//解决上拉跳跃式加载问题
if (@available(iOS 11.0, *)) {
systemNotiTabelView.estimatedRowHeight = 0;
systemNotiTabelView.estimatedSectionFooterHeight = 0;
systemNotiTabelView.estimatedSectionHeaderHeight = 0;
systemNotiTabelView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
}