iOS UITests - XCUIElements 标识符的用途

Question

在 iOS UITests 上工作时，我发现 XCUIElement has a property, identifier, which was confronted from XCUIElementAttributes. When I debug, I found this is a real-only property and always contains empty string. Can anyone explain what purpose this property serves? I am unable to get any distinguishing property between two XCUIElement

我无法更改标识符，它是不可变的。

Answer 1

XCUIElement 的 identifier 属性 与其代表的 UIView 的可访问性标识符相同。

// app code
let someButton: UIButton!
someButton.accessibilityIdentifier = "myIdentifer"

// test code
let button = XCUIApplication().buttons["myIdentifier"] // get XCUIElement for the button
print(button.identifier) // => "myIdentifier"

如果identifier为空，这是因为accessibilityIdentifier 属性还没有在view上设置