Question

我是整个iOS开发的新手。我想问一下，我有一个带有图像视图的vc和一个按钮（文本字段和标签不是问题），我希望当用户点击选择或拍摄个人资料照片时。用户将拍摄或选择的照片，它将替换我的静态图像视图。我怎么能做到这一点？ Here is the vc

这是我的代码：

import UIKit

class CreateAccountViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate, UITextFieldDelegate {

  @IBOutlet weak var profilePic: UIImageView!
  @IBOutlet weak var nameTextField: UITextField!
  @IBOutlet weak var emailTxtField: UITextField!
  @IBOutlet weak var pwdTextFld: UITextField!
  @IBOutlet weak var retypePwdTextField: UITextField!
  @IBOutlet weak var startEarningRewardsBtn: UIButton!
  let myPickerController = UIImagePickerController()

  override func viewDidLoad() {
    super.viewDidLoad()
    startEarningRewardsBtn.layer.cornerRadius = 4
    UIApplication.sharedApplication().statusBarStyle = .Default
    myPickerController.delegate = self
    let tapGesture = UITapGestureRecognizer(target: self, action:
    "imageTapped:")

    profilePic.addGestureRecognizer(tapGesture)
    profilePic.userInteractionEnabled = true

  }


  func imageTapped(gesture:UIGestureRecognizer) {
    if let _ = gesture.view as? UIImageView {
    print("Image Tapped")
    showActionSheet()
    }
  }

  func camera() {
   let myPickerController = UIImagePickerController()
   myPickerController.delegate = self;
   myPickerController.sourceType =  UIImagePickerControllerSourceType.Camera

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

  }

 func photoLibrary()  {

   let myPickerController = UIImagePickerController()
   myPickerController.sourceType = UIImagePickerControllerSourceType.PhotoLibrary

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

 }

  func showActionSheet() {
    let actionSheet = UIAlertController(title: nil, message: nil, preferredStyle: UIAlertControllerStyle.ActionSheet)

    actionSheet.addAction(UIAlertAction(title: "Camera", style: UIAlertActionStyle.Default, handler: { (alert:UIAlertAction!) -> Void in
  self.camera()
}))

    actionSheet.addAction(UIAlertAction(title: "Gallery", style: UIAlertActionStyle.Default, handler: { (alert:UIAlertAction!) -> Void in
  self.photoLibrary()
}))

    actionSheet.addAction(UIAlertAction(title: "Cancel", style:      UIAlertActionStyle.Cancel, handler: nil))

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

  }

  func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject!]) {

    if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage {

      profilePic.contentMode = .ScaleAspectFit
      profilePic.image = pickedImage
  }
  self.dismissViewControllerAnimated(true, completion: nil)

  }

  func imagePickerControllerDidCancel(picker: UIImagePickerController) {
  dismissViewControllerAnimated(true, completion: nil)
    }

}

Answer 1

使用UIAlertController时，我通常会这样做：

1。设置警报

let alertController = UIAlertController(title: "Change Photo", message: "To change your photo, you can:", preferredStyle: .ActionSheet)

let takePhotoAction = UIAlertAction(title: "Take Photo", style: .Default, handler: {
    (alertAction) -> Void in
        if UIImagePickerController.isCameraDeviceAvailable(.Front) {
            let imagePicker = UIImagePickerController()
            imagePicker.delegate = self
            imagePicker.sourceType = .Camera

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

let pickPhotoAction = UIAlertAction(title: "Pick Photo", style: .Default, handler: {
    (alertAction) -> Void in
        if UIImagePickerController.isSourceTypeAvailable(.PhotoLibrary) {
            let imagePicker = UIImagePickerController()
            imagePicker.delegate = self
            imagePicker.sourceType = .PhotoLibrary

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

alertController.addAction(takePhotoAction)
alertController.addAction(pickPhotoAction)

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

不要忘记将委托设置为接收拍摄或拍摄的照片。这几乎是布莱克所说的。

2。拍摄图像

在委托功能中，我拍摄图像并随心所欲地做任何事情。例如，您可以将其用于UIImageView。

func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage!, editingInfo: [NSObject : AnyObject]!) {     
    self.imageView.image = image
    self.dismissViewControllerAnimated(true)
}

这就是它。

Answer 2

在photoLibary和camera方法中，由于您在myPickerController内声明并在myPickerController中声明的myPickerController，因此声明init photoLibary实际上并没有调用{1}}方法。因此，一旦方法camera和myPickerController完成，就不再有对func camera() { myPickerController.sourceType = UIImagePickerControllerSourceType.Camera self.presentViewController(myPickerController, animated: true, completion: nil) } func photoLibrary() { myPickerController.sourceType = UIImagePickerControllerSourceType.PhotoLibrary self.presentViewController(myPickerController, animated: true, completion: nil) }的本地实例的引用，因此当您完成选择图像时，没有对代理的引用

self.dismissViewControllerAnimated(true, completion: nil)

同样如前所述，您需要在以下选择器委托方法中更改此项：

picker.dismissViewControllerAnimated(true, completion: nil)

到此：

disconnected

Answer 3

你的代码很好。您只需将它放在dispatch_async块中作为更新UI，它需要在UI主队列中运行。

if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage    
{
  dispatch_async(dispatch_get_main_queue(),
  {
    self.profilePic.contentMode = .ScaleAspectFit
    self.profilePic.image = pickedImage
  })
}

我如何将静态图像视图更改为用户选择的图像

3 个答案:

1。设置警报

2。拍摄图像