erişim kamerası?

Question

iphone'un kamerasına uiwebview'den erişmek mümkün mü? Biliyorum, phonegap bunu yapıyor, ancak telefon konuşması olmadan nasıl çalışır?

Teşekkürler.

Answer 1

UIWebView Temsilcisini uygulayabilir ve girişilen sayfa yükünü engelleyebilirsiniz. Özel bir URL belirleyerek, kamerayı başlatabilen Objective C'ye bir mesaj iletebilirsiniz. Web'e geri veri göndermek için yeni bir yükü (örneğimde yaptığım gibi) başlatabilir veya UIWebView üzerinde başka bir yöntem kullanarak bazı javascriptleri iletebilirsiniz. İşte

bir çalışma örneği, ben sadece yazdım:

#import "WebViewCamAppDelegate.h" 
    #import <UIKit/UIKit.h> 
    @interface uiwebviewcameraAppDelegate : NSObject <UIApplicationDelegate, UINavigationControllerDelegate, UIImagePickerControllerDelegate, UIWebViewDelegate> { 
     UIWindow *window; 
    UIViewController *viewController; 
    UIWebView *webView; 
    } 

    @property (nonatomic, retain) IBOutlet UIWindow *window; 

    @end 


    @implementation uiwebviewcameraAppDelegate 

    @synthesize window; 

    //This is the HTML we initially show in the WebView. Note the url "showcamera:" is one I 
    //invented with the intent to intercept it to show the camera. 
    static NSString *htmlString = @"<br><A href=\"showcamera:\">Show Camera</a>"; 


    //Pretty Basic stuff. We set the UIWebView Delegate so we can intercept the call and set up  //a ViewController so we can animate the UIImagePicker 
    - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {  
    viewController = [[UIViewController alloc] init]; 

    webView = [[UIWebView alloc] initWithFrame:window.bounds]; 
    [webView loadHTMLString:htmlString baseURL:nil]; 
    webView.delegate = self; 

    [viewController.view addSubview:webView]; 
    [window addSubview:viewController.view]; 
     [window makeKeyAndVisible]; 
    return YES; 
    } 

    //Note: I check to make sure the camera is available. If it is not (iPod touch or Simulator) I show the photo library instead. 
    -(void) showCamera { 
    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init]; 
    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) { 
     imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera; 
    } 
    else { 
     imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; 
    } 
    imagePicker.delegate = self; 
    [viewController presentModalViewController:imagePicker animated:YES]; 
    } 

    //Here we intercept any time the webview tries to load a document. When the user hits our "showcamera: url" we go to work. 
    - (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType { 
    if ([[[request URL] scheme] isEqualToString:@"showcamera"]) { 
     [self showCamera]; 
     return NO; 
    } 
    return YES; 
    } 

    //After the imagepicker has done it's thing, we pass the data back to the webview to be displayed. 
    //If we wanted to be fancy here, we could have done this via Javascript so we could dynamically insert an image without reloading the page. 
    - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { 
    [viewController dismissModalViewControllerAnimated:YES]; 
    UIImage* image = [info objectForKey:UIImagePickerControllerOriginalImage]; 
    NSData *imageData = UIImageJPEGRepresentation (image, 0.5); 
    [webView loadData:imageData MIMEType:@"image/jpeg" textEncodingName:@"UTF-8" baseURL:nil]; 
    } 


    - (void)dealloc { 
    [viewController release]; 
    [webView release]; 
     [window release]; 
     [super dealloc]; 
    } 

    @end