如何解决Django-访问Json
我下面有这样的json
strcmp(line,"\n")我如何访问 child_occupation数组 。我只尝试了{
"id": 1,"interviewer": "hengtw1","incidenttwg1": {
"id": 5,"child_occupation": [
6
],},}
或incidenttwg1['child_occupation']。无论如何，它仍然不起作用。
有帮助吗？？谢谢......
解决方法
检查this是否您的字符串在python中是有效的json 和 请参阅this以了解有关json编码器和解码器的更多信息
import Foundation
import UIKit
class NotificationVC: Toolbar,UITableViewDelegate,UITableViewDataSource {
private var myTableView:UITableView!
var notifications:[NotificationViewModel] = [] {
didSet {
myTableView.reloadData()
}
}
var profile = SessionManager.shared.profile
override func viewDidLoad() {
view.backgroundColor = UIColor.white
navigationController?.isToolbarHidden = false
addTableView()
loadNotifications()
}
func loadNotifications() {
print("loadNotifications")
if let user_id = profile?.sub {
let getNotifications = GETNotificationsByUserID(user_id: user_id)
getNotifications.getNotifications { notifications in
self.notifications = notifications.map { notification in
let ret = NotificationViewModel()
ret.mainNotification = notification
return ret
}
}
}
}
func addTableView() {
self.myTableView = UITableView()
self.myTableView?.translatesAutoresizingMaskIntoConstraints = false
self.myTableView.frame.size.height = self.view.frame.height
self.myTableView.frame.size.width = self.view.frame.width
self.myTableView.register(NotificationCell.self,forCellReuseIdentifier: "MyCell")
self.myTableView.dataSource = self
self.myTableView.delegate = self
self.myTableView.isScrollEnabled = true
myTableView.delaysContentTouches = false
self.view.addSubview(self.myTableView)
self.myTableView?.topAnchor.constraint(equalTo: self.view.topAnchor).isActive = true
self.myTableView?.leadingAnchor.constraint(equalTo: self.view.leadingAnchor).isActive = true
self.myTableView?.trailingAnchor.constraint(equalTo: self.view.trailingAnchor).isActive = true
self.myTableView.bottomAnchor.constraint(equalTo: self.view.bottomAnchor).isActive = true
self.myTableView.estimatedRowHeight = 100
self.myTableView.rowHeight = UITableView.automaticDimension
myTableView.layoutMargins = UIEdgeInsets.zero
myTableView.separatorInset = UIEdgeInsets.zero
}
func tableView(_ tableView: UITableView,numberOfRowsInSection section: Int) -> Int {
return notifications.count
}
func tableView(_ tableView: UITableView,cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "MyCell",for: indexPath as IndexPath) as! NotificationCell
cell.selectionStyle = .none
cell.delegate = self
let item = self.notifications[indexPath.item]
cell.viewModel = item
return cell
}
}
import Foundation
import UIKit
class NotificationCell: UITableViewCell {
static var shared = NotificationCell()
var profile = SessionManager.shared.profile
var notificationType:String?
var messageTextViewBtm:NSLayoutConstraint?
var viewModel: NotificationViewModel? {
didSet {
if let item = viewModel {
if let notificationMessage = item.mainNotification?.message {
if notificationMessage.contains("replied to your comment") {
notificationType = "reply"
} else if notificationMessage.contains("liked your comment") {
notificationType = "likedComment"
} else if notificationMessage.contains("started following you") {
notificationType = "follow"
} else if notificationMessage.contains("liked your post") {
notificationType = "likedPost"
} else if notificationMessage.contains("commented on your post") {
notificationType = "commentedPost"
}
}
if let supporter_id = item.mainNotification?.supporter_id {
if item.gotSupporter == false {
item.getUserBySupporterID(supporter_id: supporter_id)
} else {
self.user_image.image = item.supporterImage
self.username.text = item.supporterName
}
item.supporterImageDidSet = { [weak self] in self?.user_image.image = $0 }
item.supporterNameDidSet = { [weak self] in self?.username.text = $0 }
}
}
}
}
var components:URLComponents = {
var component = URLComponents()
component.scheme = "http"
component.host = "localhost"
component.port = 8000
return component
}()
lazy var username:UILabel = {
let label = UILabel()
label.text = ""
label.font = label.font.withSize(19)
label.sizeToFit()
return label
}()
lazy var user_image: UIImageView = {
let image = UIImageView()
image.isUserInteractionEnabled = true
let gesture = UITapGestureRecognizer()
gesture.addTarget(self,action: #selector(userImageClicked))
image.addGestureRecognizer(gesture)
return image
}()
lazy var messageTextView:UITextView = {
let tv = UITextView()
tv.isScrollEnabled = false
tv.isEditable = false
tv.sizeToFit()
tv.backgroundColor = UIColor.lightGray
tv.textContainer.maximumNumberOfLines = 0
tv.textContainer.lineBreakMode = .byCharWrapping
tv.font = UIFont(name: "GillSans",size: 18)
return tv
}()
override init(style: UITableViewCell.CellStyle,reuseIdentifier: String?) {
super.init(style: style,reuseIdentifier: reuseIdentifier)
addSubview(username)
addSubview(user_image)
addSubview(messageTextView)
user_imageContraints()
usernameContraints()
messageConstraints()
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func user_imageContraints() {
user_image.translatesAutoresizingMaskIntoConstraints = false
user_image.topAnchor.constraint(equalTo:topAnchor,constant: 8).isActive = true
user_image.leadingAnchor.constraint(equalTo:leadingAnchor,constant: 8).isActive = true
user_image.heightAnchor.constraint(equalToConstant: 40).isActive = true
user_image.widthAnchor.constraint(equalToConstant: 40).isActive = true
}
func usernameContraints() {
username.translatesAutoresizingMaskIntoConstraints = false
username.topAnchor.constraint(equalTo: user_image.topAnchor).isActive = true
username.leadingAnchor.constraint(equalTo: user_image.trailingAnchor,constant: 3).isActive = true
username.heightAnchor.constraint(equalToConstant: 25).isActive = true
}
func messageConstraints() {
messageTextView.translatesAutoresizingMaskIntoConstraints = false
messageTextView.topAnchor.constraint(equalTo: username.bottomAnchor).isActive = true
messageTextViewBtm = messageTextView.bottomAnchor.constraint(equalTo: bottomAnchor,constant: -20)
messageTextViewBtm?.isActive = true
messageTextView.leadingAnchor.constraint(equalTo: user_image.trailingAnchor,constant: 3).isActive = true
messageTextView.trailingAnchor.constraint(equalTo: post_image.leadingAnchor,constant: -5).isActive = true
}
}
import UIKit
import Foundation
class NotificationViewModel {
var mainNotification: Notifications?
var imageLoader: DownloadImage?
var supporterName: String? { didSet { supporterNameDidSet?(supporterName) } }
var supporterNameDidSet: ((String?)->())?
var supporterImage: UIImage? = UIImage() { didSet { supporterImageDidSet?(supporterImage) } }
var supporterImageDidSet: ((UIImage?)->())?
var gotSupporter:Bool = false
func getUserBySupporterID(supporter_id:String) {
GetUsersById(id: supporter_id).getAllPosts { user in
self.gotSupporter = true
self.imageLoader = DownloadImage()
self.imageLoader?.imageDidSet = { [weak self] image in
self?.supporterImage = image
self?.supporterImageDidSet?(image)
}
if let picture = user[0].picture {
self.imageLoader?.downloadImage(urlString: picture)
}
self.supporterName = user[0].username
self.supporterNameDidSet?(user[0].username)
}
}
}```
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