Question

Hello Guys我正在开发一款应用程序，当你点击一个按钮时，它会打开iOS相机并让你拍照我知道如何在objc中执行此操作但使用Xamarin编写的应用程序使用Xamarin i＆＃ 39;我看了Xamarin表格并谷歌寻求帮助，但一切都是iOS 8后这个应用程序需要运行所以这里是我迄今为止的代码：

photobutton.TouchUpInside += delegate {
//insert Xamarin code here

        };

编辑我将以下代码添加到新课程中：

using Foundation;
using System;
using System.CodeDom.Compiler;
using UIKit;

namespace ToolBelt.iOS
{
    public partial class cameraViewController : UIViewController
    {
        public cameraViewController (IntPtr handle) : base (handle)
        {       
        }



        public override void DidReceiveMemoryWarning ()
        {
            // Releases the view if it doesn't have a superview.
            base.DidReceiveMemoryWarning ();

            // Release any cached data, images, etc that aren't in use.
        }

        public override void ViewDidLoad ()
        {
            base.ViewDidLoad ();


            //UIPopoverController popover = new UIPopoverController (ctrl);

            // Perform any additional setup after loading the view, typically from a nib.
        }

        public override void ViewDidAppear (bool animated)
        {
            base.ViewDidAppear (animated);

            UIImagePickerController picker = new UIImagePickerController ();picker.PrefersStatusBarHidden ();

            picker.SourceType = UIImagePickerControllerSourceType.Camera;
            PresentViewController(picker, true, () => {});
        }


    }
}

任何帮助都很棒

提前谢谢！

Answer 1

你差不多完了它。只需为Picker添加委托处理程序，请查看：https://developer.xamarin.com/recipes/ios/media/video_and_photos/choose_a_photo_from_the_gallery/

我在下面添加了跟随您现有源代码的事件

UIImagePickerController imagePicker;

public override void ViewDidAppear (bool animated)
{
    base.ViewDidAppear (animated);

    imagePicker = new UIImagePickerController();
    imagePicker.PrefersStatusBarHidden ();

    imagePicker.SourceType = UIImagePickerControllerSourceType.Camera;

    //Add event handlers when user finished Capturing image or Cancel
    imagePicker.FinishedPickingMedia += Handle_FinishedPickingMedia;
    imagePicker.Canceled += Handle_Canceled;

    //present 
    PresentViewController(picker, true, () => {});
}

protected void Handle_FinishedPickingMedia (object sender, UIImagePickerMediaPickedEventArgs e)
{
    // determine what was selected, video or image
    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 it was an image, get the other image info
    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());
        }
    }
    // dismiss the picker
    imagePicker.DismissModalViewControllerAnimated (true);
}

void Handle_Canceled (object sender, EventArgs e) {
    imagePicker.DismissModalViewControllerAnimated(true);
}

Answer 2

我的运行良好：

public partial class CameraViewController : UIViewController
{
    static UIImagePickerController picker;
    static UIImageView staticImageView;

    public CameraViewController() : base("CameraViewController", null)
    {
    }

    public override void ViewDidLoad()
    {
        base.ViewDidLoad();
        base.Title = "Kamera";
        staticImageView = this.imageView;
    }

    partial void openCamera(UIButton sender)
    {
        if (UIImagePickerController.IsSourceTypeAvailable(UIImagePickerControllerSourceType.Camera))
        {
            picker = new UIImagePickerController();
            picker.Delegate = new CameraDelegate();
            picker.SourceType = UIImagePickerControllerSourceType.Camera;
            NavigationController.PresentViewController(picker, true, null);
        }
        else
        {
            this.button.Hidden = true;
        }


    }

    class CameraDelegate : UIImagePickerControllerDelegate
    {
        public override void FinishedPickingMedia(UIImagePickerController picker, NSDictionary info)
        {
            picker.DismissModalViewController(true);
            var image = info.ValueForKey(new NSString("UIImagePickerControllerOriginalImage")) as UIImage;
            CameraViewController.staticImageView.Image = image;
        }
    }

}

方法＆＃34; openCamera＆＃34;通过.xib文件连接到Button事件。

Answer 3

您可以使用XLabs：https://github.com/XLabs/Xamarin-Forms-Labs

XLabs提供可以拍照的相机服务：https://github.com/XLabs/Xamarin-Forms-Labs/wiki/Camera

如果您不熟悉XLabs，可以使用以下链接来帮助您入门。请记住将XLabs nuget包添加到您的所有项目（PCL，iOS，Android） http://www.codenutz.com/getting-started-xamarin-forms-labs-xaml-mvvm-ioc/ https://github.com/XLabs/Xamarin-Forms-Labs/tree/master/Samples

如何在XLabs中使用解析器：https://forums.xamarin.com/discussion/20178/xamarin-forms-labs-peeps

编辑：XLabs MediaPicker可以在Xamarin.Forms和非Xamarin.Forms应用程序中使用。

如何使用iOS相机拍照并使用Xamarin将图像保存到相机胶卷

3 个答案: