uniapp-x项目在ios离线打包后，camera的撒嘛不返回扫码结果

ios离线打包，<camera class="camera" flash="auto" device-position="back" mode="scanCode" resolution="high"  
            @initdone="handleInit" @error="handleError" @scancode="handleScan"></camera>相机组件扫码，const handleError = (e : UniCameraErrorEvent) => {  
        console.log("扫码error", e.detail);  
    }  
    const handleInit = () => {  
        console.log('扫码初始化成功')  
    }  
    const handleScan = (e : UniCameraScanCodeEvent) => {  
        console.log("scan result",e)  
        const detail = e.detail  
        if (detail.type == "QR_CODE") {  
            const result = detail.result  
            const reg = /n=([^&]*)/;  
            const match = result?.match(reg);  
            const imei = (match != null && match.length >= 1) ? match[1] : '';  
            if (imei == "") {  
                tip("无效的二维码", () => { }, 1500)  
            } else {  
                goto('pages/cabin/index?imei=' + imei, 'redirect', null)  
            }  
        }  
    }

handleInit能输出，但是scancode一直获取不到数据，handleScan不执行