_webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 20, self.view.frame.size.width, self.view.frame.size.height-20)]; _webView.delegate = self; _webView.scrollView.bounces = NO; / 添加 webiview [self.view addSubview:self.webView]; // 加载请求 // 1.URL NSURL *url = [NSURL URLWithString:HOME_URL]; // 2.创建请求 NSURLRequest *request = [NSURLRequest requestWithURL:url]; // 3.加载请求 [self.webView loadRequest:request];
//网页即将开始加载 - (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType; //网页开始加载 - (void)webViewDidStartLoad:(UIWebView *)webView; //网页加载完成 - (void)webViewDidFinishLoad:(UIWebView *)webView; //网页加载失败 - (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error; //UIWebView自带了一个方法, 可以直接调用JS代码(转化为string类型的js代码) - (nullable NSString *)stringByEvaluatingJavaScriptFromString:(NSString *)script; //例如修改id为‘html’标签内部的text属性 [web stringByEvaluatingJavaScriptFromString:@"document.getElementById('html').innerText='修改内容'"]; //也可以执行多行js代码 [web stringByEvaluatingJavaScriptFromString:@"var div = document.getElementById('html'); div.innerText = '修改内容'"];
一,js里面直接调用方法
方法1
1.png
代码如下
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType { NSLog(@"%@",request.URL ); if ([[request.URL absoluteString] hasPrefix:[NSString stringWithFormat:@"%@/stats/index?orgId=",PR_AppDotNetAPIBaseURLString]]) { [self menuLeftBarButton]; } else { [self setDefaultBackButton]; [self setRightButton]; } return YES; }
在这个网页即将加载的方法里面做一些网址的截取,可以做一些相应的处理,对某些特定的网址做不同的处理。至于返回YES 还是NO 就根据你们的需求做处理
方法2
2.png
在网页加载完成之后使用苹果推荐的JavaScriptCore
2.png
对于有参数传递的也是有两种方法获取,详细见图
4.png
代码如下
- (void)webViewDidFinishLoad:(UIWebView *)webView { if ([[webView.request.URL absoluteString] hasPrefix:[NSString stringWithFormat:@"%@/stats/index?orgId=",PR_AppDotNetAPIBaseURLString]]) { self.title = @"我的机构"; } else { self.title = [webView stringByEvaluatingJavaScriptFromString:@"document.title"]; } if ([[webView.request.URL absoluteString] hasPrefix:[NSString stringWithFormat:@"%@/newstats/hot/",PR_AppDotNetAPIBaseURLString]]) { [self touchToDetail]; } [self invokeJS]; } - (void)invokeJS { JSContext *context = [self.webView valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"]; context[@"orgBuyCoin"] = ^() { BuyCoinViewController *vc = [[BuyCoinViewController alloc] initWithNibName:@"BuyCoinViewController" bundle:nil]; vc.whicePay = @"BCPay"; vc.productType = @"4"; vc.title = @"机构购买学币"; [self.navigationController pushViewController:vc animated:YES]; }; context[@"buyMembers"] = ^() { NSNumber *MemberCount = [[NSNumber alloc] init]; NSArray *args = [JSContext currentArguments]; MemberCount = (NSNumber *)args[0]; JSValue *this = [JSContext currentThis]; NSLog(@"this8888888888888: %@",this); NSLog(@"-------End Log-------"); BuyMembersViewController *vc = [[BuyMembersViewController alloc] initWithNibName:@"BuyMembersViewController" bundle:nil]; //返回的 NSLog(@"-----MemberCount:%@", MemberCount); vc.MemberCount = MemberCount; [self.navigationController pushViewController:vc animated:YES]; }; }
二,js里面通过对象调用方法 这里以微信和支付宝支付为例子 这里要借助 JSExport 可以制定一个协议
@protocol JSLivingDelegate <JSExport> /** * 支付宝支付 * * @param ali_pay_data 支付数据 * @param ali_order 订单 */ JSExportAs(ali_pay, - (void)ali_sub:(id)ali_pay_data order:(id)ali_order ); //微信支付 JSExportAs(wx_pay, - (void)wxpay_sub:(NSString *)appId nonceStr:(NSString *)nonceStr outTradeNo:(NSString *)outTradeNo package:(NSString *)package partnerid:(NSString *)partnerid paySign:(NSString *)paySign prepayid:(NSString *)prepayid signTyp:(NSString *)signTyp timeStamp:(NSString *)timeStamp ); @end 遵循协议实现对应的OC方法就行了
方法1
5.png
