ios - XCTest 如何执行呈现模态视图的 segue 并测试 presentedViewController

Question

我试图测试一个会呈现 View Controller 的转场。但是，它总是失败。如何等待转场完成？请协助。

[self.viewController performSegueWithIdentifier:@"mySegueName" sender:self.viewController];
XCTAssertNotNil(self.viewController.presentedViewController, @"Failed to show modal view");

Answer 1

问题是您正试图在 UIViewController 上呈现，其 View 不在 UIWindow 层次结构中。这是我的解决方案:

- (void)testExample {

    //
    // Arrange
    // Storyboard
    //
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];

    //
    // Arrange
    // View Controller
    //
    UIViewController *viewController = [storyboard instantiateViewControllerWithIdentifier:@"ViewController"];
    [UIApplication sharedApplication].keyWindow.rootViewController = viewController;

    //
    // Act
    //
    [viewController performSegueWithIdentifier:@"ModalSegue" sender:nil];

    //
    // Assert
    //
    XCTAssertNotNil(viewController.presentedViewController);

}