orderStr参数如下： 

my.tradePay({
						orderStr:res, // 完整的支付参数拼接成的字符串，从 alipay.fund.auth.order.app.freeze 接口获取
						success: (res) => {
							console.log('免押成功');
							console.log(JSON.stringify(res),'不是JOSN');
							console.log(JSON.stringify(res),'JSON');
							if (res.resultCode == 9000) {
								uni.redirectTo({
									url: '/pagesA/lease/lease?deviceNo=' + this.deviceNo +
										'&orderNo=' + orderNo
								})
							} else{
								uni.showToast({
									title:'免押失败',
									icon:'none'
								})
							}
						},
						fail: (res) => {
							console.log('免押失败');
							console.log(JSON.stringify(res),'不是JOSN');
							console.log(JSON.stringify(res),'JSON');
							uni.showToast({
								title:res.memo,
								icon:'none'
							})
						}
					});