ios - 如何将 JSON 数据从 viewController 传递到 UIView 以用于标签

Question

我目前正在尝试找到一种方法将从我的 API 请求收到的 JSON 传递到我的 UIView，以便它可以用于标签文本，但是我不使用 Storyboard，并且我所有的 View Controller 都是以编程方式制作的，所以下面是我正在尝试获取数据的文件以及我正在接收 View Controller 中的数据的函数

profileView.swift

import Foundation
import UIKit
import PureLayout

class profileView: UIView {
var shouldSetupConstraints = true



var profileImageContainer = UIView()
var profileImage = UIImageView(image: UIImage(named: "logo"))
var first_name = UILabel()
var last_name = UILabel()


let screenSize = UIScreen.main.bounds
let gradient = CAGradientLayer()
let textFieldAppearance = UITextField.appearance()


override init(frame: CGRect) {
    super.init(frame: frame)

    gradient.colors = [UIColor(red: (0/255.0), green: (114/255.0), blue: (255/255.0), alpha: 1).cgColor , UIColor(red: (0/255.0), green: (198/255.0), blue: (255/255.0), alpha: 1).cgColor]
    gradient.startPoint = CGPoint(x: 0, y: 0)
    gradient.endPoint = CGPoint(x: 1, y: 0)
    gradient.cornerRadius = 4

    profileImage.center = CGPoint(x: screenSize.width/2, y:screenSize.height/2)


    self.addSubview(profileImage)

   first_name.frame = CGRect(x: screenSize.height/11, y: screenSize.width/2, width: 100, height: 50)
   first_name.font = UIFont(name: "HelveticaNeue-light", size: 24)
    first_name.textColor = .black

    self.addSubview(first_name)



    textFieldAppearance.keyboardAppearance = .light


}






required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
}


override func updateConstraints() {
    if(shouldSetupConstraints) {
        // AutoLayout constraints
        shouldSetupConstraints = false
    }
    super.updateConstraints()
}


}

mainViewController.swift

@objc func login(_ sender: UIButton){
    let url = URL(string: "http://myapi.com/login.php")
    var request = URLRequest(url: url!)
    request.httpMethod = "POST"

    //getting values from text fields
    let email = loginViewer.email.text
    let password = loginViewer.password.text

    //creating the post parameter by concatenating the keys and values from text field
    let postParameters = "email="+email!+"&password="+password!;

    //adding the parameters to request body
    request.httpBody = postParameters.data(using: String.Encoding.utf8)


    //creating a task to send the post request
    let task = URLSession.shared.dataTask(with: request as URLRequest){
        data, response, error in

        if error != nil{
            print(error!)
            return
        }

        //parsing the response
        do {
            //converting resonse to NSDictionary
            let myJSON =  try JSONSerialization.jsonObject(with: data!, options: .allowFragments) as? NSDictionary

            //parsing the json
            if let parseJSON = myJSON {

                //creating a string
                var msg : String!
                var first_name : String!
                var last_name : String!
                //getting the json response
                msg = parseJSON["message"] as! String?
                first_name = parseJSON["first_name"] as! String?
                last_name = parseJSON["last_name"] as! String?
                //printing the response
                print(msg)
                print(first_name)
                print(last_name)

                let profileView = profile()
                profileView.first_name = first_name
                self.present(profile(), animated: true, completion: nil)

            }
        } catch {
            print(error)
        }

    }
    //executing the task
    task.resume()

 }

Answer 1

你的问题就在这里

let profileView = profile()
profileView.first_name = first_name
self.present(profile(), animated: true, completion: nil)

首先你不能呈现 View ，只能呈现 VC，因此你需要将此 View 嵌入到 VC 中，OR

var profileV:profileView!

//

DispatchQueue.main.async {
   self.profileV = profileView(frame:self.view.frame)
   self.profileV.first_name.text = first_name
   self.view.addSubview(profileV)
}

删除

self.profileV.removeFromSuperview()

downSide 缺少动画，因此将其插入到 VC 中以获取 animated:true 的值