Working delay on tableview

[satoshinosekai]

I use the following code in my project,

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
	let message = dataArray.object(at: indexPath.row) as! Message
	if message.ID == "904" {
		let cell = tableView.cellForRow(at: indexPath) as! ImageATableViewCell
		let configuration = ImageViewerConfiguration { config in
			config.imageView = cell.contentImage
		}
		present(ImageViewerController(configuration: configuration), animated: true)
	} else {
		let cell = tableView.cellForRow(at: indexPath) as!  ImageBTableViewCell
		let configuration = ImageViewerConfiguration { config in
			config.imageView = cell.contentImage
		}
		present(ImageViewerController(configuration: configuration), animated: true)
	}
}

When i click the row, it will work after around 1~10 second,
The weird thing is when i one more tap the screen, function can immediately work,
I also use the same image source test on UICollectionViewController, it's perfect work.

How can i fix that? thanks a lot :)

[satoshinosekai]

OK, I fix it use DispatchQueue.main.async {}

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
	let message = dataArray.object(at: indexPath.row) as! Message
	DispatchQueue.main.async {
		if message.ID == "904" {
			let cell = tableView.cellForRow(at: indexPath) as! ImageATableViewCell
			let configuration = ImageViewerConfiguration { config in
				config.imageView = cell.contentImage
			}
			self.present(ImageViewerController(configuration: configuration), animated: true)
		} else {
			let cell = tableView.cellForRow(at: indexPath) as!  ImageBTableViewCell
			let configuration = ImageViewerConfiguration { config in
				config.imageView = cell.contentImage
			}
			self.present(ImageViewerController(configuration: configuration), animated: true)
		}
	}
}