ios - 使用图像选择器的三个图像

Question

我正在构建一个允许用户向三张UIImageViews添加三张图片的应用
我添加了三个按钮，例如，当用户单击一个按钮时，他应该能够将图像添加到UIImageView 1
但是图像没有出现在UIImageView上，我没有找到任何解决方案

代码示例:

 @IBAction func imageOneBtn(sender: AnyObject) {
        picker.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
        picker.delegate = self
        picker.allowsEditing = false
        self.presentViewController(picker, animated: true, completion: nil)

        func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]){
            let selectedImage = info[UIImagePickerControllerOriginalImage] as! UIImage
            imageViewOne.image = selectedImage
            imageViewOne.contentMode = UIViewContentMode.ScaleAspectFit
            picker.dismissViewControllerAnimated(true, completion: nil)
        }
    }

先感谢您

Answer 1

该代码似乎是正确的。

let selectedImage = info[UIImagePickerControllerOriginalImage] as! UIImage

尝试删除感叹号(!)。

尝试使用 imageViewOne.contentMode = .ScaleAspectFit
也尝试使用 var而不是 let selectedImage
一般来说，尝试此代码

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) {
var selectedImage = info[UIImagePickerControllerOriginalImage] as UIImage
imageViewOne.contentMode = .ScaleAspectFit
imageViewOne.image = selectedImage
dismissViewControllerAnimated(true, completion: nil)
}