how to know image picking in uiimagepicker?

how to know image picking in uiimagepicker and how to modify the picking image or how to call after image picking? and h开发者_开发百科ow to get the picking image as background image for next view using xcode for iphone?

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You can refer UIImagePickercontroller and use the UIImagePickerController's delegate methods UIImagePickerDelegate

     - (void)imagePickerController:(UIImagePickerController  *)picker didFinishPickingMediaWithInfo:(NSDictionary  *)info
{
// Get the image picked by the image picker
UIImage *image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
//Do something
}

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Use the UIImagePickerController's delegate methods:

- (void)imagePickerController:(UIImagePickerController *)pickerdidFinishPickingMediaWithInfo:(NSDictionary *)info {

   // Get the image picked by the image picker
   UIImage *image :[info objectForKey:@"UIImagePickerControllerOriginalImage"] ;
   //Do something
   [picker dismissModalViewControllerAnimated:YES];
}

Or I am sure this link may be helpful to you:

http://www.icodeblog.com/2009/07/28/getting-images-from-the-iphone-photo-library-or-camera-using-uiimagepickercontroller/