ios - 从另一个类中的函数获取返回值

Question

我在 swift 中有两个类，TestView() 和 compileResults()。

我在 compileResults() 中有返回值的函数。我需要将该值返回给 TestView()。

我已经设法从 TestView() 中在 compileResults() 中设置了一个值，但我似乎无法返回一个值。

我已经按照在其他地方使用委托(delegate)的相同方式设置了委托(delegate)，但它似乎仍然没有产生结果。

测试 View :

import UIKit
import Foundation

class TestView: UIViewController, XMLParserDelegate {

    weak var resStartDelegate: ResStartDelegate?

    override func viewDidLoad() {
        super.viewDidLoad()

        resStartDelegate?.setConTypeResult(val: "WiFi")
        print("ConType is: ", resStartDelegate?.getConTypeResult()) //outputs value nil
    }

编译结果:

import Foundation

protocol ResStartDelegate: class {
    func getConTypeResult() -> String
    func setConTypeResult(val: String)
}

var testViewDelegate = TestView()

var theTestResults : [String: String] = [
    "conType": ""
]

class complileResults : ResStartDelegate {

    init() {
        setDelegate()
    }

    func setDelegate() {
        testViewDelegate.resStartDelegate = self
    }

    func resetResults() {
        theTestResults["conType"] = ""
    }

    func setConTypeResult(val: String) {
        theTestResults["conType"] = val
        print("Just set contype to: ", theTestResults["conType"]) //prints correctly what has been passed from TestView
    }

    func getConTypeResult() -> String {
        return theTestResults["conType"] ?? "Err"
    }

}

编辑:这似乎如我所愿，有什么问题吗？

编译结果.swift

import Foundation

class complileResults {//: ResStartDelegate {

    var theTestResults : [String: String] = [
        "conType": "",
        "date": "",
        "time": "",
        "jitter": "",
        "loss": "",
        "dspeed": "",
        "uspeed": "",
        "delay": ""
    ]

    func setConTypeResult(val: String) {
        theTestResults["conType"] = val
    }

    func getConTypeResult() -> String {
        return theTestResults["conType"] ?? "Err"
    }
}

测试 View .swift

var comResClass = complileResults()

    class TestView: UIViewController, XMLParserDelegate {

        override func viewDidLoad() {
            super.viewDidLoad()
            comResClass.setConTypeResult(val: "WiFi")
            let ct = comResClass.getConTypeResult()
            print("CT ", ct)
        }
}

Answer 1

有一些方法可以做到这一点。

    class complileResults {

    var theTestResults : [String: String] = [
        "conType": "",
        "date": "",
        "time": "",
        "jitter": "",
        "loss": "",
        "dspeed": "",
        "uspeed": "",
        "delay": ""
    ]
}

class TestView: UIViewController, XMLParserDelegate {

    let result = complileResults()

    override func viewDidLoad() {
        super.viewDidLoad()
        result.theTestResults["conType"] = "WiFi"
        print(result.theTestResults["conType"] ?? "Err")
    }
}

或者这个更通用一些。

class orcomplileResults {

    var theTestResults : [String: String] = [
        "conType": "",
        "date": "",
        "time": "",
        "jitter": "",
        "loss": "",
        "dspeed": "",
        "uspeed": "",
        "delay": ""
    ]

    func setResult(key: String, value: String) {
        theTestResults[key] = value
    }

    func getResult(key: String) -> String {
        return (theTestResults[key] ?? "Err")
    }
}

class orTestView: UIViewController, XMLParserDelegate {

    let result = orcomplileResults()

    override func viewDidLoad() {
        super.viewDidLoad()
        result.setResult(key: "conType", value: "WiFi")
        print(result.getResult(key: "conType"))
    }
}