一 :oc registerHandler 注册方法 js端直接调用 , js注册 方法OC代码直接调用
// OC端通过responseCallback回调JS端，JS就可以得到所需要的数据
[self.bridge registerHandler:@"getUserIdFromObjC" handler:^(id data, WVJBResponseCallback responseCallback) {
NSLog(@"js call getUserIdFromObjC, data from js is %@", data);
if (responseCallback) {
// 反馈给JS
responseCallback(@{@"userId": @"123456"});
}
}];
[self.bridge registerHandler:@"getBlogNameFromObjC" handler:^(id data, WVJBResponseCallback responseCallback) {
NSLog(@"js call getBlogNameFromObjC, data from js is %@", data);
if (responseCallback) {
// 反馈给JS
responseCallback(@{@"blogName": @"技术博客"});
}
}];
[self.bridge callHandler:@"getUserInfos" data:@{@"name": @"标哥"} responseCallback:^(id responseData) {
NSLog(@"from js: %@", responseData);
}];
/*这段代码是固定的，必须要放到js中*/
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)
}
/*与OC交互的所有JS方法都要放在此处注册，才能调用通过JS调用OC或者让OC调用这里的JS*/
setupWebViewJavascriptBridge(function(bridge) {
var uniqueId = 1
function log(message, data) {
var log = document.getElementById('log')
var el = document.createElement('div')
el.className = 'logLine'
el.innerHTML = uniqueId++ + '. ' + message + ':<br/>' + JSON.stringify(data)
if (log.children.length) {
log.insertBefore(el, log.children[0])
} else {
log.appendChild(el)
}
}
/* Initialize your app here */
/*我们在这注册一个js调用OC的方法，不带参数，且不用ObjC端反馈结果给JS：打开本demo对应的博文*/
bridge.registerHandler('openWebviewBridgeArticle', function() {
log("openWebviewBridgeArticle was called with by ObjC")
})
/*JS给ObjC提供公开的API，在ObjC端可以手动调用JS的这个API。接收ObjC传过来的参数，且可以回调ObjC*/
bridge.registerHandler('getUserInfos', function(data, responseCallback) {
log("Get user information from ObjC: ", data)
responseCallback({'userId': '123456', 'blog': '标哥的技术博客'})
})
二 :bridge 可以使用js全局变量G_IOS_BRIDGE保存 前提得在调用bridge.init方法内给G_IOS_BRIDGE赋值
<script>
window.onerror = function(err) {
log('window.onerror: ' + err)
}
var G_IOS_BRIDGE = null;
try {
function connectWebViewJavascriptBridge(callback) {
if (window.WebViewJavascriptBridge) {
callback(WebViewJavascriptBridge);
} else {
document.addEventListener("WebViewJavascriptBridgeReady", function () {
callback(WebViewJavascriptBridge)
}, false)
}
}
connectWebViewJavascriptBridge(function (bridge) {
bridge.init(function (message, responseCallback) {
alert('init初始化接受的' + message);
var data = {'Javascript Responds': 'Wee!1111'};
responseCallback(data);
});
G_IOS_BRIDGE = bridge;
});
} catch (e) {
}
window.onload = function () {
document.getElementById('blogId').onclick = function (e) {
G_IOS_BRIDGE.callHandler('testObjcCallback', {'blogURL':
'http://www.henishuo.com'}, function(response) {
alert("2222" + response);
})
}
}
三:OC的bridge send方法 就会调用js的bridge.init()方法
// oc 代码
[_bridge send:@"A string sent from ObjC before Webview has loaded." responseCallback:^(id responseData) {
NSLog(@"objc got response! %@", responseData);
}];
//OC bridge.send 方法过来的 就会调用到js这个方法
bridge.init(function(message, responseCallback) {
})
四:js的bridge send方法 就会调用OC的[WebViewJavascriptBridge bridgeForWebView:]初始化方法
//js代码
connectWebViewJavascriptBridge(function (bridge) {
bridge.init(function (message, responseCallback) {
alert('init初始化接受的' + message);
var data = {'Javascript Responds': 'Wee!1111'};
responseCallback(data);
});
bridge.send({ Foo:"Bar" }, function responseCallback(responseData) {
alert("js发送给OC的回应 " + responseData);
})
}）
//OC代码
_bridge = [WebViewJavascriptBridge bridgeForWebView:webView webViewDelegate:self handler:^(id data, WVJBResponseCallback responseCallback) {
NSLog(@"ObjC received message from JS: %@", data);
responseCallback(@"Response for message from ObjC");
}];
