项目介绍：

WebViewJavascriptBridge是一个iOS/OSX桥梁，连接了Obj-C与UIWebViews/WebViews之间的传送信息。

安装（iOS&OSX）

用CocoaPods安装

将如下加入到你的podfile，然后运行 pod install 去安装

`pod 'WebViewJavascriptBridge', '~> 5.0'`

手动安装
将 WebViewJavascriptBridge 文件夹拖拽到你的项目中。

使用方法

1.import头文件，声明属性

#import "WebViewJavascriptBridge.h"
@property WebViewJavascriptBridge* bridge;

2.整合WebViewjavascriptBridge与UIWebView或者WebView

self.bridge = [WebViewJavascriptBridge bridgeForWebView:webView];

3，在ObjC注册一个处理器，然后调用一个JS处理器

[self.bridge registerHandler:@"ObjC Echo" handler:^(id data, WVJBResponseCallback responseCallback) { NSLog(@"ObjC Echo called with: %@", data); responseCallback(data);
}];
[self.bridge callHandler:@"JS Echo" responseCallback:^(id responseData) { NSLog(@"ObjC received response: %@", responseData);
}];

4.复制粘贴 setupWebViewJavascriptBridge 到你的JS

function setupWebViewJavascriptBridge(callback) { if (window.WebViewJavascriptBridge) { return callback(WebViewJavascriptBridge); } if (window.WVJBCallbacks) { return window.WVJBCallbacks.push(callback); } window.WVJBCallbacks = [callback]; var WVJBIframe = document.createElement('iframe'); WVJBIframe.style.display = 'none'; WVJBIframe.src = 'wvjbscheme://__BRIDGE_LOADED__'; document.documentElement.appendChild(WVJBIframe); setTimeout(function() { document.documentElement.removeChild(WVJBIframe) }, 0)
}

5.最后，调用 setupWebViewJavascriptBridge ，然后使用注册处理器与调用ObjC处理器的桥接：

setupWebViewJavascriptBridge(function(bridge) {

    /* Initialize your app here */

    bridge.registerHandler('JS Echo', function(data, responseCallback) {
        console.log("JS Echo called with:", data)
        responseCallback(data)
    })
    bridge.callHandler('ObjC Echo', {'key':'value'}, function responseCallback(responseData) {
        console.log("JS received response:", responseData)
    })
})

https://github.com/marcuswestin/WebViewJavascriptBridge