// 解决滑动视图顶部空出状态栏高度的问题
self.extendedLayoutIncludesOpaqueBars = YES;
if (@available(iOS 11.0, *)) {
self.tableView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
} else {
self.automaticallyAdjustsScrollViewInsets = NO;
}








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