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mschmulen/AppDelegate.cs

Forked from conceptdev/AppDelegate.cs
Created November 13, 2012 19:05
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  1. mschmulen revised this gist Nov 13, 2012. No changes.
  2. @conceptdev conceptdev created this gist Aug 18, 2012.
    47 changes: 47 additions & 0 deletions AppDelegate.cs
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    using System;
    using System.Collections.Generic;
    using System.Linq;

    using MonoTouch.Foundation;
    using MonoTouch.UIKit;

    namespace AccessImageMetadata
    {
    public class Application
    {
    // This is the main entry point of the application.
    static void Main (string[] args)
    {
    // if you want to use a different Application Delegate class from "AppDelegate"
    // you can specify it here.
    UIApplication.Main (args, null, "AppDelegate");
    }
    }

    [Register ("AppDelegate")]
    public partial class AppDelegate : UIApplicationDelegate
    {
    // class-level declarations
    UIWindow window;
    UINavigationController navigationController;
    UIViewController imageViewController;

    public override bool FinishedLaunching (UIApplication app, NSDictionary options)
    {
    // create a new window instance based on the screen size
    window = new UIWindow (UIScreen.MainScreen.Bounds);
    navigationController = new UINavigationController ();

    imageViewController = new ImageViewController ();

    navigationController.PushViewController(imageViewController, false);

    window.RootViewController = navigationController;

    // make the window visible
    window.MakeKeyAndVisible ();

    return true;
    }
    }
    }
    97 changes: 97 additions & 0 deletions ImageViewController.cs
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    using System;
    using System.Collections.Generic;
    using System.Drawing;
    using MonoTouch.Foundation;
    using MonoTouch.UIKit;
    using MonoTouch.CoreFoundation;
    using MonoTouch.ImageIO;

    // Image Properties reference
    // http://developer.apple.com/library/ios/#documentation/GraphicsImaging/Reference/CGImageProperties_Reference/Reference/reference.html#//apple_ref/doc/uid/TP40005103

    namespace AccessImageMetadata
    {
    public class ImageViewController : UIViewController
    {
    // UI controls
    UIImageView imageView;
    UITextView output;
    UILabel overlabel;

    public ImageViewController ()
    {
    }

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

    View.BackgroundColor = UIColor.White;
    Title = "Image Metadata";

    var imageFilename = "img.jpg"; // ADD YOUR IMAGE HERE

    // original sample
    // http://developer.apple.com/library/ios/ipad/#qa/qa1654/_index.html
    var url = new NSUrl(imageFilename, false);
    CGImageSource myImageSource;
    myImageSource = CGImageSource.FromUrl (url, null);
    var ns = new NSDictionary();
    var imageProperties = myImageSource.CopyProperties(ns, 0);
    // Output ALL teh things
    //Console.WriteLine(imageProperties.DescriptionInStringsFileFormat);

    // Basic Properties
    var width = imageProperties[CGImageProperties.PixelWidth];
    var height = imageProperties[CGImageProperties.PixelHeight];
    var orientation = imageProperties[CGImageProperties.Orientation];
    var dimensions = String.Format ("Dimensions: {0}x{1} (orientation {2})", width, height, orientation);
    Console.WriteLine(dimensions);

    // TIFF Properties
    var tiff = imageProperties.ObjectForKey(CGImageProperties.TIFFDictionary) as NSDictionary;
    var make = tiff[CGImageProperties.TIFFMake];
    var model = tiff[CGImageProperties.TIFFModel];
    var dt = tiff[CGImageProperties.TIFFDateTime];
    var tprops = String.Format ("TIFF: {0} {1} {2}", make, model, dt);
    Console.WriteLine(tprops);

    // GPS Properties
    var gps = imageProperties.ObjectForKey(CGImageProperties.GPSDictionary) as NSDictionary;
    var lat = gps[CGImageProperties.GPSLatitude];
    var latref = gps[CGImageProperties.GPSLatitudeRef];
    var lon = gps[CGImageProperties.GPSLongitude];
    var lonref = gps[CGImageProperties.GPSLongitudeRef];
    var loc = String.Format ("GPS: {0} {1}, {2} {3}", lat, latref, lon, lonref);
    Console.WriteLine(loc);
    // http://stackoverflow.com/questions/4043685/problem-in-writing-metadata-to-image

    // EXIF Properties
    var exif = imageProperties.ObjectForKey(CGImageProperties.ExifDictionary) as NSDictionary;
    var fn = exif[CGImageProperties.ExifFNumber];
    var focal = exif[CGImageProperties.ExifFocalLength];
    var eprops = String.Format ("EXIF: Fstop {0} FocalLength {1}", fn, focal);
    Console.WriteLine(eprops);


    // Now create UI controls to display this stuff
    imageView = new UIImageView(new RectangleF(0,0,320,240));
    output = new UITextView(new RectangleF(0,235,320,180));
    overlabel = new UILabel(new RectangleF(0, 0, 220, 60));

    imageView.Image = UIImage.FromFile(imageFilename);
    output.Text = imageProperties.DescriptionInStringsFileFormat;
    output.Editable = false;
    output.ScrollEnabled = true;
    overlabel.TextColor = UIColor.White;
    overlabel.BackgroundColor = UIColor.Clear;
    overlabel.Font = UIFont.SystemFontOfSize(10f);
    overlabel.Lines = 4;
    overlabel.Text = dimensions + "\n" + loc + "\n" + tprops + "\n" + eprops;

    View.AddSubview (imageView);
    View.AddSubview (output);
    View.AddSubview (overlabel);
    }
    }
    }