创建一个statusBar,设置高度为系统状态栏高度(uni.getSystemInfoSync().statusBarHeight)
// #ifdef APP-PLUS
var currentWebview = this.$scope.$getAppWebview()
setTimeout(function() {
wv = currentWebview.children()[0]
wv.setStyle({top:uni.getSystemInfoSync().statusBarHeight,height:300})
}, 1000); //如果是页面初始化调用时,需要延时一下
// #endif