objective-c - 从 Swift 测试文件调用 Objective-C 类

Question

我正在努力实现单元测试。原始项目是用 Objective-C 编写的。

我创建了一个用 Swift 编写的新测试目标。

如何在我的测试文件中调用实际应用的 Objective-C 类？

我已尝试执行以下操作。

@testable import MyModule

但是，这似乎只有在所有文件都在 Swift 中时才有效，但对我来说并非如此。

我已经尝试了一些其他的项目设置，但是，这些似乎都不起作用。

我是否漏掉了一些明显的东西？

class MyTests: XCTestCase {

    override func setUp() {
        super.setUp()
        // Put setup code here. This method is called before the invocation of each test method in the class.
    }

    override func tearDown() {
        // Put teardown code here. This method is called after the invocation of each test method in the class.
        super.tearDown()
    }

    func testExample() {
        let vc = HomeViewController() //this line is failing. How do I expose this view controller written in objective c?
        // This is an example of a functional test case.
        // Use XCTAssert and related functions to verify your tests produce the correct results.
    }
}

Answer 1

您需要创建桥接 header 并将 Objective-C 文件添加到其中。 创建桥接 header YourProductName-Bridging-Header.h，然后在桥接 header 中 import HomeViewController。

To import Objective-C code into Swift from the same target

In your Objective-C bridging header file, import every Objective-C header you want to expose to Swift. For example:

#import "XYZCustomCell.h"
#import "XYZCustomView.h"
#import "XYZCustomViewController.h" 

In Build Settings, in Swift Compiler - Code Generation, make sure the Objective-C Bridging Header build setting under has a path to the bridging header file. The path should be relative to your project, similar to the way your Info.plist path is specified in Build Settings. In most cases, you should not need to modify this setting.

下面是一些可以帮助你的资源

1. Using Swift with Objective-C
2. Answer to another stack overflow qustion
3. How to use Objective-C in swift