iOS webview和wkwebview

1..webVidew的方法

oc 调js

- (nullableNSString*)stringByEvaluatingJavaScriptFromString:(NSString*)script;

js 调oc

- (BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType

NSString*url = request.URL.absoluteString;if([url rangeOfString:@"[sxr://](hiya://)"].location !=NSNotFound) {// url的协议头是sxr

NSLog(@"sxr");returnNO;}returnYES;

通过框架JSContext注入进行交互

- (void)webViewDidFinishLoad:(UIWebView*)webView{ 
 JSContext *context = [webView valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"];//定义好JS要调用的方法，finish就是调用的方法名context[@"finish"] 
= ^() {
dispatch_async(dispatch_get_main_queue(), ^{
UIAlertView*alertView = [[UIAlertViewalloc] initWithTitle:@"方式二"message:@"这是OC原生的弹出窗"delegate:selfcancelButtonTitle:@"收到"otherButtonTitles:nil]; [alertView show];
 }); };}

2.wkwebview

首先使用WKWebView.你需要导入

#import <WebKit/WebKit.h>

然后初始化一个WKWebView,设置WKNavigationDelegate,并且执行WKNavigationDelegate的方法.在网页加载成功的时候,我们会调用一些JS代码对网页进行设置.

WKWebView本身提供一个方法进行处理JS代码.javaScriptString:所执行的JS代码
completionHandler:回调

oc 调js

[webView evaluateJavaScript:@"我是JS"completionHandler:^(id_Nullable response,NSError* _Nullable error) { }];

js 调oc

//在JS端调用alert函数时，会触发此代理方法

- (void)webView:(WKWebView*)webView runJavaScriptAlertPanelWithMessage:(NSString*)message initiatedByFrame:(WKFrameInfo*)frame completionHandler:(void(^)(void))completionHandler;//JS端调用confirm函数时，会触发此代理方法。
- (void)webView:(WKWebView*)webView runJavaScriptConfirmPanelWithMessage:(NSString*)message initiatedByFrame:(WKFrameInfo*)frame completionHandler:(void(^)(BOOLresult))completionHandler;//JS端调用prompt函数时，会触发此代理方法。
- (void)webView:(WKWebView*)webView runJavaScriptTextInputPanelWithPrompt:(NSString*)prompt defaultText:(nullableNSString*)defaultText initiatedByFrame:(WKFrameInfo*)frame completionHandler:(void(^)(NSString* _Nullable result))completionHandler;