plus.runtime.openURL iOS app无法打开支付宝小程序

if (uni.getSystemInfoSync().platform == 'ios') {
authUrl = alipay://platformapi/startapp?appId=2021004100669981;
let params = encodeURIComponent(
'?id=' + that.opt.id + '&tourl=' + that.tourl + '&apppay=1' + '&orderid=' +
that.opt.orderid + '&apptoken=' + app.globalData.cashierToken
);
authUrl = ${authUrl}&page=pages/pay/pay${params};
plus.runtime.openURL(authUrl);
}