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UIActivityIndicatorView wird immer in meiner App angezeigt.UIActivityIndicatorView wird immer angezeigt
Ich mache Swift App und ich möchte ein System, in meiner app machen, die ein Bild zu meinem Django-Server hochladen. Mein Ziel ist es zu machen, wenn ich Bild wähle und ich tippe Send button, die Bilder an den Server senden, UIActivityIndicatorView ist erschienen und rollte.Aber jetzt ist UIActivityIndicatorView bereits vor der Auswahl Bild angezeigt.
import Foundation
import MobileCoreServices
import UIKit
class PhotoController:UIViewController,UINavigationControllerDelegate,UIImagePickerControllerDelegate{
@IBOutlet weak var myActivityIndicator: UIActivityIndicatorView!
@IBOutlet weak var label: UILabel!
@IBOutlet weak var myImageView: UIImageView!
private var imagePicker:UIImagePickerController!
@IBAction func uploadButtonTapped(_ sender: Any) {
myImageUploadRequest()
}
override func viewDidLoad() {
super.viewDidLoad()
label.adjustsFontSizeToFitWidth = true
label.minimumScaleFactor = 0.5
label.text = "Tap the PhotoSelect or Camera to upload a picture"
}
@IBAction func PhotoSelect(_ sender: Any) {
let myPickerController = UIImagePickerController()
myPickerController.delegate = self;
myPickerController.sourceType = UIImagePickerControllerSourceType.photoLibrary
self.present(myPickerController, animated: true, completion: nil)
}
@IBAction func Camera(_ sender: Any) {
let sourceType:UIImagePickerControllerSourceType = UIImagePickerControllerSourceType.camera
// カメラが利用可能かチェック
if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.camera){
// インスタンスの作成
let cameraPicker = UIImagePickerController()
cameraPicker.sourceType = sourceType
cameraPicker.delegate = self
self.present(cameraPicker, animated: true, completion: nil)
}
else{
label.text = "error"
}
}
// 撮影が完了時した時に呼ばれる
func imagePickerController(_ imagePicker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage {
myImageView.contentMode = .scaleAspectFit
myImageView.image = pickedImage
}
//閉じる処理
imagePicker.dismiss(animated: true, completion: nil)
label.text = "Tap the Send to save a picture"
}
// 撮影がキャンセルされた時に呼ばれる
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
picker.dismiss(animated: true, completion: nil)
label.text = "Canceled"
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func myImageUploadRequest()
{
let myUrl = NSURL(string: "http://localhost:8000/admin/accounts/post/");
let request = NSMutableURLRequest(url:myUrl! as URL);
request.httpMethod = "POST";
//ユーザーごとに割り振りたい
let param = [
"firstName" : "Sergey",
"lastName" : "Kargopolov",
"userId" : "9"
]
let boundary = generateBoundaryString()
request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
guard let myImage = myImageView.image else {
return
}
let imageData = UIImageJPEGRepresentation(myImageView.image!, 1)
if(imageData==nil) { return; }
request.httpBody = createBodyWithParameters(parameters: param, filePathKey: "file", imageDataKey: imageData! as NSData, boundary: boundary) as Data
myActivityIndicator.startAnimating();
let task = URLSession.shared.dataTask(with: request as URLRequest) {
data, response, error in
if error != nil {
print("error=\(error)")
return
}
// You can print out response object
print("******* response = \(response)")
// Print out reponse body
let responseString = NSString(data: data!, encoding: String.Encoding.utf8.rawValue)
print("****** response data = \(responseString!)")
do {
let json = try JSONSerialization.jsonObject(with: data!, options: []) as? NSDictionary
DispatchQueue.main.async {
self.myActivityIndicator.stopAnimating()
self.myImageView.image = nil;
}
}catch
{
print(error)
}
}
task.resume()
}
func createBodyWithParameters(parameters: [String: String]?, filePathKey: String?, imageDataKey: NSData, boundary: String) -> NSData {
let body = NSMutableData();
if parameters != nil {
for (key, value) in parameters! {
body.appendString(string: "--\(boundary)\r\n")
body.appendString(string: "Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n")
body.appendString(string: "\(value)\r\n")
}
}
let filename = "user-profile.jpg"
let mimetype = "image/jpg"
body.appendString(string: "--\(boundary)\r\n")
body.appendString(string: "Content-Disposition: form-data; name=\"\(filePathKey!)\"; filename=\"\(filename)\"\r\n")
body.appendString(string: "Content-Type: \(mimetype)\r\n\r\n")
body.append(imageDataKey as Data)
body.appendString(string: "\r\n")
body.appendString(string: "--\(boundary)--\r\n")
return body
}
func generateBoundaryString() -> String {
return "Boundary-\(NSUUID().uuidString)"
}
}
extension NSMutableData {
func appendString(string: String) {
let data = string.data(using: String.Encoding.utf8, allowLossyConversion: true)
append(data!)
}
}
Ich kann wirklich nicht verstehen, warum dies geschieht, schrieb ich in meinem Code
myActivityIndicator.startAnimating();
self.myActivityIndicator.stopAnimating()
Warum ist UIActivityIndicatorView immer zeigte? Wie kann ich meine ideale App erstellen? Was soll ich Code hinzufügen?
