无法从 UITextField 获取文本 - Swift - iOS [英] Cannot get text from UITextField - Swift - iOS

问题描述

我有一个用 Swift 编写的 iOS 应用.我正在努力从 UITextField 获取文本，因为我的应用程序在这行代码上崩溃了:

I have an iOS app written in Swift. I am struggling to get the text from the UITextField because my app crashes on this line of code:

let dataUser = self.userField.text

我收到以下崩溃报告:

fatal error: unexpectedly found nil while unwrapping an Optional value

我做错了什么?...我想做的就是从文本字段中获取文本.

What am I doing wrong?... all I want to do is get the text from the text field.

谢谢，丹.

推荐答案

在 Interface Builder 中检查您的 UITextField 是否正确链接到您的userField"IBOutlet:您的 UITextField，self.userField，可能是未连接到 IBOutlet，因此该对象为零并且在尝试访问其 .text 属性时崩溃.

Check in Interface Builder that your UITextField is properly linked to your "userField" IBOutlet: your UITextField, self.userField, is probably not hooked to the IBOutlet, so the object is nil and it crashes when trying to access its .text property.

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