swift - presentViewController如何显示 View ？

我对presentViewController对第一个参数imagePickerController所做的事情感到好奇。考虑到我分配imagePickerController属性的方式，presentViewController会使用所有这些信息来显示视图吗？

@IBAction func imageFromPhotoLibrary(sender: UITapGestureRecognizer) {
    // Hide the keyboard.
    myTextField.resignFirstResponder()

    // UIImagePickerController is a view controller that lets a user pick media from their photo library.
    let imagePickerController = UIImagePickerController()

    // Only allow photos to be picked, not taken.
    imagePickerController.sourceType = .PhotoLibrary

    // Make sure ViewController is notified when the user picks an image.
    imagePickerController.delegate = self

    presentViewController(imagePickerController, animated: true, completion: nil)
}

最佳答案

presentViewController将不使用任何选项。您传入的imagePickerController将使用这些选项。

由于Apple API的设计非常好，因此presentViewController可以做一件事（SRP），并且完全按照它所说的去做...为您提供传递给它的视图控制器。

imagePickerController负责控制图像选择器的视图。