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POMac Dev - Image I/O
 

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    <p>my first question here.</p> <p>I am trying to create a simple application which takes in a picture from one location, and places it to the desktop. The problem I'm having is this error:</p> <pre><code>2012-10-27 10:49:16.405 saveFile[3271:303] +[__NSCFConstantString scheme]: unrecognized selector sent to class 0x7fff73c01e38 2012-10-27 10:49:16.406 saveFile[3271:303] +[__NSCFConstantString scheme]: unrecognized selector sent to class 0x7fff73c01e38 </code></pre> <p>On this line:</p> <pre><code>CGImageRef imageItself = CGImageSourceCreateImageAtIndex(myImageSource, 0, NULL); </code></pre> <p>And here's the actual code:</p> <p>Header file:</p> <pre><code>#import &lt;Cocoa/Cocoa.h&gt; //NSOpenPanel = use finder NSOpenPanel *openPanel; //URL is the directory NSURL* theDoc; //Don't allow bottom button to malfunction by being clicked early. bool topButtonClicked = NO; @interface saveFileAppDelegate : NSObject &lt;NSApplicationDelegate&gt; - (IBAction)moveFile:(id)sender; - (IBAction)chooseFile:(id)sender; @property (nonatomic, retain) IBOutlet NSTextField *label; @property (assign) IBOutlet NSWindow *window; @end </code></pre> <p>.m file:</p> <pre><code>#import "saveFileAppDelegate.h" @implementation saveFileAppDelegate - (void)applicationDidFinishLaunching:(NSNotification *)aNotification { // Insert code here to initialize your application } - (IBAction)chooseFile:(id)sender { openPanel = [NSOpenPanel openPanel]; [openPanel beginWithCompletionHandler:^(NSInteger result){ if (result == NSFileHandlingPanelOKButton) { theDoc = [[openPanel URLs] objectAtIndex:0]; [_label setStringValue:[NSString stringWithFormat:@"%@",theDoc]]; // Open the document. topButtonClicked = YES; } } ]; } - (IBAction)moveFile:(id)sender { if (topButtonClicked == YES) { //Take in picture CGImageSourceRef myImageSource = CGImageSourceCreateWithURL((__bridge CFURLRef)(theDoc), NULL); //CGImageRef myImage = CGImageSourceCreateImageAtIndex(myImageSource,0,NULL); //Save picture to desktop //Save where I wish to save the file CFURLRef desktopURL = (CFURLRef)@"/Users/Ken/Desktop/"; //Save where I want to save, the type of file I expect to save, number of images to save, any additional options. CGImageDestinationRef whereToSave = CGImageDestinationCreateWithURL(desktopURL, kUTTypeJPEG, 1, NULL); //Create a reference to the image itself, take in the image read, which image (only one, so 0), and additional options. CGImageRef imageItself = CGImageSourceCreateImageAtIndex(myImageSource, 0, NULL); //Begin final preperations, pull altogether desktop URL, the image read in before, and additional options. CGImageDestinationAddImage (whereToSave, imageItself, NULL); //Finalize (write the file) CGImageDestinationFinalize(whereToSave); //CGImageDestinationRef saveImageToDesktop (CFURLRef desktop, CFStringRef jpeg, size_t count, CFDictionaryRef NULL); } else{ /* open an alert with an OK button */ NSAlert *alert = [[NSAlert alloc] init]; [alert setMessageText:@"Stop it."]; [alert runModal]; } } void CGImageDestinationAddImage (CGImageDestinationRef idst, CGImageRef image, CFDictionaryRef properties); @end </code></pre>
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