改变 UITableViewCell删除按钮样式

//配置删除按钮的颜色和大小
    for (UIView *subView in self.subviews) {
        if ([NSStringFromClass([subView class]) isEqualToString:@"UITableViewCellDeleteConfirmationView"]) {
            ((UIView *)[subView.subviews firstObject]).backgroundColor = [UIColor redColor];
            ((UIView *)[subView.superview.subviews firstObject]).backgroundColor = HMS_COLOR_BACK;
            ((UIView *)[subView.subviews firstObject]).frame = CGRectMake(0, 0, subView.frame.size.width, subView.frame.size.height-6);
        }
    }

（继承一个cell子类）