camera

using System;
using Foundation;
using UIKit;

namespace ex_camera3
{
    public partial class ViewController : UIViewController
    {
        protected ViewController(IntPtr handle) : base(handle)
        {
            // Note: this .ctor should not contain any initialization logic.
        }

        private nfloat ScreenWidth = UIScreen.MainScreen.Bounds.Width;
        private nfloat ScreenHeight = UIScreen.MainScreen.Bounds.Height;

        UIImagePickerController imagePicker;
        UIImageView imageView;


        private UIActionSheet _actionSheet = null;
        public bool isCamera;

        private void UiConfig()
        {
            UIButton selectBtn = new UIButton(UIButtonType.System);
            selectBtn.Layer.MasksToBounds = true;
            selectBtn.Layer.BorderWidth = 0.5f;
            selectBtn.Layer.BorderColor = UIColor.LightGray.CGColor;
            selectBtn.SetTitle("选择照片", UIControlState.Normal);
            selectBtn.Frame = new CoreGraphics.CGRect((ScreenWidth - 150) / 2, ScreenHeight - 80, 150, 30);
            selectBtn.TouchUpInside += But_Click;
            this.View.AddSubview(selectBtn);

            //视图容器  存放取的的照片
            imageView = new UIImageView();
            imageView.ClipsToBounds = true;
            imageView.BackgroundColor = UIColor.LightGray;
            imageView.Frame = new CoreGraphics.CGRect((ScreenWidth - 250) / 2, 100, 250, 250);
            imageView.ContentMode = UIViewContentMode.ScaleAspectFit;
            this.View.AddSubview(imageView);

            //保存相片到相册
            UIButton surviveImgBtn = new UIButton(UIButtonType.System);
            surviveImgBtn.Layer.BorderWidth = 0.5f;
            surviveImgBtn.Layer.BorderColor = UIColor.LightGray.CGColor;
            surviveImgBtn.Frame = new CoreGraphics.CGRect((ScreenWidth - 150) / 2, 400, 150, 30);
            surviveImgBtn.SetTitle("保存照片", UIControlState.Normal);
            surviveImgBtn.TouchUpInside += surviveImgBtn_Click;
            this.View.AddSubview(surviveImgBtn);

            //创建图像选择器控制
            imagePicker = new UIImagePickerController();
            imagePicker.FinishedPickingMedia += Handle_FinishedPickingMedia;
            imagePicker.Canceled += Handle_Canceled;
        }

        private void Handle_Canceled(object sender, EventArgs e)
        {
            UIAlertView alertView = new UIAlertView();
            alertView.Title = "您已取消";
            alertView.AddButton("Cancel");
            alertView.Show();
            this.imagePicker.DismissViewControllerAsync(true);

        }

        private void Handle_FinishedPickingMedia(object sender, UIImagePickerMediaPickedEventArgs e)
        {
            throw new NotImplementedException();
        }

        private void But_Click(object sender, EventArgs e)
        {
            UIActionSheet actionSheet = new UIActionSheet();
            actionSheet.Title = "请选择";
            actionSheet.AddButton("相机");
            actionSheet.AddButton("相册");
            actionSheet.AddButton("取消");
            //actionSheet.DestructiveButtonIndex = 0;
            actionSheet.CancelButtonIndex = 2;
            actionSheet.Clicked += delegate (object a, UIButtonEventArgs b)
            {
                string indexStr = b.ButtonIndex.ToString();
                if (int.Parse(indexStr) == 0)
                {
                    //相机
                    if (UIImagePickerController.IsSourceTypeAvailable(UIImagePickerControllerSourceType.Camera))
                    {
                        imagePicker.SourceType = UIImagePickerControllerSourceType.Camera;
                        //设置摄像头
                        imagePicker.CameraDevice = UIImagePickerControllerCameraDevice.Front;//前置摄像头
                                                                                             //设置闪光灯
                        imagePicker.CameraFlashMode = UIImagePickerControllerCameraFlashMode.On;//打开摄像头
                                                                                                //设置相机模式 这里面有两个模式 一个是拍摄静止的照片 一个是拍摄动的照片 也是通过CameraDevice来设置的

                        imagePicker.Canceled += Handle_Canceled;
                        this.PresentModalViewController(imagePicker, true);
                    }
                    else
                    {
                        UIAlertView alertView = new UIAlertView();
                        alertView.Title = "相机不可用";
                        alertView.AddButton("Cancel");
                        alertView.Show();
                    }
                }
                else if (int.Parse(indexStr) == 1)
                {
                    //相册
                    //设置源和媒体类型
                    imagePicker.SourceType = UIImagePickerControllerSourceType.SavedPhotosAlbum;
                    imagePicker.MediaTypes = UIImagePickerController.AvailableMediaTypes(UIImagePickerControllerSourceType.SavedPhotosAlbum);
                    this.PresentModalViewController(imagePicker, true);
                }
                else
                {
                    //取消
                }
            };
            actionSheet.ShowInView(this.View);
        }

        protected static void Handle_FinishedPickingMedia(ViewController instance, object sender, UIImagePickerMediaPickedEventArgs e)
        {
            bool isImage = false;
            switch (e.Info[UIImagePickerController.MediaType].ToString())
            {
                case "public.image":
                    Console.WriteLine("Image selected");
                    isImage = true;
                    break;
                case "public.video":
                    Console.WriteLine("Video selected");
                    break;
            }

            // get common info (shared between images and video)
            NSUrl referenceURL = e.Info[new NSString("UIImagePickerControllerReferenceUrl")] as NSUrl;
            if (referenceURL != null)
            {
                Console.WriteLine("Url:" + referenceURL.ToString());
            }

            if (isImage)
            {
                // get the original image
                UIImage originalImage = e.Info[UIImagePickerController.OriginalImage] as UIImage;
                if (originalImage != null)
                {
                    // do something with the image
                    Console.WriteLine("got the original image");
                    imageView.Image = originalImage; // display
                }
            }
            else
            { // if it's a video
              // get video url
                NSUrl mediaURL = e.Info[UIImagePickerController.MediaURL] as NSUrl;
                if (mediaURL != null)
                {
                    Console.WriteLine(mediaURL.ToString());
                }
            }

            instance.imagePicker.DismissViewControllerAsync(true);
        }

        public override void ViewDidLoad()
        {
            base.ViewDidLoad();
            // Perform any additional setup after loading the view, typically from a nib.
        }

        public override void DidReceiveMemoryWarning()
        {
            base.DidReceiveMemoryWarning();
            // Release any cached data, images, etc that aren't in use.
        }
    }
}