如何裁剪 Swift 中的图像?
How to CROP Images in Swift?
你好,我正在使用 UIImagePicker 拍摄图像,但在选择图像时我想裁剪该图像。如何做到这一点
我可以从图库中选择图像到图像视图,但是在选择图像时我需要裁剪图像。
我试过下面的代码:
class AddNewEventViewController: UIViewController, UIPickerViewDelegate,UIImagePickerControllerDelegate, UIPickerViewDataSource,UINavigationControllerDelegate {
@IBOutlet weak var imgPick: UIImageView!
var picker = UIImagePickerController()
override func viewDidLoad() {
super.viewDidLoad()
hideKeyboardWhenTappedAround()
picker.delegate = self
picker.allowsEditing = true
}
@IBAction func addProfileBtnAction(_ sender: Any) {
let actionSheetController: UIAlertController = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
actionSheetController.popoverPresentationController?.sourceView = self.contentView
let cancelAction: UIAlertAction = UIAlertAction(title: "Cancel", style: .cancel) { action -> Void in
}
actionSheetController.addAction(cancelAction)
let takePictureAction: UIAlertAction = UIAlertAction(title: "TakePhoto", style: .default) { action -> Void in
self.openCameraPicker()
}
actionSheetController.addAction(takePictureAction)
let choosePictureAction: UIAlertAction = UIAlertAction(title: "ChooseFromLibrary", style: .default) { action -> Void in
self.openPhotoGallery()
}
actionSheetController.addAction(choosePictureAction)
//Present the
self.present(actionSheetController, animated: true, completion: nil)
}
func openCameraPicker() {
picker.sourceType = UIImagePickerController.SourceType.camera
picker.cameraCaptureMode = .photo
picker.allowsEditing = true
picker.modalPresentationStyle = .fullScreen
present(picker,animated: true,completion: nil)
}
func openPhotoGallery() {
picker.sourceType = .photoLibrary
picker.allowsEditing = true
picker.mediaTypes = UIImagePickerController.availableMediaTypes(for: .photoLibrary)!
present(picker, animated: true, completion: nil)
}
// MARK: - UIImagePickerControllerDelegate Methods
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
if let img = info[UIImagePickerController.InfoKey.editedImage] as? UIImage{
imgPick.image = img
}
else if let image = info[UIImagePickerController.InfoKey.originalImage] as? UIImage {
self.imgPick.image = image
}
dismiss(animated: true, completion: nil)
}
}
像这样我得到..没有裁剪
这里我正在从画廊获取图像到图像视图,但没有裁剪。
如何裁剪图片,请帮我看代码
我检查了您的代码,发现您缺少设置 delegate
of UIImagePickerController
我现在试试 photoLibrary
class ImagePickerViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
@IBOutlet var imageView:UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
self.openPhotoGallery()
}
func openPhotoGallery() {
let picker = UIImagePickerController()
picker.delegate = self
picker.sourceType = .photoLibrary
picker.allowsEditing = true
picker.mediaTypes = UIImagePickerController.availableMediaTypes(for: .photoLibrary)!
present(picker, animated: true, completion: nil)
}
// MARK: - UIImagePickerControllerDelegate Methods
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
if let img = info[UIImagePickerController.InfoKey.editedImage] as? UIImage{
imageView.image = img
}
dismiss(animated: true, completion: nil)
}
}
你好,我正在使用 UIImagePicker 拍摄图像,但在选择图像时我想裁剪该图像。如何做到这一点
我可以从图库中选择图像到图像视图,但是在选择图像时我需要裁剪图像。
我试过下面的代码:
class AddNewEventViewController: UIViewController, UIPickerViewDelegate,UIImagePickerControllerDelegate, UIPickerViewDataSource,UINavigationControllerDelegate {
@IBOutlet weak var imgPick: UIImageView!
var picker = UIImagePickerController()
override func viewDidLoad() {
super.viewDidLoad()
hideKeyboardWhenTappedAround()
picker.delegate = self
picker.allowsEditing = true
}
@IBAction func addProfileBtnAction(_ sender: Any) {
let actionSheetController: UIAlertController = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
actionSheetController.popoverPresentationController?.sourceView = self.contentView
let cancelAction: UIAlertAction = UIAlertAction(title: "Cancel", style: .cancel) { action -> Void in
}
actionSheetController.addAction(cancelAction)
let takePictureAction: UIAlertAction = UIAlertAction(title: "TakePhoto", style: .default) { action -> Void in
self.openCameraPicker()
}
actionSheetController.addAction(takePictureAction)
let choosePictureAction: UIAlertAction = UIAlertAction(title: "ChooseFromLibrary", style: .default) { action -> Void in
self.openPhotoGallery()
}
actionSheetController.addAction(choosePictureAction)
//Present the
self.present(actionSheetController, animated: true, completion: nil)
}
func openCameraPicker() {
picker.sourceType = UIImagePickerController.SourceType.camera
picker.cameraCaptureMode = .photo
picker.allowsEditing = true
picker.modalPresentationStyle = .fullScreen
present(picker,animated: true,completion: nil)
}
func openPhotoGallery() {
picker.sourceType = .photoLibrary
picker.allowsEditing = true
picker.mediaTypes = UIImagePickerController.availableMediaTypes(for: .photoLibrary)!
present(picker, animated: true, completion: nil)
}
// MARK: - UIImagePickerControllerDelegate Methods
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
if let img = info[UIImagePickerController.InfoKey.editedImage] as? UIImage{
imgPick.image = img
}
else if let image = info[UIImagePickerController.InfoKey.originalImage] as? UIImage {
self.imgPick.image = image
}
dismiss(animated: true, completion: nil)
}
}
像这样我得到..没有裁剪
这里我正在从画廊获取图像到图像视图,但没有裁剪。
如何裁剪图片,请帮我看代码
我检查了您的代码,发现您缺少设置 delegate
of UIImagePickerController
我现在试试 photoLibrary
class ImagePickerViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
@IBOutlet var imageView:UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
self.openPhotoGallery()
}
func openPhotoGallery() {
let picker = UIImagePickerController()
picker.delegate = self
picker.sourceType = .photoLibrary
picker.allowsEditing = true
picker.mediaTypes = UIImagePickerController.availableMediaTypes(for: .photoLibrary)!
present(picker, animated: true, completion: nil)
}
// MARK: - UIImagePickerControllerDelegate Methods
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
if let img = info[UIImagePickerController.InfoKey.editedImage] as? UIImage{
imageView.image = img
}
dismiss(animated: true, completion: nil)
}
}