Swift 5

首先在故事板或ViewDidLoad中为单元格的ImageView提供一个可访问性标识符

func testIsImageViewNil() {
    let imageView = app.images["PhotosCollectionViewController.ImageCell.ImageView"]
    XCTAssertNotNil(imageView)
}

public func hasImageViewInside(_ cell: UITableViewCell) -> Bool {
    for child in cell.subviews {
        if let _ = child as? UIImageView {
            return true
        }
    }
    return false
}

for viw in cell.contentView.subviews {
        if ((viw as? UIImageView) != nil) {
            print("123")
        }
    }

cell.images.element.assert(\.exists)

您可以使用图像视图的这个XCUIElement来代替.assert(\.exists)

for case let imageView as UIImageView in cell.contentView.subviews  {
      if imageView.tag == 1001 {
         imageView.image = UIImage(named: "myCustomImage")
      }
  }

  //OR Altervnatively

  cell.contentView.subviews.flatMap { $0 as? UIImageView }.forEach { imageView in
      if imageView.tag == 1001 {
         imageView.image = UIImage(named: "myCustomImage")
      }
  }