UIImage可从图像库iOS中选择

Question

我想从图片库中选择任何图片，而不是位于Assets中的名为"蒙娜丽莎"的图片。有可能吗？

func addPainting(_ hitResult: ARHitTestResult, _ grid: Grid) {
// 1.
let planeGeometry = SCNPlane(width: 0.2, height: 0.35)
let material = SCNMaterial()
material.diffuse.contents = UIImage(named: "mona-lisa")
planeGeometry.materials = [material]
// 2.
let paintingNode = SCNNode(geometry: planeGeometry)
paintingNode.transform = SCNMatrix4(hitResult.anchor!.transform)
paintingNode.eulerAngles = SCNVector3(paintingNode.eulerAngles.x + (-Float.pi / 2), paintingNode.eulerAngles.y, paintingNode.eulerAngles.z)
paintingNode.position = SCNVector3(hitResult.worldTransform.columns.3.x, hitResult.worldTransform.columns.3.y, hitResult.worldTransform.columns.3.z)
sceneView.scene.rootNode.addChildNode(paintingNode)
grid.removeFromParentNode()
}

Answer 1

如上所述，您可以使用UIImagePickerController从图像库中拾取图像。

这里的小例子如何使用它。

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
@IBOutlet var imageView: UIImageView!
let imagePicker = UIImagePickerController()

@IBAction func loadImageButtonTapped(sender: UIButton) {
imagePicker.allowsEditing = false
imagePicker.sourceType = .photoLibrary // The defined source type means the you take images from system gallery.
present(imagePicker, animated: true, completion: nil)
}
override func viewDidLoad() {
super.viewDidLoad()
imagePicker.delegate = self
}
// MARK: - UIImagePickerControllerDelegate Methods
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any])  {
if let pickedImage = info[UIImagePickerController.InfoKey.originalImage] as? UIImage {
imageView.contentMode = .scaleAspectFit
imageView.image = pickedImage // Here you have the image which was picked in gallery.
}
dismiss(animated: true, completion: nil)
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
dismiss(animated: true, completion: nil)
}
}