添加到测试目标时的IBDesignable错误 [英] IBDesignable Errors When Adding to Tests Target

问题描述

我有一个简单的 UIButton 子类，用 IBInspectable IBDesignable c $ c> var：

I have a simple UIButton subclass that implements IBDesignable with an IBInspectable var:

@IBDesignable class Button: UIButton {
    @IBInspectable var borderColor: UIColor = UIColor.whiteColor() {
        didSet { layer.borderColor = borderColor.CGColor }
    }
}

我没有在框架中使用它，它在Interface Builder中按预期工作，但是，一旦我将这个子类添加到我的 Tests 目标，它停止渲染实时，我得到以下错误：

I am not using this within a framework and it is working in Interface Builder as intended, however, once I add this subclass to my Tests target, it stops rendering live and I get the following errors:

Main.storyboard: error: IB Designables: Failed to update auto layout status: dlopen(TestTests.xctest, 1): Library not loaded: @rpath/XCTest.framework/XCTest
Referenced from: TestTests.xctest
Reason: image not found

Main.storyboard: error: IB Designables: Failed to render instance of Button: dlopen(TestTests.xctest, 1): Library not loaded: @rpath/XCTest.framework/XCTest
Referenced from: TestTests.xctest
Reason: image not found

如果我删除 IBDesignable 和 IBInspectable vars，错误就会消失 - 不幸的是，实时渲染也是如此Interface Builder。

If I remove IBDesignable and the IBInspectable vars, the errors go away - unfortunately so does the live rendering in Interface Builder.

如何在没有这些错误的情况下测试 IBDesignable 类？

How do I test against an IBDesignable class without these errors?

推荐答案

起初，我认为这是Xcode中的一种错误。以下是我找到的解决方法：

At first, I thought this was a kind of bug in Xcode. Following is the workaround I found:

第1步

标记您的课程和属性为 public 。

Mark your class and properties as public.

@IBDesignable public class Button: UIButton {
    @IBInspectable public var borderColor: UIColor = UIColor.whiteColor() {
        didSet { layer.borderColor = borderColor.CGColor }
    }

    @IBInspectable public var borderWidth:CGFloat = 0.0 {
        didSet { layer.borderWidth = borderWidth }
    }
}

第2步

从测试模块导入应用程序模块。

Import your application module from your "Tests" module.

例如，假设您的应用程序名为 MyGreatApp ，在 MyGreatAppTests / MyGreatAppTests中.swift ：

For example, assuming that your application is named MyGreatApp, in your MyGreatAppTests/MyGreatAppTests.swift:

import UIKit
import XCTest
import MyGreatApp

class MyGreatAppTests: XCTestCase {

    func testExample() {
        let btn = Button()
        btn.borderColor = UIColor.redColor()
        XCTAssertEqual(UIColor(CGColor:btn.layer.borderColor), UIColor.redColor(), "borderColor")
    }
}

您无需在测试目标中添加Button.swift。

You don't need to add 'Button.swift' to your "Tests" target.

第3步（适用于Swift）

STEP 3 (for Swift)

在您的故事板中，为任何自定义类明确选择模块MyGreatApp，而不是让Xcode使用当前模块。

In your storyboard explicitly select the module MyGreatApp for any custom classes instead of letting Xcode use the current module.

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