RxTest：架构x86_64和arm64的未定义符号

Question

我将尝试运行《Raywenderlich RxSwift》书中第16章：使用RxTest进行测试的以下测试代码：

Raywenderlich RxSwift

import XCTest
import RxSwift
import RxTest
@testable import Testing

class TestingViewModel : XCTestCase {

var viewModel: ViewModel!
var scheduler: ConcurrentDispatchQueueScheduler!

override func setUp() {
super.setUp()

viewModel = ViewModel()
scheduler = ConcurrentDispatchQueueScheduler(qos: .default)
}

func testColorNameIsRayWenderlichGreenWhenHexStringIs006636() {

// 1
let colorNameObservable = viewModel.colorName.asObservable().subscribeOn(scheduler)

// 2
viewModel.hexString.value = "#006636"

// 3
XCTAssertEqual("rayWenderlichGreen", try! colorNameObservable.toBlocking().first()!)
 }
}

但是模拟器上出现了以下错误：

Undefined symbols for architecture x86_64: "type metadata for RxCocoa.DriverSharingStrategy", referenced from: TestingTests.TestingViewModel.testColorNameIsRayWenderlichGreenWhenHexStringIs006636() -> () in TestingViewModel.o "protocol witness table for RxCocoa.DriverSharingStrategy : RxCocoa.SharingStrategyProtocol in RxCocoa", referenced from: TestingTests.TestingViewModel.testColorNameIsRayWenderlichGreenWhenHexStringIs006636() -> () in TestingViewModel.o "RxCocoa.SharedSequence.asObservable() -> RxSwift.Observable", referenced from: TestingTests.TestingViewModel.testColorNameIsRayWenderlichGreenWhenHexStringIs006636() -> () in TestingViewModel.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation)

还有这个在iPhone 6s上：

Undefined symbols for architecture arm64: "type metadata for RxCocoa.DriverSharingStrategy", referenced from: TestingTests.TestingViewModel.testColorNameIsRayWenderlichGreenWhenHexStringIs006636() -> () in TestingViewModel.o "protocol witness table for RxCocoa.DriverSharingStrategy : RxCocoa.SharingStrategyProtocol in RxCocoa", referenced from: TestingTests.TestingViewModel.testColorNameIsRayWenderlichGreenWhenHexStringIs006636() -> () in TestingViewModel.o "RxCocoa.SharedSequence.asObservable() -> RxSwift.Observable", referenced from: TestingTests.TestingViewModel.testColorNameIsRayWenderlichGreenWhenHexStringIs006636() -> () in TestingViewModel.o ld: symbol(s) not found for architecture arm64 clang: error: linker command failed with exit code 1 (use -v to see invocation)

不幸的是，Raywenderlich的论坛中没有针对此问题的支持。

- Hamed Ghadirian

Answer 1

经过很多搜索，有人在这里提到了类似问题，我发现导入 RxCocoa 可以解决这个错误。

- Hamed Ghadirian