Camera and ActionSheet API of iPhone

click a button raise an actionsheet

- (IBAction)addPhoto:(id)sender {
 UIActionSheet *cameraSheet = [[UIActionSheet alloc] initWithTitle:nil 
                delegate:self 
             cancelButtonTitle:@"Cancel" 
              destructiveButtonTitle:nil 
             otherButtonTitles:@"TakePicture",@"ChooseFromLibrary",nil];
 cameraSheet.actionSheetStyle = UIActionSheetStyleBlackOpaque;
 [cameraSheet showInView:self.view];
 [cameraSheet release];
}

Delegation methods of ActionSheet

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
 if (buttonIndex == 0) {
  if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
   UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
   imagePicker.delegate = self;
   imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
   imagePicker.allowsEditing = YES;
   [self presentModalViewController:imagePicker animated:YES];
   [imagePicker release];
  } else {
   [actionSheet dismissWithClickedButtonIndex:buttonIndex animated:YES];
  }
 } else if (buttonIndex == 1) {
  UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
  imagePicker.delegate = self;
  imagePicker.allowsEditing = YES;
  
  if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]){
   imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
   [self presentModalViewController:imagePicker animated:YES];
   [imagePicker release];
  }
  
  else if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeSavedPhotosAlbum]){
   imagePicker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
   [self presentModalViewController:imagePicker animated:YES];
   [imagePicker release];
  }
  
  else{
   [actionSheet dismissWithClickedButtonIndex:buttonIndex animated: YES];
  }
 }

}

Delegate methods of UIImagePickerControllerDelegate

#pragma mark -
#pragma mark UIImagePickerControllerDelegate Methods

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker  {
 [self dismissModalViewControllerAnimated:YES];
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)selectedImage editingInfo:(NSDictionary *)editingInfo {
 [self dismissModalViewControllerAnimated:YES];
}