如何快速获取摄像机拍摄的图像路径
如何快速获取摄像机拍摄的图像路径
提问于 2017-06-13 13:19:36
我使用imagePickerController(_ gallery : UIImagePickerController，didFinishPickingMediaWithInfo委托方法)获取用户在照片库上选择的图像的url。但是当我试图获取由相机拍摄的图像的URL时，它会返回nill。这是我的密码。
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
if (imagePicker.sourceType == UIImagePickerControllerSourceType.camera) {
let data = UIImagePNGRepresentation(pickedImage)
UIImageWriteToSavedPhotosAlbum(pickedImage, nil, nil, nil)
if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
let imageURL = info[UIImagePickerControllerReferenceURL] as? NSURL
print(imageURL)
}
}回答 3
Stack Overflow用户
回答已采纳
发布于 2017-06-13 13:37:24
您所拍摄的图像尚未保存，也没有任何名称。您需要保存图像，然后才能获得图像的路径。这就是为什么它返回nil。
如果您从图像库中选择一个图像，而不是用相机拍摄一个图像，那么您将得到一条路径。
Stack Overflow用户
发布于 2019-12-12 01:03:09
Rashwan的答案对我也有效，我无法用UIImageToSavedPhotoAlbum保存图像，所以编写了CameraImageManager类方法来保存、加载和获取上传图像的URL。您也可以将其作为Image和URL的扩展
class CameraImageManager {
static func saveImage(imageName: String, image: UIImage) {
guard let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first else { return }
let fileName = imageName
let fileURL = documentsDirectory.appendingPathComponent(fileName)
guard let data = image.jpegData(compressionQuality: 1) else { return }
//Checks if file exists, removes it if so.
if FileManager.default.fileExists(atPath: fileURL.path) {
do {
try FileManager.default.removeItem(atPath: fileURL.path)
print("Removed old image")
} catch let removeError {
print("couldn't remove file at path", removeError)
}
}
do {
try data.write(to: fileURL)
} catch let error {
print("error saving file with error", error)
}
}
static func getImagePathFromDiskWith(fileName: String) -> URL? {
let documentDirectory = FileManager.SearchPathDirectory.documentDirectory
let userDomainMask = FileManager.SearchPathDomainMask.userDomainMask
let paths = NSSearchPathForDirectoriesInDomains(documentDirectory, userDomainMask, true)
if let dirPath = paths.first {
let imageUrl = URL(fileURLWithPath: dirPath).appendingPathComponent(fileName)
return imageUrl
}
return nil
}
static func loadImageFromDiskWith(fileName: String) -> UIImage? {
let documentDirectory = FileManager.SearchPathDirectory.documentDirectory
let userDomainMask = FileManager.SearchPathDomainMask.userDomainMask
let paths = NSSearchPathForDirectoriesInDomains(documentDirectory, userDomainMask, true)
if let dirPath = paths.first {
let imageUrl = URL(fileURLWithPath: dirPath).appendingPathComponent(fileName)
let image = UIImage(contentsOfFile: imageUrl.path)
return image
}
return nil
}
}Stack Overflow用户
发布于 2017-06-13 13:36:30
将图像保存到Photos相册后，可以在响应回调中获得路径。
func saveImage(image: UIImage, completion: @escaping (Error?) -> ()) {
UIImageWriteToSavedPhotosAlbum(image, self, #selector(image(path:didFinishSavingWithError:contextInfo:)), nil)
}
@objc private func image(path: String, didFinishSavingWithError error: NSError?, contextInfo: UnsafeMutableRawPointer?) {
debugPrint(path) // That's the path you want
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/44522756
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