Step 1: 拍照或者从相册里选择图片
首先 要import UIImagePickerControllerDelegate,
UINavigationControllerDelegate 两个类。
class ViewController: UIViewController,UIImagePickerControllerDelegate,
UINavigationControllerDelegate{
@IBOutlet weak var pickedImage: UIImageView!
再调用设置UIImagePickerController
func cameraAction() {
if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.camera){
let imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = UIImagePickerControllerSourceType.camera;
imagePicker.allowsEditing = false
self.present(imagePicker,animated: true, completion: nil)
}
}
func libraryAction() {
if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.photoLibrary){
let imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary;
imagePicker.allowsEditing = false
self.present(imagePicker,animated: true, completion: nil)
}
}
最后隐藏照片选择界面，并讲选中的照片设置在 UIImage 里
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
pickedImage.image = info[UIImagePickerControllerOriginalImage] as! UIImage
self.dismiss(animated: true, completion: nil)
}
遇到的问题：
1 通过UIImagePickerControllerDelegate 拍照得到的照片的Orientation 并不是正的（通过UIImage.imageOrientation 查看）而从photo library 里面挑选的照片位置是正的。查阅资料发现iphone 拍照的时候默认的位置是 横着 home键在右侧。
解决：
// swift 3 code:
extension UIImage{
func normalizedImage() -> UIImage {
if (self.imageOrientation == UIImageOrientation.up) {
return self;
}
UIGraphicsBeginImageContextWithOptions(self.size, false, self.scale);
let rect = CGRect(x: 0, y: 0, width: self.size.width, height: self.size.height)
self.draw(in: rect)
let normalizedImage : UIImage = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext();
return normalizedImage;
}
}
(未完待续）
Reference：
http://stackoverflow.com/questions/5427656/ios-uiimagepickercontroller-result-image-orientation-after-upload/10611036#10611036
https://www.cnblogs.com/jiangyazhou/archive/2012/03/22/2412343.html
