<wx-open-launch-app class="open_app_wx" id="launch-btn" appid="your" extinfo="your-extinfo">
				template:
				<template class="open_app_tem">
					<style>
						.btn {
							width: 300px;
							height: 100px;
							background: #fff100;
							display: inline-block;
						}
					</style>
					<button class="btn">App内查看</button>
				</template>
			</wx-open-launch-app>