1秸弛、WKWebView適配：
WKWebView顯示時有時會顯示不全，頂部會有空白區(qū)域。這時設(shè)置
if (@available(iOS 11.0, *)) {
wkWebview.scrollView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
} else {
// Fallback on earlier versions
}
>>>>> ?wkWebview.scrollView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever; ? 其實設(shè)置這個就可以了滞诺，然后xcode會提示自適配
