思路：开始想将下载的文档存到特定位置，然后上传到的时候去取文件的本体，转为NSData，然后上传，后来发现实现太过麻烦，随弃之。重新思考需求是什么？需求本质是对下载的文档可以分享出去（到PC端，打印盖章），然后上传PDF到服务器进行人工审核（图片的话体积会大会自动压缩，压缩无法保证清晰度，随弃之），最终实现：通过文件链接下载——存储到沙盒文件夹——通过文件的NSURL分享到微信——文件PC端编辑——传到iCloud——从ICloud选择该文件上传到服务器并获得文件的最新链接——...
🔥：图片上传一般转为NSData，文件上传传的是本地存储位置的NSURL，这种方式的优点是可以一次性多张图片，多文档，多字符串参数，多对多混搭上传，成倍缩减工作量，优势极其明显。
项目中需要进行文档的操作：
需求一： 通过网络连接下载文档并分享到微信，airdop等等，进行编辑（签字盖章）
1.下载文档
/// AFN 下载文件
func requestDownload(_ URL: URL) {
NNProgressHUD.showLoading("载入中...")
let config = URLSessionConfiguration.default
let manager = AFHTTPSessionManager(sessionConfiguration: config)
let request = URLRequest(url: URL)
let task = manager.downloadTask(with: request, progress: { (progress) in
let current = progress.completedUnitCount/progress.totalUnitCount
DDLog("current:\(current)")
}, destination: { (url, response) -> URL in
let documentsDirectoryURL = try? FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: false)
let docURL: URL = (documentsDirectoryURL?.appendingPathComponent(response.suggestedFilename!))!
return docURL
}) { (response, url, error) in
DDLog("File downloaded to:\(url?.path ?? "地址错误")")
self.localFileUrl = url as NSURL?
if error != nil {
NNProgressHUD.showError(error?.localizedDescription)
} else {
NNProgressHUD.dismiss()
}
}
task.resume()
}
2.预览下载的文件，看是否正确
var localFileUrl: NSURL?{
willSet{
if newValue == nil {
return
}
DispatchQueue.main.async {
self.preController.reloadData()
}
}
}
override func viewDidLoad() {
super.viewDidLoad()
edgesForExtendedLayout = []
view.backgroundColor = UIColor.white
// Do any additional setup after loading the view.
preController.view.frame = self.view.bounds
self.addChild(preController)
preController.didMove(toParent: self)
self.view.addSubview(preController.view)
}
/// 预览视图
lazy var preController: QLPreviewController = {
let controller = QLPreviewController()
controller.edgesForExtendedLayout = []
controller.dataSource = self
controller.delegate = self
controller.currentPreviewItemIndex = 0
return controller
}()
3.确定是需要下载的文档，分享到分享到微信，airdop等等，进行编辑（签字盖章）
///展示文件分享弹窗
func presentOptionsMenu() {
guard let url = localFileUrl as URL? else {
NNProgressHUD.showText("文件链接不能为空")
return
}
delegate?.fileShare?(url.path, forKey: key)
docController.url = url
let result = docController.presentOptionsMenu(from: self.view.bounds, in: self.view, animated: true)
if result == false {
DDLog("没有程序可以打开要分享的文件")
}
}
/// 文件分享弹窗
lazy var docController: UIDocumentInteractionController = {
let controller = UIDocumentInteractionController()
controller.delegate = self;
controller.presentPreview(animated: true)
return controller
}()
需求二：选择之前（签字盖章）的本地文档并上传到服务器端
首先将文档保存在你熟悉的位置，iCloud， Documents
1.选择某一文档
func showDocmentPicker() {
present(docPickVC, animated: true, completion: nil)
}
static let docTypes = ["com.microsoft.word.doc",
"com.adobe.pdf",
"public.text",
]
/// 文件选择器
lazy var docPickVC: UIDocumentPickerViewController = {
let controller = UIDocumentPickerViewController(documentTypes: IOPFileUploadController.docTypes, in: .import)
controller.modalPresentationStyle = .fullScreen
controller.delegate = self
return controller
}()
2.预览文件（同上）
3.上传文档（成功后接口返回对应url）
/// AFN上传文件
func requestUpload() {
NNProgressHUD.showLoading("上传中...")
let urlString = "*/img_upload"
let parameters: [String: Any] = ["token": "680b2275a2318b076a6c883908bae43e",
"file": localFileUrl as Any,
]
let config = URLSessionConfiguration.default
let manager = AFHTTPSessionManager(sessionConfiguration: config)
manager.requestSerializer.setValue("multipart/form-data", forHTTPHeaderField: "Content-Type")
manager.requestSerializer.setValue("IOP/iOS", forHTTPHeaderField: "User-Agent")
manager.requestSerializer.setValue("3.3.1", forHTTPHeaderField: "Accept-Version")
manager.post(urlString, parameters: nil, constructingBodyWith: { (formData) in
for (key, value) in parameters {
switch value {
case is String:
if let data = (value as! String).data(using: .utf8) {
formData.appendPart(withForm: data, name: key)
}
case is Data:
formData.appendPart(withForm: value as! Data, name: key)
case is URL, is NSURL:
do{
try formData.appendPart(withFileURL: value as! URL, name: key)
} catch {
DDLog("error:\(error.localizedDescription)")
}
default:
break
}
}
}, progress: { (progress) in
let currentValue = progress.completedUnitCount/progress.totalUnitCount
DDLog("currentValue_\(currentValue)")
}, success: { (task, responseObject) in
NNProgressHUD.showSuccess("请求成功")
let dic = (responseObject as! [String: Any])["data"] as! [String: Any]
self.delegate?.fileUpload?(dic["url"] as! String, forKey: self.key)
}) { (task, error) in
NNProgressHUD.showError(error.localizedDescription)
}
}
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