问题
When I drag a UIWebView from the Object Library in Xcode, I get a UIWebView with this dark grey bar at the top:
What is that and how can I get rid of it?
回答1:
You need put self.automaticallyAdjustsScrollViewInsets = NO; in ViewDidLoad
The other choice is disable option Adjust Scroll View Insets in the .xib of your viewcontroller
回答2:
That dark grey color is the background color set for the UIWebView. This will show if a webpage is smaller than the frame of the web view. You won't see it if you change the background color to white or transparent.
回答3:
_webView.scrollView.contentInsetAdjustmentBehavior = .never
This should work if you have a WKWebView/UITableView/ScrollView. Add this in ViewDidLoad. This will make the status bar overlap the content without adding a extra white space in the status bar.
来源：https://stackoverflow.com/questions/41623507/grey-bar-on-top-of-uiwebview-in-ios-10