IOS(swift) 11 UITableView 顶部间距 缝隙 处理方法

在viewDidLoad()中添加代码
所有tableview

if #available(iOS 11.0, *) {
        UIScrollView.appearance().contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentBehavior.never
    } else {
        // Fallback on earlier versions
    }

指定tableview

if #available(iOS 11.0, *) {
        tableView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentBehavior.never
    } else {
        // Fallback on earlier versions
    }