本文介绍了拍摄照片并保存到 Swift 中的照片库的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个拍照"按钮，按下它会打开相机，你拍照，当你选择使用照片"时，我想把它保存到照片库中.
除了保存到图书馆之外，我什么都能做.这是我必须打开相机的代码:
解决方案
使用以下代码获取从照片库中获取的图像并保存在照片库中.
代码支持 Swift 3.1 &4.0 版本:
首先，我们必须在项目的.plist文件中设置权限:-
1) 相机
<string>此应用将使用相机.</string>2) 照片库
<string>您可以选择要附加到报告中的照片.</string>3) 保存到照片库
<string>请允许访问以将照片保存在您的照片库中</string>我们需要以源代码类型打开.pilst文件，然后在里面添加权限 -
在那之后
导入 UIKit类 ViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate {@IBOutlet 弱变量 imageTake:UIImageView！var imagePicker: UIImagePickerController!覆盖 func viewDidLoad() {super.viewDidLoad()}//MARK: - 拍摄图像@IBAction func takePhoto(_ sender: UIButton) {imagePicker = UIImagePickerController()imagePicker.delegate = selfimagePicker.sourceType = .camera存在(imagePicker，动画:true，完成:nil)}//MARK: - 在此处保存图像@IBAction func save(_ sender: AnyObject) {UIImageWriteToSavedPhotosAlbum(imageTake.image!, self, #selector(image(_:didFinishSavingWithError:contextInfo:)), nil)}//MARK: - 将图像添加到库func image(_ image: UIImage, didFinishSavingWithError error: Error?, contextInfo: UnsafeRawPointer) {如果让错误 = 错误 {//我们返回了一个错误！let ac = UIAlertController(title: "Save error", message: error.localizedDescription, preferredStyle: .alert)ac.addAction(UIAlertAction(title: "OK", style: .default))存在(交流，动画:真实)} 别的 {let ac = UIAlertController(title: "Saved!", message: "您修改后的图片已保存到您的照片中.", preferredStyle: .alert)ac.addAction(UIAlertAction(title: "OK", style: .default))存在(交流，动画:真实)}}//MARK: - 在此处完成图像捕获func imagePickerController(_picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {imagePicker.dismiss(动画:true，完成:nil)imageTake.image = info[UIImagePickerControllerOriginalImage] as?用户界面图像}}Swift 4.2 代码更新 -
class ViewController: UIViewController, UINavigationControllerDelegate {@IBOutlet 弱变量 imageTake:UIImageView！var imagePicker: UIImagePickerController!枚举 ImageSource {案例照片库案例相机}覆盖 func viewDidLoad() {super.viewDidLoad()}//MARK: - 拍摄图像@IBAction func takePhoto(_ sender: UIButton) {守卫 UIImagePickerController.isSourceTypeAvailable(.camera) else {selectImageFrom(.photoLibrary)返回}selectImageFrom(.camera)}func selectImageFrom(_ source: ImageSource){imagePicker = UIImagePickerController()imagePicker.delegate = self切换源{案例.camera:imagePicker.sourceType = .camera案例.photoLibrary:imagePicker.sourceType = .photoLibrary}存在(imagePicker，动画:true，完成:nil)}//MARK: - 在此处保存图像@IBAction func save(_ sender: AnyObject) {守卫让 selectedImage = imageTake.image else {print("找不到图片！")返回}UIImageWriteToSavedPhotosAlbum(selectedImage, self, #selector(image(_:didFinishSavingWithError:contextInfo:)), nil)}//MARK: - 将图像添加到库@objc func image(_ image: UIImage, didFinishSavingWithError error: Error?, contextInfo: UnsafeRawPointer) {如果让错误 = 错误 {//我们返回了一个错误！showAlertWith(title: "Save error", message: error.localizedDescription)} 别的 {showAlertWith(title: "Saved!", message: "您的图片已保存到您的照片中.")}}func showAlertWith(title: String, message: String){让 ac = UIAlertController(title: title, message: message, preferredStyle: .alert)ac.addAction(UIAlertAction(title: "OK", style: .default))存在(交流，动画:真实)}}扩展视图控制器:UIImagePickerControllerDelegate{func imagePickerController(_picker: UIImagePickerController, didFinishPickingMediaWithInfo 信息: [UIImagePickerController.InfoKey: Any]){imagePicker.dismiss(动画:true，完成:nil)守卫让 selectedImage = info[.originalImage] 作为?UIImage 其他 {print("找不到图片！")返回}imageTake.image = selectedImage}}I have a button "take a photo" and when pressed, it opens the camera, you take a photo and when you select "Use Photo", I want it saved to the photo library.
