【转】适配iOS11 - UITableview UICollectionView MJRefresh下拉刷新错乱

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升级Xcode 9 + iOS 11后，发现原本没问题的collectionView和tableView像是中了风一样，头部刷新UI出现了错乱。

查阅发现 iOS11弃用了automaticallyAdjustsScrollViewInsets属性，新增contentInsetAdjustmentBehavior来替代它

关于 contentInsetAdjustmentBehavior

@available(iOS 11.0, *)
public enum UIScrollViewContentInsetAdjustmentBehavior : Int {
case automatic // Similar to .scrollableAxes, but will also adjust the top & bottom contentInset when the scroll view is owned by a view controller with automaticallyAdjustsScrollViewContentInset = YES inside a navigation controller, regardless of whether the scroll view is scrollable case scrollableAxes // Edges for scrollable axes are adjusted (i.e., contentSize.width/height > frame.size.width/height or alwaysBounceHorizontal/Vertical = YES)
case never // contentInset is not adjusted
case always // contentInset is always adjusted by the scroll view's safeAreaInsets
}

UIScrollViewContentInsetAdjustmentBehavior 是一个枚举类型,值有以下几种:

-automatic 和scrollableAxes一样,scrollView会自动计算和适应顶部和底部的内边距并且在scrollView 不可滚动时,也会设置内边距.

-scrollableAxes 自动计算内边距.
-never不计算内边距
-always 根据safeAreaInsets 计算内边距

很显然,我们这里要设置为 never

开始适配

OC 中

        //声明tableView的位置 添加下面代码
        if (@available(iOS 11.0, *)) {
            _tableView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
            _tableView.contentInset = UIEdgeInsetsMake(64, 0, 49, 0);
            _tableView.scrollIndicatorInsets = _tableView.contentInset;
        }

swift 中

        //声明tableView的位置 添加下面代码
        if #available(iOS 11.0, *) {
            tableView.contentInsetAdjustmentBehavior = .never
            tableView.contentInset = UIEdgeInsetsMake(64, 0, 49, 0)
            tableView.scrollIndicatorInsets = tableView.contentInset
        }

终于又回归原来的效果啦