D26 - 用 Swift 和公开资讯，打造投资理财的 Apps { 三大法人成交比重实作.1 }

为了完成三大法人的比重，我们需要两个数值

• 三大法人成交金额
• 台股日成交金额 - 这一项在前面已经完成了，直接使用 TwMarketTradingInfoManager 即可。

import Foundation

protocol MajorInvestorsModelDelegate: AnyObject {
    func didRecieve(investors: [MajorInvestor], error: Error?)
    func didRecieve(dailyTradingInfo: [TwMarketTradingInfo], error: Error?)
}

class MajorInvestorsModel {
    
    weak var delegate: MajorInvestorsModelDelegate?
    
    var majorInvestors = [MajorInvestor]()
    
    var dailyTradingInfo = [TwMarketTradingInfo]()
    
    private lazy var threeMajorManager: ThreeMajorInvestorsManager = {
        let manager = ThreeMajorInvestorsManager()
        return manager
    }()
    
    private lazy var marketManager: TwMarketTradingInfoManager = {
        let manager = TwMarketTradingInfoManager()
        return manager
    }()
    
    func requestMajorInvestorsAndTwMarket() {
        threeMajorManager.requestInvestorsInfo { [weak self] investors, error in
            self?.majorInvestors = investors
            self?.delegate?.didRecieve(investors: investors, error: error)
        }
        
        marketManager.requestTwMarketDailyTradingInfo(date: Date()) { [weak self] dailyTradingInfo, error in
            self?.dailyTradingInfo = dailyTradingInfo
            self?.delegate?.didRecieve(dailyTradingInfo: dailyTradingInfo, error: error)
        }
    }
}

接下来，在 VC 上拉出两个 UIButton，一个发动拉取资料，另一个将下一个 vc push 进来，并把拉取的资料 array 传进去。

这个 VC 还有个 Label 显示当下的状态，可以让你知道拉下来的资料状态。

MajorInvestorsViewController VC 的程序码如下

import UIKit

class MajorInvestorsViewController: UIViewController {
    
    @IBOutlet weak var stateLabel: UILabel!
    
    private lazy var model: MajorInvestorsModel = {
        let model = MajorInvestorsModel()
        model.delegate = self
        return model
    }()

    // MARK: - life cycle
    override func viewDidLoad() {
        super.viewDidLoad()
    }
    
    // MARK: - IBAction
    @IBAction func requestMajorInvestorsButtonDidTap(_ sender: Any) {
        model.requestMajorInvestorsAndTwMarket()
    }
    
    @IBAction func pushToThreeMajorInvestorButtonDidTap(_ sender: Any) {
        guard let storyboard = self.storyboard,
              let vc = storyboard.instantiateViewController(withIdentifier: "MajorInvestorsDashboardViewController") as? MajorInvestorsDashboardViewController else {
            return
        }
        
        vc.dailyTradingInfo = model.dailyTradingInfo
        vc.majorInvestors = model.majorInvestors
        navigationController?.pushViewController(vc, animated: true)
    }
}

extension MajorInvestorsViewController: MajorInvestorsModelDelegate {
    
    func didRecieve(investors: [MajorInvestor], error: Error?) {
        
        if let error = error {
            print("you got error during fetch investor info: \(error.localizedDescription)")
            return
        }
        
        print("major investors: \(investors)")
        stateLabel.text = "\(investors)"
    }
    
    func didRecieve(dailyTradingInfo: [TwMarketTradingInfo], error: Error?) {
        
        if let error = error {
            print("you got error during fetch daily trading: \(error.localizedDescription)")
            return
        }
        
        print("daily trading info: \(dailyTradingInfo)")
    }
}

传下去的 VC - MajorInvestorsDashboardViewController 目前程序码很单纯，只有两个 array。後续的计算会在下一篇开始写。

import UIKit

class MajorInvestorsDashboardViewController: UIViewController {

    var majorInvestors = [MajorInvestor]()
    
    var dailyTradingInfo = [TwMarketTradingInfo]()
    
    override func viewDidLoad() {
        super.viewDidLoad()
    }
}

台股申购日历
IT铁人赛Demo App

下方是这次 D1 ~ D12 的完成品，可以下载来试
App Store - 台股申购日历