SwiftUI 图像选择器，来自相机的 url 图像答案

【问题标题】：SwiftUI image picker, url image from cameraSwiftUI 图像选择器，来自相机的 url 图像
【发布时间】：2020-09-24 11:20:09
【问题描述】：

在我的 SwiftUI 项目中，我需要使用要在项目的其他部分重用的图像 url。

我创建了这个图像选择器，它允许我在手机相册或使用 iPhone 相机拍摄新照片之间进行选择（使用 var shootNew: Bool）

我面临以下问题：当我使用选择器从相册中选择图像时，我正在获取图像的 url，但是当我想用相机拍摄新照片时，我无法获取 url新图片，

如何获取用相机拍摄的图片的url？

这里是我的图片选择器

struct ImagePickerNew: UIViewControllerRepresentable {
    
    var shootNew: Bool
    var needEdit: Bool
    
    @Binding var image: UIImage?
    @Binding var isPresented: Bool
    @Binding var imageUrl : URL?
    
    class Coordinator: NSObject, UINavigationControllerDelegate, UIImagePickerControllerDelegate {
        
        var shootNew: Bool
        var needEdit: Bool
        @Binding var image: UIImage?
        @Binding var isPresented: Bool
        @Binding var imageUrl : URL?
        init(shootNew: Bool, needEdit: Bool, image: Binding<UIImage?>, isPresented:Binding<Bool>, imageURL1 : Binding<URL?>) {
            self.shootNew = shootNew
            self.needEdit = needEdit
            _image = image
            _isPresented = isPresented
            _imageUrl = imageURL1
        }
        
        func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
            
            if let imageEdited = info[UIImagePickerController.InfoKey.editedImage] as? UIImage {
                self.image = imageEdited
                
            } else {
                self.image = (info[UIImagePickerController.InfoKey.originalImage] as! UIImage)
            }
            if let imageURLEdited = info[UIImagePickerController.InfoKey.imageURL] as? URL{
                self.imageUrl = imageURLEdited
                debugPrint("ho url")
            } else {
                debugPrint("UNABLE URL")
            }
            self.isPresented = false
        }
        
        func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
            self.isPresented = false
        }
    }
    
    func makeCoordinator() -> Coordinator {
        return Coordinator(shootNew: shootNew, needEdit: needEdit, image: $image, isPresented: $isPresented, imageURL1: $imageUrl)
    }
    
    func makeUIViewController(context: UIViewControllerRepresentableContext<ImagePickerNew>) -> UIImagePickerController {
        let picker = UIImagePickerController()
        picker.delegate = context.coordinator
        picker.navigationController?.delegate = context.coordinator
        picker.sourceType = shootNew ? .camera : .photoLibrary
        picker.allowsEditing = needEdit
        picker.mediaTypes = [kUTTypeImage] as [String]
        return picker
    }
    
    func updateUIViewController(_ uiViewController: UIImagePickerController,
                                context: UIViewControllerRepresentableContext<ImagePickerNew>) {
        
    }
    
}

非常感谢你帮助我。

【问题讨论】：

标签： ios swift url swiftui uiimagepickercontroller

【解决方案1】：

无法获取相机拍摄的照片的URL，因为它还没有写入磁盘，你应该先将照片数据写入临时文档文件夹，然后再获取URL。这是一个例子：

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
    
    var selectedImage: UIImage!
    var imageUrl: URL!
    
    if let image = info[UIImagePickerController.InfoKey.editedImage] as? UIImage {
        selectedImage = image
    } else if let image = info[UIImagePickerController.InfoKey.originalImage] as? UIImage {
        selectedImage = image
    }
    
    if picker.sourceType == UIImagePickerController.SourceType.camera {
        
        let imgName = "\(UUID().uuidString).jpeg"
        let documentDirectory = NSTemporaryDirectory()
        let localPath = documentDirectory.appending(imgName)
        
        let data = selectedImage.jpegData(compressionQuality: 0.3)! as NSData
        data.write(toFile: localPath, atomically: true)
        imageUrl = URL.init(fileURLWithPath: localPath)
    } else if let selectedImageUrl = info[UIImagePickerController.InfoKey.imageURL] as? URL {
        imageUrl = selectedImageUrl
    }
    self.mainImageView.image = selectedImage

    MediaAPI.uploadMedia(fileUrl: imageUrl)
    self.dismiss(animated: true, completion: nil)
}

【讨论】：