ios - imagePickerController - 选择媒体后没有调用 didFinishPickingMediaWithInfo
问题描述
将应用程序从 swift 3 转换为 swift 4.2。我的应用程序有一个上传您的个人资料图片功能,该功能不再起作用,我正试图找出原因。现在我看到的是
func imagePickerController(_picker: UIImagePickerController, didFinishPickingMediaWithInfo
选择媒体后没有调用 didFinishPickingMediaWithInfo
这是我的观点完整代码:
import UIKit
class CameraMenuViewController: BaseViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
var UserID:Int = 0
@IBOutlet weak var myImageView: UIImageView!
var callback : ((UIImage) -> ())?
@IBOutlet weak var btn_end: UIButton!
@IBOutlet weak var from_camera: UIBarButtonItem!
@IBOutlet weak var from_gallery: UIBarButtonItem!
@IBAction func btn_end_pressed(_ sender: UIButton) {
//
//self.openViewControllerBasedOnIdentifier("Home")
//let data = UIImagePNGRepresentation(myImageView) as NSData?
let image = myImageView.image!.pngData() as NSData?
//if let data = UIImagePNGRepresentation(myImageView) {
print("callback data")
let userDetails:Dictionary = (UserDefaults.standard.value(forKey: "myUserDetails") as? [String:Any])!
let UserID:Int = userDetails["UserID"] as! Int
print("UserID")
print(UserID)
print("is_selfie from callback")
//save profile image as NewUserID
UserDefaults.standard.set(image, forKey: String(UserID))
UserDefaults.standard.synchronize()
self.view.removeFromSuperview()
//}
}
@IBAction func btn_closer(_ sender: UIButton) {
//self.view.removeFromSuperview()
}
@IBAction func photofromLibrary(_ sender: UIBarButtonItem) {
picker.allowsEditing = false
picker.sourceType = .photoLibrary
picker.mediaTypes = UIImagePickerController.availableMediaTypes(for: .photoLibrary)!
picker.modalPresentationStyle = .popover
present(picker, animated: true, completion: nil)
picker.popoverPresentationController?.barButtonItem = sender
}
@IBAction func shootPhoto(_ sender: UIBarButtonItem) {
if UIImagePickerController.isSourceTypeAvailable(.camera) {
print("photo shoot")
//UserDefaults.standard.set("selfie", forKey: "is_selfie")
UserDefaults.standard.set(true, forKey: "is_selfie")
UserDefaults.standard.synchronize()
DispatchQueue.main.async {
self.picker.allowsEditing = false
self.picker.sourceType = UIImagePickerController.SourceType.camera
self.picker.cameraCaptureMode = .photo
self.picker.modalPresentationStyle = .fullScreen
self.present(self.picker,animated: true,completion: nil)
}
} else {
noCamera()
}
}
let picker = UIImagePickerController()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
picker.delegate = self
DispatchQueue.global(qos: .userInitiated).async
{
self.present(self.picker, animated: true, completion: nil)
}
let language = UserDefaults.standard.object(forKey: "myLanguage") as! String
if(language=="arabic"){
//from_camera.setTitle("كاميرا",for: .normal)
//from_gallery.text.setTitle("الصور",for: .normal)
btn_end.setTitle("إنهاء",for: .normal)
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
//MARK: - Delegates
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])
{
let chosenImage = info[convertFromUIImagePickerControllerInfoKey(UIImagePickerController.InfoKey.originalImage)] as! UIImage //2
myImageView.contentMode = .scaleAspectFit //3
myImageView.image = chosenImage //4
myImageView.layer.borderWidth = 1
myImageView.layer.masksToBounds = false
myImageView.layer.borderColor = UIColor.black.cgColor
myImageView.layer.cornerRadius = myImageView.frame.height/4
myImageView.clipsToBounds = true
callback?(chosenImage)
dismiss(animated:true, completion: nil)
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
dismiss(animated: true, completion: nil)
}
func noCamera(){
let alertVC = UIAlertController(
title: "No Camera",
message: "Sorry, this device has no camera",
preferredStyle: .alert)
let okAction = UIAlertAction(
title: "OK",
style:.default,
handler: nil)
alertVC.addAction(okAction)
present(
alertVC,
animated: true,
completion: nil)
}
}
// Helper function inserted by Swift 4.2 migrator.
fileprivate func convertFromUIImagePickerControllerInfoKey(_ input: UIImagePickerController.InfoKey) -> String {
return input.rawValue
}
请帮助我理解为什么不再调用 didFinishPickingMediaWithInfo
解决方案
似乎函数声明在 Swift 3 和 4.2 之间发生了变化。Swift Migrator Tool 一定没有为您更新。发生这种情况时我会做的一个技巧是检查正确的函数声明是什么,是使用多行注释语法来注释掉你当前的函数(didFinishPickingMediaWithInfo
在你的情况下)。然后您可以再次开始输入该函数,并使用 Xcode 自动完成功能来确保您输入正确。然后,您可以将注释掉的函数的内容复制到这个新的正确函数声明中。
或者 - 您可以查看文档!根据imagePickerController上的文档,该函数应声明为:
func imagePickerController(_ picker: UIImagePickerController,
didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any])
如果你用上面的替换你的函数声明,它应该被再次调用。
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