##發現問題 升級Xcode 9 + iOS 11後,發現本來沒問題的collectionView和tableView像是中了風同樣,頭部刷新UI出現了錯亂。 查閱發現 iOS11棄用了automaticallyAdjustsScrollViewInsets
屬性,新增contentInsetAdjustmentBehavior
來替代它git
關於 contentInsetAdjustmentBehavior
github
@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 } 複製代碼
UIScrollViewContentInsetAdjustmentBehavior 是一個枚舉類型,值有如下幾種:swift
-automatic
和scrollableAxes同樣,scrollView會自動計算和適應頂部和底部的內邊距而且在scrollView 不可滾動時,也會設置內邊距. -scrollableAxes
自動計算內邊距. -never
不計算內邊距 -always
根據safeAreaInsets 計算內邊距bash
很顯然,咱們這裏要設置爲 never
app
##開始適配 ####OC 中less
if (@available(iOS 11.0, *)){
_tableView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
_tableView.contentInset = UIEdgeInsetsMake(0, 0, 49, 0);//導航欄若是使用系統原生半透明的,top設置爲64
_tableView.scrollIndicatorInsets = _tableView.contentInset;
}
複製代碼
####swift 中ide
if #available(iOS 11.0, *) {
tableView.contentInsetAdjustmentBehavior = .never
tableView.contentInset = UIEdgeInsetsMake(0, 0, 49, 0)//導航欄若是使用系統原生半透明的,top設置爲64
tableView.scrollIndicatorInsets = tableView.contentInset
}
複製代碼
凡是Scrollview 及 Scrollview子類都會有適配問題,整個工程使用了無數Scrollview的你心理陰影面積必定不小,別擔憂,其實能夠一行代碼解決問題:ui
// AppDelegate 進行全局設置
if (@available(iOS 11.0, *)){
[[UIScrollView appearance] setContentInsetAdjustmentBehavior:UIScrollViewContentInsetAdjustmentNever];
}
複製代碼
####終於又迴歸原來的效果啦spa
更多代碼可參考 https://github.com/XuYang8026/UniversalProjectcode
以上屬於臭碼農原創,如有雷同屬巧合,若有錯誤望指正,轉載請標明來源和做者。 by:臭碼農