现在好的IOS 的 APP有时候会跟网页内容相关联,当然也是增加用户体验,及更好的,有效的体现APP 的功能。
由于本人在项目中会用到这部分功能,做下记录!
JS调用OC
很多应用里面或多或少的调用了网页,来达到绚丽的效果,所谓的JS调用OC.....举个例子吧,网页上有个按钮
点击按钮跳转界面,跳转的动作由OC的代码实现。
OC调用JS
还是举个例子,我们OC代码创建了输入框比如输入用户名,输入完成后显示在网页上,显示用户的用户名
一.利用webView的代理方法实现OC和JS的相互调用
创建属性
@property(nonatomic,strong)UIWebView * webView;
遵守webView的协议UIWebViewDelegate
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-( void )webViewLoad{
NSURL * url = [[NSURL alloc]initWithString:@ "http://www.baidu.com" ];
self.webView = [[UIWebView alloc]initWithFrame:self.view.bounds];
NSURLRequest * request = [[NSURLRequest alloc]initWithURL:url];
self.webView.delegate = self;
[self.webView loadRequest:request];
[self.view addSubview:self.webView];
}
//JS调用OC
-( BOOL )webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{
NSString * str = request.URL.relativeString;
if ([str isEqualToString:@ "http://www.baidu.com/" ]) {
NSLog(@ "来找度娘" );
}
return YES;
}
//OC调用JS
-( void )webViewDidFinishLoad:(UIWebView *)webView{
NSString * str = [self.webView stringByEvaluatingJavaScriptFromString:@ "document.getElementById(" "\"index-kw" "\").value=" "\"li" "\"" ];
NSLog(@ "webViewDidFinishLoad=%@" ,str);
}
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二.利用第三方的框架实现(需要你和html端的人统一方法的名称)
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-( void )webViewBridge{
self.webView = [[UIWebView alloc]initWithFrame:[UIScreen mainScreen].bounds];
NSString * path = [[NSBundle mainBundle]pathForResource:@ "ExampleApp.html" ofType:nil];
NSURL * url = [[NSURL alloc]initFileURLWithPath:path];
[self.webView loadRequest:[NSURLRequest requestWithURL:url]];
self.webView.delegate = self;
[self.view addSubview:self.webView];
//设置能够桥接
[WebViewJavascriptBridge enableLogging];
//设置桥接
self.bridge = [WebViewJavascriptBridge bridgeForWebView:self.webView];
//设置代理
[self.bridge setWebViewDelegate:self];
//JS调用OC(testObjcCallback是和html统一的方法名字)
[self.bridge registerHandler:@ "testObjcCallback" handler:^(id data, WVJBResponseCallback responseCallback) {
NSLog(@ "按钮点击了" );
self.view.backgroundColor= [UIColor blackColor];
responseCallback(@ "按钮点击了" );
}];
}
//OC调用JS
-( void )webViewDidFinishLoad:(UIWebView *)webView{
NSLog(@ "webViewDidFinishLoad" );
[self.bridge callHandler:@ "registerHandler" ];
}
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