Image picker (camera and Photo Library) snippet

imagepickersnippet

- (void)photoViewTapHandler:(UITapGestureRecognizer *)gesture {
    UIActionSheet *popupQuery = [[UIActionSheet alloc] initWithTitle:@"Picture Selection" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Take a photo", @"Choose from Photo Library", nil];
    popupQuery.actionSheetStyle = UIActionSheetStyleBlackOpaque;
    [popupQuery showInView:self.view];
}

-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
    if (buttonIndex == 0) {
        [self showCamera];
    } else if(buttonIndex == 1) {
        [self showPhotoPicker];
    }
}

- (void)showCamera {
    _imagePicker = [[UIImagePickerController alloc] init];
    _imagePicker.delegate = self;
    _imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
    _imagePicker.allowsEditing = YES;
    
   [self presentViewController:_imagePicker animated:YES completion:nil];
}

- (void)showPhotoPicker {
    _imagePicker = [[UIImagePickerController alloc] init];
    _imagePicker.delegate = self;
    _imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    _imagePicker.allowsEditing = YES;
    
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
        _imagePickerPopover = [[UIPopoverController alloc] initWithContentViewController:_imagePicker];
        [_imagePickerPopover presentPopoverFromRect:self.photoView.frame
                                             inView:self.view
                           permittedArrowDirections:UIPopoverArrowDirectionAny
                                           animated:YES];
    } else {
        [self presentViewController:_imagePicker animated:YES completion:nil];
    }
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad &&
            picker.sourceType == UIImagePickerControllerSourceTypePhotoLibrary) {
        [_imagePickerPopover dismissPopoverAnimated:YES];
    } else {
        [self dismissViewControllerAnimated:YES completion:nil];
    }   
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad &&
        picker.sourceType == UIImagePickerControllerSourceTypePhotoLibrary) {
        [_imagePickerPopover dismissPopoverAnimated:YES];
    } else {
        [self dismissViewControllerAnimated:YES completion:nil];
    }
    NSLog(@"Picked: %@", info);
    
    UIImage *selectedImage;
    UIImage *editedImage = [info valueForKey:UIImagePickerControllerOriginalImage];
    
    if(editedImage != nil) {
        selectedImage = editedImage;
    } else {
        selectedImage = [info valueForKey:UIImagePickerControllerOriginalImage];
    }

    //save the image to app directory
    NSData *pngData = UIImagePNGRepresentation(selectedImage);
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *folderPath = [paths objectAtIndex:0];
    NSString *filePath = [folderPath stringByAppendingPathComponent:@"avatar.png"]; 
    if([pngData writeToFile:filePath atomically:YES]) {
        // set the image
        [self.photoView setImage:[UIImage imageWithContentsOfFile:filePath]];        
    }
}