UIImageView在从图片库中拍摄或选择图片后不使用新图像更新
UIImageView在从图片库中拍摄或选择图片后不使用新图像更新
提问于 2016-11-27 07:35:48
在拍摄照片或从照片库中选择图片后，我尝试在UIImageView中填充图像。
下面是处理照相机和照片库激活的代码：
@IBAction func activateCmera(_ sender: Any) {
if (UIImagePickerController.isSourceTypeAvailable(.camera)) {
let imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = .camera
imagePicker.allowsEditing = false
self.present(imagePicker, animated: true, completion: nil)
}
}
@IBAction func activatePhotoLib(_ sender: Any) {
if (UIImagePickerController.isSourceTypeAvailable(.photoLibrary)) {
let imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = .photoLibrary
imagePicker.allowsEditing = false
self.present(imagePicker, animated: true, completion: nil)
}
}下面是在UIImageView中填充图像的代码：
@IBOutlet weak var imageView: UIImageView!
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
let image = info[UIImagePickerControllerOriginalImage] as! UIImage
self.imageView.contentMode = .scaleAspectFit
self.imageView.image = image
self.dismiss(animated: true, completion: nil);
}目前，在我用相机拍照或从我的照片库中选择图片后，我被重定向到这个应用程序的初始视图，而没有UIImageView空间与照片更新。
任何帮助都是非常感谢的！
回答 4
Stack Overflow用户
回答已采纳
发布于 2016-11-27 07:59:23
在Swift 3中，通过将下面的keys添加到plist中，您需要获得访问plist的权限，并且需要使用正确的delegate方法。
将UIImagePickerControllerDelegate& UINavigationControllerDelegate添加到class中，并将imagePicker delegate设置为viewDidLoad &尝试下面的代码。
let imagePicker = UIImagePickerController()
@IBAction func activatePhotoLib(_ sender: UIButton) {
if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.photoLibrary) {
imagePicker.delegate = self
imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary;
imagePicker.allowsEditing = false
self.present(imagePicker, animated: true, completion: nil)
}
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
imageView.image = image
}
picker.dismiss(animated: true, completion: nil);
}输出：updated
Stack Overflow用户
发布于 2017-07-25 19:30:14
这似乎是一个问题，因为XCode未能解释imagePickerController函数语法已经改变(自Swift 3以来)。你会发现这两种方式来编写函数在网上到处都是。您还可以在XCode中使用这两种方法，而不会出现任何错误。但是只有第二个才能真正得到正确的图像。
(Option 1 - doesn't work, but XCode doesn't flag it):
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) { }
(Option 2 - this is the right syntax!):
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) { }Stack Overflow用户
发布于 2017-11-17 16:08:02
**您需要保存类似于全局对象的UIImagePickerController，在此之后，您需要将此代码推到操作函数**上。
@objc func getImage() {
imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary
imagePicker.allowsEditing = false
imagePicker.modalPresentationStyle = .overCurrentContext
present(imagePicker, animated: true)
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
imageView.image = image
}
self.dismiss(animated: true, completion: nil);
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/40826760
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