如何在 Swift 3 中使用 JSON 填充 TableView
Posted
技术标签:
【中文标题】如何在 Swift 3 中使用 JSON 填充 TableView【英文标题】:How to populate TableView with jSON in Swift 3 【发布时间】:2017-02-03 23:56:57 【问题描述】:对不起,伙计们,我又老了。我正在伸出援手,因为我需要第二个 tableView 的帮助,我想在另一个视图控制器中实现。我基本上从另一个实际工作的 tableView 控制器复制了这段代码。所以我不确定我在哪里搞砸了,但我真的很感谢你的帮助。
class MCViewController: UIViewController, UITableViewDataSource, UITableViewDelegate
let message_url = "https://www.distribber.com/api/resources/get_film_message/film_id/3825"
let send_url = "https://www.distribber.com/api/resources/send_film_message"
let film_id = "3825"
var messageArray = [String]()
weak var messageView : UITableView!
func messageView(_ messageView: UITableView, numberOfRowsInSection section: Int) -> Int
return messageArray.count
func messageView(_ messageView: UITableView, cellForRowAt indexPath: IndexPath) -> MessageTableViewCell
let cell = messageView.dequeueReusableCell(withIdentifier: "msgContent", for:indexPath) as! MessageTableViewCell
// Configuring Cell
cell.msgContent.text = messageArray[indexPath.row]
// Returning the cell
return cell
@IBOutlet weak var MessageInput: UITextField!
@IBAction func Sendmsg(_ sender: Any)
Sendmsg(username:MessageInput.text!, password: film_id)
override func viewDidLoad()
super.viewDidLoad()
messageView.dataSource = self
messageView.delegate = self
// Do any additional setup after loading the view.
//let post_data: NSDictionary = NSMutableDictionary()
// post_data.setValue(username, forKey: "username")
// post_data.setValue(password, forKey: "password")
let url:URL = URL(string: message_url)!
let session = URLSession.shared
let request = NSMutableURLRequest(url: url)
request.httpMethod = "GET"
request.setValue("740c94c51891c02b64d6c78840b478fe0b02fe2c", forHTTPHeaderField: "X-API-KEY")
request.setValue("Basic YmhlZW0uZW5nckBnbWFpbC5jb206YmgzM20=", forHTTPHeaderField: "Authorization")
request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
// Do any additional setup after loading the view.
var paramString = ""
// for (key, value) in post_data
//
// paramString = paramString + (key as! String) + "=" + (value as! String) + "&"
//
//
request.httpBody = paramString.data(using: String.Encoding.utf8)
let task = session.dataTask(with: request as URLRequest, completionHandler:
(
data, response, error) in
guard let _:Data = data, let _:URLResponse = response , error == nil else
return
let json: Any?
do
json = try JSONSerialization.jsonObject(with: data!, options: [])
if let parsedData = json as? [[String:Any]]
for dict in parsedData
if let title = dict["message"] as? String
self.messageArray.append(title)
print(json)
OperationQueue.main.addOperation(
self.messageView.reloadData()
)
catch
return
guard let server_response = json as? NSDictionary else
return
if let data_block = server_response["data"] as? NSDictionary
if let session_data = data_block["session"] as? String
// self.login_session = session_data
let preferences = UserDefaults.standard
preferences.set(session_data, forKey: "session")
// DispatchQueue.main.async(execute: self.LoginDone)
)
task.resume()
override func didReceiveMemoryWarning()
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
func Sendmsg(username:String, password:String)
let post_data: NSDictionary = NSMutableDictionary()
post_data.setValue(username, forKey: "message")
post_data.setValue(password, forKey: "film_id")
let url:URL = URL(string: send_url)!
let session = URLSession.shared
let request = NSMutableURLRequest(url: url)
request.httpMethod = "POST"
request.setValue("740c94c51891c02b64d6c78840b478fe0b02fe2c", forHTTPHeaderField: "X-API-KEY")
request.setValue("Basic YmhlZW0uZW5nckBnbWFpbC5jb206YmgzM20=", forHTTPHeaderField: "Authorization")
request.cachePolicy = NSURLRequest.CachePolicy.reloadIgnoringCacheData
var paramString = ""
for (key, value) in post_data
paramString = paramString + (key as! String) + "=" + (value as! String) + "&"
request.httpBody = paramString.data(using: String.Encoding.utf8)
let task = session.dataTask(with: request as URLRequest, completionHandler:
(
data, response, error) in
guard let _:Data = data, let _:URLResponse = response , error == nil else
return
let json: Any?
do
json = try JSONSerialization.jsonObject(with: data!, options: [])
print(json)
catch
return
guard let server_response = json as? NSDictionary else
return
// if let data_block = server_response["data"] as? NSDictionary
//
// if let session_data = data_block["session"] as? String
//
// self.login_session = session_data
//
// let preferences = UserDefaults.standard
// preferences.set(session_data, forKey: "session")
//
// DispatchQueue.main.async(execute: self.LoginDone)
//
//
//
)
task.resume()
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
*/
【问题讨论】:
问题出在哪里?视图没有填充还是没有正确解析? @Prientus 你知道我做错了什么吗? @MacStation 说 'MCViewController' 不符合协议 'UITableViewDataSource' 并且它不会构建 【参考方案1】:您正在实现 UITableViewDataSource 但没有实现它所需的方法。
func tableView(UITableView, cellForRowAt: IndexPath)
func numberOfSections(in: UITableView)
实现这两个,不符合协议的错误应该消失。
【讨论】:
以上是关于如何在 Swift 3 中使用 JSON 填充 TableView的主要内容,如果未能解决你的问题,请参考以下文章
如何让 json 在 Swift 3 中填充 UITableView?
从 Swift 中的 Json 响应中填充 TableSection
IOS swift如何使用返回的Json数据填充我的TableView
从 Firebase 下载 json 并填充 TableView Swift 3