity: entity!, insertIntoManagedObjectContext: managedContext)
person.image = UIImageJPEGRepresentation(imageView.image!, 1.0) //imageView.image
do
try person.managedObjectContext?.save()
//people.append(person)
catch let error as NSError
print("Could not save \(error)")
override func viewDidLoad()
super.viewDidLoad()
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(AddDetailsViewController.tapGesture(_:)))
imageView.addGestureRecognizer(tapGesture)
imageView.userInteractionEnabled = true
picker?.delegate = self
// Do any additional setup after loading the view.
override func didReceiveMemoryWarning()
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
func tapGesture(gesture: UIGestureRecognizer)
let alert:UIAlertController = UIAlertController(title: "Profile Picture Options", message: nil, preferredStyle: UIAlertControllerStyle.ActionSheet)
let gallaryAction = UIAlertAction(title: "Open Gallary", style: UIAlertActionStyle.Default)
UIAlertAction in self.openGallary()
let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel)
UIAlertAction in self.cancel()
alert.addAction(gallaryAction)
alert.addAction(cancelAction)
self.presentViewController(alert, animated: true, completion: nil)
func openGallary()
picker!.allowsEditing = false
picker!.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
presentViewController(picker!, animated: true, completion: nil)
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])
if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage
imageView.contentMode = .ScaleAspectFit
imageView.image = pickedImage
dismissViewControllerAnimated(true, completion: nil)
func cancel()
print("Cancel Clicked")
为问题添加更多内容，实现了将图像存储在 CoreData 中的逻辑。
【讨论】：
【参考方案17】：单击按钮并打开图片库并在 imageview swift 3.0 中设置图片
添加三个委托 UIImagePickerControllerDelegate,UIPopoverControllerDelegate,UINavigationControllerDelegate
var picker:UIImagePickerController?=UIImagePickerController()
@IBOutlet var imgPhoto: UIImageView!
override func viewDidLoad()
super.viewDidLoad()
picker?.delegate=self
@IBAction func btnAddPhotoClicked(_ sender: UIButton)
openGallary()
func openGallary()
picker!.allowsEditing = false
picker!.sourceType = UIImagePickerControllerSourceType.photoLibrary
present(picker!, animated: true, completion: nil)
//MARK:- ImagePicker Controller Delegate
//MARK:-
func imagePickerControllerDidCancel(_ picker:
UIImagePickerController)
dismiss(animated: true, completion: nil)
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any])
if let chosenImage = info[UIImagePickerControllerOriginalImage] as? UIImage
imgPhoto.contentMode = .scaleToFill
imgPhoto.image = chosenImage
else
print("Something went wrong")
self.dismiss(animated: true, completion: nil)
【讨论】：
【参考方案18】：试试这个很简单.. 使用 UIImagePickerControllerDelegate
来绘制图片 @objc func masterAction(_ sender: UIButton)
if UIImagePickerController.isSourceTypeAvailable(.savedPhotosAlbum)
print("Button capture")
imagePicker.delegate = self
imagePicker.sourceType = .savedPhotosAlbum;
imagePicker.allowsEditing = false
self.present(imagePicker, animated: true, completion: nil)
print("hello i'm touch \(sender.tag)")
func imagePickerControllerDidCancel(_ picker:
UIImagePickerController)
dismiss(animated: true, completion: nil)
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any])
if let chosenImage = info[UIImagePickerControllerOriginalImage] as? UIImage
print("Get Image \(chosenImage)")
ImageList.insert(chosenImage, at: 0)
ArrayList.insert("", at: 0)
Collection_Vw.reloadData()
else
print("Something went wrong")
self.dismiss(animated: true, completion: nil)
【讨论】：
【参考方案19】：如果你只想选择普通图像，你可以使用下面的代码，检查选择的图像不是全景图像。
let picker = UIImagePickerController()
func photoFromLibrary()
self.picker.allowsEditing = true
self.picker.sourceType = .photoLibrary
//picker.mediaTypes = UIImagePickerController.availableMediaTypes(for: .photoLibrary)!
self.present(self.picker, animated: true, completion: nil)
func shootPhoto()
if UIImagePickerController.isSourceTypeAvailable(.camera)
self.picker.allowsEditing = true
self.picker.sourceType = UIImagePickerControllerSourceType.camera
self.picker.cameraCaptureMode = .photo
self.picker.modalPresentationStyle = .fullScreen
self.present(self.picker,animated: true,completion: nil)
//Image picker delegate
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any])
let str = "\(info["UIImagePickerControllerOriginalImage"]!)"
let s = str.slice(from: "", to: "")
if let arr = s?.components(separatedBy: ",")
if arr.count >= 2
if Int(arr[0])! > 11000
picker.dismiss(animated:true, completion: nil)
self.makeToast("Invalid Image!!!")
return
if let image = info[UIImagePickerControllerOriginalImage] as? UIImage
self.UserImageView.image = image
picker.dismiss(animated:true, completion: nil)
func imagePickerControllerDidCancel(_ picker: UIImagePickerController)
picker.dismiss(animated: true, completion: nil)
【讨论】：
【参考方案20】：对于 Swift 3.4.1，此代码有效：
implements
class AddAdvertisementViewController : UINavigationControllerDelegate, UIImagePickerControllerDelegate, UIActionSheetDelegate
var imagePicker = UIImagePickerController()
var file :UIImage!
//action sheet tap on image
func tapOnButton()
let optionMenu = UIAlertController(title: nil, message: "Add Photo", preferredStyle: .actionSheet)
let galleryAction = UIAlertAction(title: "Gallery", style: .default, handler:
(alert: UIAlertAction!) -> Void in
self.addImageOnTapped()
)
let cameraAction = UIAlertAction(title: "Camera", style: .default, handler:
(alert: UIAlertAction!) -> Void in
self.openCameraButton()
)
let cancleAction = UIAlertAction(title: "Cancel", style: .cancel, handler:
(alert: UIAlertAction!) -> Void in
print("Cancel")
)
optionMenu.addAction(galleryAction)
optionMenu.addAction(cameraAction)
optionMenu.addAction(cancleAction)
self.present(optionMenu, animated: true, completion: nil)
func openCameraButton()
if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.camera)
imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = UIImagePickerControllerSourceType.camera;
imagePicker.allowsEditing = true
self.present(imagePicker, animated: true, completion: nil)
func addImageOnTapped()
if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.photoLibrary)
imagePicker.delegate = self
imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary;
imagePicker.allowsEditing = true
self.present(imagePicker, animated: true, completion: nil)
//picker pick image and store value imageview
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any])
if let image = info[UIImagePickerControllerOriginalImage] as? UIImage
file = image
imgViewOne.image = image
imagePicker.dismiss(animated: true, completion: nil);
【讨论】：
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