[英]How to assign a picture to the UIImageView (Swift 3)
我正在尝试将图库中的图像添加到新的ViewController,但是会出错
创建具有未知类型的图像格式是一个错误致命错误:在展开Optional值时意外地发现nil
码:
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
if let im = info[UIImagePickerControllerOriginalImage] as? UIImage {
let vc = self.storyboard?.instantiateViewController(withIdentifier: "editImage") as! EditImageViewController
vc.imageView.image = im
self.present(vc, animated: true, completion: nil)
} else {
print("Something went wrong")
}
imagePicker.dismiss(animated: true, completion: nil)
}
我的错是什么?
您的EditImageViewController.imageView
是零。 要从外部传递图像,您需要将UIImage属性添加到EditImageViewController
。
要将该图像分配给UIImageView
,请使用viewDidLoad()
像这样的东西:
class EditImageViewController: UIViewController {
@IBOutlet weak var imageView: UIImageView!
var imageToAdd: UIImage?
override func viewDidLoad() {
super.viewDidLoad()
self.imageView.image = imageToAdd
}
}
要将图像传递给新控制器,只需设置imageToAdd
,所以vc.imageView.image = im
变为vc.imageToAdd = im
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