Mobile Safari- the iOS SDK provides APIs for you to open a specific URL in the built-inMobile Safari browser. In this case, your users temporarily leave the application andswitch to Safari.
UIWebView / WKWebView- Before the release of iOS 9, this is the most convenient
way to embed web content in your app. You can think ofUIWebViewas a stripped-down
version of Safari. It is responsible to load a URL request and display the web content.
WKWebView, introduced in iOS 8, is an improved version ofUIWebView. It has the benefit of
the Nitro JavaScript engine and offers more features. If you just need to display a specific
web page,UIWebVieworWKWebViewis the best option for this scenario.
iOS 9 才有 SFSafariViewController- this is a new controller introduced in iOS 9. While
UIWebViewallows you embed web content in your apps, you have to build a custom web
view to offer a complete web browsing experience. For example,UIWebViewdoesn't come
with the Back/Forward button that lets users navigate back and forth the browsing
history. In order to provide the feature, you have to develop a custom web browser using
UIWebView. In iOS 9, Apple introducedSFSafariViewControllerto save developers from
creating our own web browser. By usingSFSafariViewController, your users can enjoy all
the features of Mobile Safari without leaving your apps.
