1验证是否是微信内置浏览器

payParam = {

}

// 验证是否是微信内置浏览器
if (typeof WeixinJSBridge === 'undefined') {
	if (document.addEventListener) {
		document.addEventListener('WeixinJSBridgeReady', that.onBridgeReady(payParam),
			false)
	} else if (document.attachEvent) {
		document.attachEvent('WeixinJSBridgeReady', that.onBridgeReady(payParam))
		document.attachEvent('onWeixinJSBridgeReady', that.onBridgeReady(payParam))
	}
} else {
   //调取支付
	this.onBridgeReady(payParam)
}

2.调取微信支付

// 调微信支付
onBridgeReady(obj) {
WeixinJSBridge.invoke('getBrandWCPayRequest', {
		"appId": obj.appId,
		//公众号名称，由商户传入     
		"timeStamp": obj.timeStamp + '',
		//时间戳，自1970年以来的秒数     
		"nonceStr": obj.nonceStr,
		//随机串     
		"package": obj.package,
		"signType": obj.signType,
		//微信签名方式：     
		"paySign": obj.paySign
	},
	function(res)