I am able to do all but save to the library. This is the code I have to open the camera:
解决方案
Use below code for an image taken from Photo Gallery and save inside photo library.
First, we have to do the setup for Permissions inside Project's .plist file:-
1) Camera
<key>NSCameraUsageDescription</key>
<string>This app will use camera.</string>
2) Photo Library
<key>NSPhotoLibraryUsageDescription</key>
<string>You can select photos to attach to reports.</string>
3) Save to Photo Library
<key>NSPhotoLibraryAddUsageDescription</key>
<string>Please allow access to save photo in your photo library</string>
We need to open .pilst file as a Source code type then add permissions inside -
After That
import UIKit
class ViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate {
@IBOutlet weak var imageTake: UIImageView!
var imagePicker: UIImagePickerController!
override func viewDidLoad() {
super.viewDidLoad()
}
//MARK: - Take image
@IBAction func takePhoto(_ sender: UIButton) {
imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = .camera
present(imagePicker, animated: true, completion: nil)
}
//MARK: - Saving Image here
@IBAction func save(_ sender: AnyObject) {
UIImageWriteToSavedPhotosAlbum(imageTake.image!, self, #selector(image(_:didFinishSavingWithError:contextInfo:)), nil)
}
//MARK: - Add image to Library
func image(_ image: UIImage, didFinishSavingWithError error: Error?, contextInfo: UnsafeRawPointer) {
if let error = error {
// we got back an error!
let ac = UIAlertController(title: "Save error", message: error.localizedDescription, preferredStyle: .alert)
ac.addAction(UIAlertAction(title: "OK", style: .default))
present(ac, animated: true)
} else {
let ac = UIAlertController(title: "Saved!", message: "Your altered image has been saved to your photos.", preferredStyle: .alert)
ac.addAction(UIAlertAction(title: "OK", style: .default))
present(ac, animated: true)
}
}
//MARK: - Done image capture here
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
imagePicker.dismiss(animated: true, completion: nil)
imageTake.image = info[UIImagePickerControllerOriginalImage] as? UIImage
}
}
class ViewController: UIViewController, UINavigationControllerDelegate {
@IBOutlet weak var imageTake: UIImageView!
var imagePicker: UIImagePickerController!
enum ImageSource {
case photoLibrary
case camera
}
override func viewDidLoad() {
super.viewDidLoad()
}
//MARK: - Take image
@IBAction func takePhoto(_ sender: UIButton) {
guard UIImagePickerController.isSourceTypeAvailable(.camera) else {
selectImageFrom(.photoLibrary)
return
}
selectImageFrom(.camera)
}
func selectImageFrom(_ source: ImageSource){
imagePicker = UIImagePickerController()
imagePicker.delegate = self
switch source {
case .camera:
imagePicker.sourceType = .camera
case .photoLibrary:
imagePicker.sourceType = .photoLibrary
}
present(imagePicker, animated: true, completion: nil)
}
//MARK: - Saving Image here
@IBAction func save(_ sender: AnyObject) {
guard let selectedImage = imageTake.image else {
print("Image not found!")
return
}
UIImageWriteToSavedPhotosAlbum(selectedImage, self, #selector(image(_:didFinishSavingWithError:contextInfo:)), nil)
}
//MARK: - Add image to Library
@objc func image(_ image: UIImage, didFinishSavingWithError error: Error?, contextInfo: UnsafeRawPointer) {
if let error = error {
// we got back an error!
showAlertWith(title: "Save error", message: error.localizedDescription)
} else {
showAlertWith(title: "Saved!", message: "Your image has been saved to your photos.")
}
}
func showAlertWith(title: String, message: String){
let ac = UIAlertController(title: title, message: message, preferredStyle: .alert)
ac.addAction(UIAlertAction(title: "OK", style: .default))
present(ac, animated: true)
}
}
extension ViewController: UIImagePickerControllerDelegate{
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]){
imagePicker.dismiss(animated: true, completion: nil)
guard let selectedImage = info[.originalImage] as? UIImage else {
print("Image not found!")
return
}
imageTake.image = selectedImage
}
}
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