用按钮设置标签编号后如何将标签数据传输到新的控制器标签 [英] How to transfer label data to new controller label after label number is set with button

问题描述

所以我如何将ViewController标签:totalPar转移到ThirdViewController标签:totalPar5.我想使用减号和加号按钮传输添加到其中的数据

So how i transfer my ViewController label: totalPar to ThirdViewController label: totalPar5. And I want to transfer data that I have added there with my minus and plus buttons

这是模拟器图片，显示了我想要转移的内容

Here is simulator pic that show what I want to transfer

我的ThirdViewController几乎与ViewController相同，除了准备segue

My ThirdViewController is almost same as ViewController except prepare segue

这是我的ViewController

Here is my ViewController

import UIKit

class ViewController: UIViewController {

@IBOutlet weak var totalPar: UILabel!
@IBOutlet weak var plusminusPar: UILabel!
@IBOutlet weak var currentPar: UILabel!


var totalPAR = Int()
var plusminusPAR = 0
var currentPAR = 0



override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.
}


@IBAction func minusButton(_ sender: Any) {

    totalPAR = Int(totalPar.text!)!
    self.totalPar.text = String(totalPAR - 1)

    plusminusPAR = Int(plusminusPar.text!)!
    self.plusminusPar.text = String(plusminusPAR - 1)

    currentPAR = Int(currentPar.text!)!
    self.currentPar.text = String(currentPAR - 1)
}

@IBAction func plusButton(_ sender: Any) {

    totalPAR = Int(totalPar.text!)!
    self.totalPar.text = String(totalPAR + 1)

    plusminusPAR = Int(plusminusPar.text!)!
    self.plusminusPar.text = String(plusminusPAR + 1)

    currentPAR = Int(currentPar.text!)!
    self.currentPar.text = String(currentPAR + 1)
}



@IBAction func Seuraava(_ sender: Any) {
    self.performSegue(withIdentifier: "next1", sender: Any?.self)
}


@IBAction func seiraava2(_ sender: Any) {
    self.performSegue(withIdentifier: "seuraava2", sender: Any?.self)
}



override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    let thirdviewcontroller = segue.destination as! ThirdViewController
    thirdviewcontroller.totalPAR5 = self.totalPAR
}


}

推荐答案

从接受的答案及其注释中，您需要开始改进代码并大致了解数据源的一些概念.

From the accepted answer and its comments you need to start improving your code and learn some concepts of data source in general.

对于您的情况，请停止不断将字符串转换为整数并转换为字符串.选择一个或另一个:

For your case stop constantly converting string to integers to string. Choose one or the other:

class ViewController: UIViewController {

var totalPAR: Int = 0
var plusminusPAR: Int = 0
var currentPAR: Int = 0

对动作和单独的方法进行自然操作:

Do natural operations on actions and separate methods:

@IBAction func minusButton(_ sender: Any) {
    addToAll(valueToAdd: -1)
    refreshLabels()
}

private func addToAll(valueToAdd: Int) {
    totalPAR += valueToAdd
    plusminusPAR += valueToAdd
    currentPAR += valueToAdd
}

private func refreshLabels() {
    self.totalPar.text = String(totalPAR)
    self.plusminusPar.text = String(plusminusPAR) 
    self.currentPar.text = String(currentPAR)
}

那么您将不会有任何问题

Then you will have no issues calling

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if let thirdviewcontroller = segue.destination as? ThirdViewController {
        thirdviewcontroller.totalPAR = self.totalPAR
        thirdviewcontroller.plusminusPAR = self.plusminusPAR
        thirdviewcontroller.currentPAR = self.currentPAR
    }
}

现在，如果您在两个视图控制器中都在viewDidLoad上调用了refreshLabels，则值已成功传输.

Now if in both view controllers you call refreshLabels on viewDidLoad the values are successfully transferred.

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