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我正在尝试在 xcode 8 swift 3 中创建一个应用程序，用户在其中使用 imagePickerController 添加图像，然后当用户单击保存或退出 imagePickerController 时，我希望将图像保存在本地，因此下次应用程序是已加载(例如在设备重启后)图像在那里。明确地说，我不想将图像保存到相机胶卷中。到目前为止，这是我的代码，没有任何保存或加载方法，(只是保存按钮引用)任何帮助将不胜感激，因为我已经尝试了很长时间。
import UIKit
class timetable: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate {
@IBOutlet var imageviewtimetable: UIImageView!
@IBAction func save(_ sender: Any) {
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
@IBAction func selectImageFromPhotoLibrary(_ sender: Any) {
let imagePickerController = UIImagePickerController()
imagePickerController.sourceType = .photoLibrary
imagePickerController.delegate = self
present(imagePickerController, animated: true, completion: nil)
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController){
dismiss(animated: true, completion:nil)
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
let selectedImage = info[UIImagePickerControllerOriginalImage] as! UIImage
imageviewtimetable.image = selectedImage
dismiss(animated: true,completion:nil)
}
}
最佳答案
信息:click here
将图像保存在文档目录中
func saveImageDocumentDirectory() {
let fileManager = NSFileManager.defaultManager()
let paths = (getDirectoryPath() as NSString).stringByAppendingPathComponent("apple.jpg")
let image = UIImage(named: "apple.jpg")
print(paths)
let imageData = UIImageJPEGRepresentation(image!, 0.5)
fileManager.createFileAtPath(paths as String, contents: imageData, attributes: nil)
}
获取文档目录路径
func getDirectoryPath() -> String {
let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)
let documentsDirectory = paths[0]
return documentsDirectory
}
从文档目录获取图片
func getImage(){
let fileManager = NSFileManager.defaultManager()
let imagePath = (self.getDirectoryPath() as NSString).stringByAppendingPathComponent("apple.jpg")
if fileManager.fileExistsAtPath(imagePath){
self.imageView.image = UIImage(contentsOfFile: imagePath)
} else {
print("No Image")
}
}
创建目录
func createDirectory(){
let fileManager = NSFileManager.defaultManager()
let paths = getDirectoryPath() as NSString).stringByAppendingPathComponent("customDirectory")
if !fileManager.fileExistsAtPath(paths){
try! fileManager.createDirectoryAtPath(paths, withIntermediateDirectories: true, attributes: nil)
} else {
print("Already dictionary created.")
}
}
关于ios - 如何在 UIImageView 中保存和加载图像？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/42919891/