ios - 当我启动应用程序时，我看到一个白屏并告诉我这个错误，我该如何解决？

Question

当我启动应用程序时，我看到一个白屏并告诉我这个错误，我该如何解决？错误出现在这一行:

![我的标签.alpha = 0]

错误是线程 1:EXC_BAD_INSTRUCTION(code=EXC_I386_INVOP,subcode0x0)

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
          myLabel.alpha = 0
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

Answer 1

您的@IBOutlet 必须已失效。也许你在连接它或其他原因后重命名它。您应该删除现有的并重新创建。
请查看my answer in other thread on how to do this .