- (void)viewDidLoad {
    [super viewDidLoad];
    [self.button setImage:[self imageFromSystemBarButton:UIBarButtonSystemItemTrash]
                 forState:UIControlStateNormal];
    self.button.tintColor = [UIColor redColor];
- (UIImage *)imageFromSystemBarButton:(UIBarButtonSystemItem)systemItem {
    // Holding onto the oldItem (if any) to set it back later
    // could use left or right, doesn't matter
    UIBarButtonItem *oldItem = self.navigationItem.rightBarButtonItem;
    UIBarButtonItem *tempItem = [[UIBarButtonItem alloc]
                                 initWithBarButtonSystemItem:systemItem
                                 target:nil
                                 action:nil];
    // Setting as our right bar button item so we can traverse its subviews
    self.navigationItem.rightBarButtonItem = tempItem;
    // Don't know whether this is considered as PRIVATE API or not
    UIView *itemView = (UIView *)[self.navigationItem.rightBarButtonItem performSelector:@selector(view)];
    UIImage *image = nil;
    // Traversing the subviews to find the ImageView and getting its image
    for (UIView *subView in itemView.subviews) {
        if ([subView isKindOfClass:[UIImageView class]]) {
            image = ((UIImageView *)subView).image;
            break;