ios - iOS 应用程序中的 line 有一个线程断点

Question

我正在使用 Xcode，我使用的语言是 Swift 3，我在第 39 行“断点”处发现了这个问题

class ViewController: UIViewController {

    @IBOutlet weak var NameTextLabel: UILabel!
    @IBOutlet weak var ExplainTextLabel: UILabel!
    @IBOutlet weak var PriceTextLabel: UILabel!
    @IBOutlet weak var FeaturesTextLabel: UILabel!

    let Features = ["Features Include: Siri acts as a musicologist, Advanced searches..., Works with Apple Music, etc", " Feautres Include: Up to 18 Cores, Thunderbolt 3, 5k Display, etc",
        "Feautres Include: AR technology, I messages wont take up storage, A redesinged appstore, etc", "New Faces, Siri Face, Better Pairing Process"]

    let Explain = ["Apple Smart Speaker", "Most Powerfull Mac", "The New OS", "Watch OS4"]

    let Price = ["At $349", "At $4999", "Free", "Free"]

    let Name =  ["Homepod", "iMac Pro", "iOS 11", "Watch OS4"]

    @IBAction func MoreDidTap(sender: AnyObject) {

        let randomNumber = Int(arc4random()) % 4

        let NewName = Name [randomNumber]
        let NewExplain = Explain [randomNumber]
        let NewPrice = Price [randomNumber]
        let NewFeatures = Features [randomNumber]

        NameTextLabel.text = NewName
        ExplainTextLabel.text = NewExplain
        PriceTextLabel.text = NewPrice
        FeaturesTextLabel.text = NewFeatures (This line has a thread breakpoint can anyone help)
    }

}

Answer 1

我怀疑您是说 Xcode 会在该行停止，即使您没有在该行手动设置断点。

我的猜测是您没有在 Storyboard中连接 FeaturesTextLabel 导出。尝试将 print(FeaturesTextLabel) 放在第 39 行之前。输出是什么？如果为nil，则 socket 未连接。