代码如下 iOS 7之前 [self.webView stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"addressCallBack('%@','%@','%@','%@');",provincecid,province,citycid,city]];
方法2
NSString * method = @"dolike"; JSValue * function = [self.context objectForKeyedSubscript:method]; //这里面的a,b,c就是OC调用JS的时候给JS传的参数 [function callWithArguments:@[a,b,c]];
self.webView = [[WKWebView alloc]initWithFrame:CGRectMake(0, 20, kScreenWidth, kScreenHeight-20) configuration:config]; self.webView.scrollView.bounces = NO; self.webView.UIDelegate = self; self.webView.navigationDelegate = self; NSURL *url = [NSURL URLWithString:string]; NSURLRequest *request = [NSURLRequest requestWithURL:url]; [self.webView loadRequest:request];
1 WKNavigationDelegate
// 页面开始加载时调用 - (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation; // 当内容开始返回时调用 - (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation; // 页面加载完成之后调用 - (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation; // 页面加载失败时调用 - (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation; 页面跳转的代理方法有三种,分为(收到跳转与决定是否跳转两种) // 接收到服务器跳转请求之后调用 - (void)webView:(WKWebView *)webView didReceiveServerRedirectForProvisionalNavigation: (WKNavigation *)navigation; // 在收到响应后,决定是否跳转 - (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler; // 在发送请求之前,决定是否跳转 - (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler;
2 WKUIDelegate
-(WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures; / 界面弹出警告框 - (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(void (^)())completionHandler; // 界面弹出确认框 - (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL result))completionHandler; // 界面弹出输入框 - (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(nullable NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString * __nullable result))completionHandler;
3 WKScriptMessageHandler
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message;
也可以截取网址这里就不在累述 在创建web的时候 self.webView = [[WKWebView alloc]initWithFrame:CGRectMake(0, 20, kScreenWidth, kScreenHeight-20) configuration:config]; 配置 config 对js 的方法进行类似注册的操作
WKWebViewConfiguration *config = [WKWebViewConfiguration new]; //初始化偏好设置属性:preferences config.preferences = [WKPreferences new]; //The minimum font size in points default is 0; config.preferences.minimumFontSize = 10; //是否支持JavaScript config.preferences.javaScriptEnabled = YES; //不通过用户交互,是否可以打开窗口 config.preferences.javaScriptCanOpenWindowsAutomatically = NO; [config.userContentController addScriptMessageHandler:self name:@"AppModel"]; [config.userContentController addScriptMessageHandler:self name:@"ConfirmAccepts"]; [config.userContentController addScriptMessageHandler:self name:@"ChuanPhone"];
然后在代理做对应的处理和参数的接收
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message { NSLog(@"%@",NSStringFromSelector(_cmd)); NSLog(@"%@",message.body); if ([message.name isEqualToString:@"AppModel"]) { [self showMsg:@"我收到js的AppModel"]; } if ([message.name isEqualToString:@"ConfirmAccepts"]) { NSString *info = [NSString stringWithFormat:@"你好 %@, 很高兴见到你",message.body]; [self showMsg:info]; } if ([message.name isEqualToString:@"ChuanPhone"]) { NSArray *array = message.body; NSString *info = [NSString stringWithFormat:@"这是我的手机号: %@, %@ !!",array.firstObject,array.lastObject]; [self showMsg:info]; } }
//方法 setName [webView evaluateJavaScript:@"setname('张三')" completionHandler:nil]; //此处 setname为JS定义的方法名, 内部 ‘张三’为传给JS的参数。 如果setname方法需要传入一个json或者array等非字符参数, 需要用format方法将其转为string类型,在调用evaluate方法。例如 NSString * para = [NSString stringWithFormat:@"setname('%@')",json];
希望能够帮助你,有什么问题欢迎留言。
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