uniapp引入外部js链接

	geturl(){
		let _self = this
		const url = [
		 'https://webrtc.github.io/adapter/adapter-latest.js',
		 'https://g.alicdn.com/cloudcallcenter/SIPml/0.6.1/SIPml-api.js',
		 'https://g.alicdn.com/cloudcallcenter-voip/web-agentbar-sdk/1.14.2/index.js',
		 'https://g.alicdn.com/cloudcallcenter/web-workbench-sdk/2.10.0/workbenchSdk.min.js',
	   ]
	   url.forEach(item => {
		 this.tool.addScript(item, function(){
		   _self.scriptLoad++
		   if(_self.scriptLoad === url.length) {
			 _self.openWbShow = true
		   }
		 });
	   })
	}

function addScript(url){
	var head = document.getElementsByTagName('head')[0];
	var script = document.createElement('script');
	script.type = 'text/javascript';
	script.src= url;
	head.appendChild(script);
}