Question

在Swift中有问题。我想为学校写一个程序。对于奇数尾巴，应显示A周，而对于B天则应显示偶数天。该日期可以读取。但是，如果我始终对ee进行编程，那么我总是会收到错误消息String。我不知道如何改变它。有人可以进一步帮助我吗？

import UIKit
class ViewController: UIViewController {

    @IBOutlet weak var Datum: UILabel!
    @IBOutlet weak var Monat: UILabel!
    @IBOutlet weak var Woche: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()

        let jetzt = Date()
        let formatter = DateFormatter()
        formatter.dateFormat = "d"
        Datum.text = formatter.string(from: jetzt)

        let jetzt2 = Date()
        let formatter2 = DateFormatter()
        formatter2.dateFormat = "M"
        Monat.text = formatter2.string(from: jetzt2)
        // Do any additional setup after loading the view, typically from a nib.
    }
    @IBAction func Check(_ sender: Any) {
        if Datum.text = "3"
        Woche.text = "A-Woche"
    }
}

Answer 1

尝试一下

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var Datum: UILabel!
    @IBOutlet weak var Monat: UILabel!
    @IBOutlet weak var Woche: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()

        let jetzt = Date()
        let formatter = DateFormatter()
        formatter.dateFormat = "d"
        Datum.text = formatter.string(from: jetzt)

        let jetzt2 = Date()
        let formatter2 = DateFormatter()
        formatter2.dateFormat = "M"
        Monat.text = formatter2.string(from: jetzt2)
    }

    @IBAction func Check(_ sender: Any) {
        if Datum.text == "3"{
            Woche.text = "A-Woche"
        } else {
            Woche.text = "B-Woche"
        }

    }
}

为什么在X代码中使用此代码无效，有人知道吗？

1 个答案: