AXWebViewController is a webViewController to browse web content inside applications. It’s a lightweight controller on iOS platform based on WKWebView (UIWebView would be the base Kit under iOS 8.0). It added navigation tool bar to refresh, go back, go forward and so on. It support the navigation style on WeChat. It is a simple-using and convenient web view controller using inside applications.
ios7 crash because your macro __IPHONE_OS_VERSION_MAX_ALLOWED always works. Then new a WKWebView in ios7 and it will be nil.