利用Native.js向日历插入提醒事件，但是权限一直获取为undefined，但是app已经获得日历权限，这是什么原因

[eventDB requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError * _Nullable error) {  
..................  
}];

上面是OC代码
下面是Native.js代码

function saveE() {  
        var EventKit = plus.ios.importClass('EventKit');  
                var EKEventStore = plus.ios.importClass("EKEventStore");  
                var eventDB = new EKEventStore();  
        var granted = plus.ios.newObject("BOOL");  
        var error = plus.ios.newObject("NSError");  
        eventDB.requestAccessToEntityTypecompletion(0,function(granted,error){//方法1  
                        console.log('209'+granted);  
                        console.log('210'+error);  
            if(error) {  
                                console.log('211');  
                // display error message here   
            } else if(!granted) {  
                //被用户拒绝，不允许访问日历  
                                console.log('216');  
                // display access denied error message here  
            } else {  
                //创建事件  
                                var EKEvent = plus.ios.import("EKEvent");  
                                var event = EKEvent.eventWithEventStore(eventDB);  
                event.title = "测试写入日历事件";  
                event.location = "北京海淀";  

                //06.07 时间格式  
                var dateFormatter = plus.ios.newObject("NSDateFormatter");  
                plus.ios.invoke(dateFormatter, "setAMSymbol:", "AM");  
                plus.ios.invoke(dateFormatter, "setPMSymbol:", "PM");  
                plus.ios.invoke(dateFormatter, "setDateFormat:", "yyyy/MM/dd hh:mmaaa");  

                var date = plus.ios.newObject("NSDate");  
                var s = plus.ios.invoke(dateFormatter, "stringFromDate:", date);  
                console.log("----" + s);  

                //开始时间(必须传)  
                event.startDate = plus.ios.invoke(date, "dateByAddingTimeInterval:", 60 * 2);  
                //结束时间(必须传)  
                event.endDate = plus.ios.invoke(date, "dateByAddingTimeInterval:", 60 * 5 * 24);  

                //添加提醒  
                //第一次提醒  (几分钟后)  
                plus.ios.invoke(event, "addAlarm:", plus.ios.invoke("EKAlarm", "alarmWithRelativeOffset:", 60.0 * 1.0));  
                //第二次提醒  ()  
                //[event addAlarm:[EKAlarm alarmWithRelativeOffset:60.0f * -10.0f * 24]];  

                //06.07 add 事件类容备注  
                var str = plus.ios.newObject("NSString", "eventWithEventStore:", eventDB);  

                event.notes = plus.ios.newObject("NSString", "stringWithFormat:", "%@", "接受信息类容备注");  

                plus.ios.invoke(event, "setCalendar:", plus.ios.invoke(eventDB, "defaultCalendarForNewEvents:"));  

                var err = plus.ios.newObject("NSError");  
                plus.ios.invoke(eventDB, "saveEvent:span:error:", event, "EKSpanThisEvent", err);  
                                console.log("保存成功");  

            }  
        });  
}  

granted获取的值一直是undefined，这是什么原因呢