保存图像然后加载到Swift(iOS)
发布时间:2020-12-14 05:48:34 所属栏目:百科 来源:网络整理
导读:我正在使用saveImage保存图像. func saveImage (image: UIImage,path: String ) - Bool{ let pngImageData = UIImagePNGRepresentation(image) //let jpgImageData = UIImageJPEGRepresentation(image,1.0) // if you want to save as JPEG print("!!!saving
我正在使用saveImage保存图像.
func saveImage (image: UIImage,path: String ) -> Bool{ let pngImageData = UIImagePNGRepresentation(image) //let jpgImageData = UIImageJPEGRepresentation(image,1.0) // if you want to save as JPEG print("!!!saving image at: (path)") let result = pngImageData!.writeToFile(path,atomically: true) return result } 新信息: 保存文件无法正常工作(打印“[ – ] ERROR SAVING FILE”) – // save your image here into Document Directory let res = saveImage(tempImage,path: fileInDocumentsDirectory("abc.png")) if(res == true){ print ("[+] FILE SAVED") }else{ print ("[-] ERROR SAVING FILE") } 为什么saveImage函数没有保存图像?访问权? 旧信息: 调试信息说: !!!saving image at: file:///var/mobile/Applications/BDB992FB-E378-4719-B7B7-E9A364EEE54B/Documents/tempImage 然后我使用检索此位置 fileInDocumentsDirectory("tempImage") 结果是正确的. 然后我使用此路径加载文件 let image = UIImage(contentsOfFile: path) if image == nil { print("missing image at: (path)") }else{ print("!!!IMAGE FOUND at: (path)") } 路径是正确的,但消息是“在…处丢失图像”.文件是否以某种方式无法访问或未存储?这种行为可能是什么原因? 我正在使用ios 7和带有ios 7模拟器的iphone 5在iphone 4上测试此代码. 编辑: func fileInDocumentsDirectory(filename: String) -> String { let documentsURL = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory,inDomains: .UserDomainMask)[0] let fileURL = documentsURL.URLByAppendingPathComponent(filename).absoluteString return fileURL }
斯威夫特3
此功能将图像保存在文档文件夹中: func saveImage(image: UIImage) -> Bool { guard let data = UIImageJPEGRepresentation(image,1) ?? UIImagePNGRepresentation(image) else { return false } guard let directory = try? FileManager.default.url(for: .documentDirectory,in: .userDomainMask,appropriateFor: nil,create: false) as NSURL else { return false } do { try data.write(to: directory.appendingPathComponent("fileName.png")!) return true } catch { print(error.localizedDescription) return false } } 使用: let success = saveImage(image: UIImage(named: "image.png")!) 这个函数将获得该图像: func getSavedImage(named: String) -> UIImage? { if let dir = try? FileManager.default.url(for: .documentDirectory,create: false) { return UIImage(contentsOfFile: URL(fileURLWithPath: dir.absoluteString).appendingPathComponent(named).path) } return nil } 使用: if let image = getSavedImage(named: "fileName") { // do something with image } (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |
相关内容