头文件处理
#import <UIKit/UIKit.h> #if __IPHONE_OS_VERSION_MAX_ALLOWED < __IPHONE_8_0 #else #import <WebKit/WebKit.h> #endif
属性处理
@interface AdaptiveWebView ()<UIWebViewDelegate,WKNavigationDelegate> #if __IPHONE_OS_VERSION_MAX_ALLOWED < __IPHONE_8_0 @property WebViewJavascriptBridge* bridge; #else @property WKWebViewJavascriptBridge *bridge; #endif @end
代码处理
-(void)setUrl:(NSString *)url{ _url = url; NSURLRequest *urlRequest = [[NSURLRequest alloc]initWithURL:[NSURL URLWithString:url]]; #if __IPHONE_OS_VERSION_MAX_ALLOWED < __IPHONE_8_0 [self.webView loadRequest:urlRequest]; _bridge = [WebViewJavascriptBridge bridgeForWebView:self.webView]; [_bridge setWebViewDelegate:self]; #else [self.wkWebView loadRequest:urlRequest]; _bridge = [WKWebViewJavascriptBridge bridgeForWebView:self.wkWebView]; [_bridge setWebViewDelegate:self]; #endif @WeakObj(self)
#if __IPHONE_OS_VERSION_MAX_ALLOWED < __IPHONE_8_0
原文：http://www.cnblogs.com/songxing10000/p/5865660.html