我遇到以下错误时遇到了困难：
无法编组Objective-C对象0x17109780（类型： SMBSC_iOS_EddystoneManagerDelegate）。找不到现有的 此对象的托管实例，也无法创建新对象 托管实例（因为类型 'SMBSC.iOS.EddystoneManagerDelegate'没有构造函数 采用一个IntPtr参数。）
我已添加了它正在寻找的构造函数，但应用程序仍然因此错误而崩溃。
我正在使用Kontakt Xamarin component。
我正在创建一个包含以下行的新扫描：
manager = new KTKEddystoneManager(new EddystoneManagerDelegate() { ScanID = ID });
以下是导致错误的委托：
public class EddystoneManagerDelegate : KTKEddystoneManagerDelegate
{
public static int closestRssi { get; set; }
public static string closestInstance { get; set; }
public int ScanID { get; set; }
public EddystoneManagerDelegate()
{
}
public EddystoneManagerDelegate(IntPtr handle) : base(handle)
{
}
public override void DidFailToStartDiscovery(KTKEddystoneManager manager, NSError error)
{
Console.WriteLine("Eddystone discovery failed with error: " + error.Description);
}
public override void DidUpdateEddystone(KTKEddystoneManager manager, KTKEddystone eddystone, KTKEddystoneFrameType frameType)
{
string bkpnt = "";
}
public override void DidDiscoverEddystones(KTKEddystoneManager manager, NSSet<KTKEddystone> eddystones, KTKEddystoneRegion region)
{
try
{
Console.WriteLine("");
Console.WriteLine("------------------------------------------------------------------------");
Console.WriteLine("------------------------------------------------------------------------");
Console.WriteLine("------------------------------------------------------------------------");
int i = 0;
foreach (SavedPoint p in App.discoveredBeaconList)
{
i += 1;
Console.WriteLine("Existing Beacon List: " + p.BeaconInstanceID + " - " + p.BeaconTruckDesc + " - " + p.RSSI);
}
if (App.closestBeaconForTracking != null)
{
Console.WriteLine("Selected Beacon Before Logic: " + App.closestBeaconForTracking.instanceID + " RSSI: " + App.closestBeaconForTracking.RSSI);
}
else
{
Console.WriteLine("Selected Beacon Before Logic: no beacon selected");
}
App.singleOutputValue = "";
Console.WriteLine("Discovered " + eddystones.Count + " eddystones");
App.beaconTimer = DateTime.Now;
App.trackingBeaconTimer = DateTime.Now;
MessagingCenter.Send<App>(App.instance, "Output");
if (eddystones.Count == 1)
{
TimeSpan span = DateTime.Now - EddystoneiOS.StartTime;
Console.WriteLine("First Stone found in " + span.TotalSeconds + " seconds");
App.outputValue += " First Stone found in " + span.TotalSeconds + " seconds; " + ScanID + "; " + DateTime.Now.ToString("HH:mm:ss") + Environment.NewLine;
MessagingCenter.Send<App>(App.instance, "Output");
}
else if (eddystones.Count == 2)
{
TimeSpan span = DateTime.Now - EddystoneiOS.StartTime;
Console.WriteLine("Second Stone found in " + span.TotalSeconds + " seconds");
App.outputValue += " Second Stone found in " + span.TotalSeconds + " seconds; " + ScanID + "; " + DateTime.Now.ToString("HH:mm:ss") + Environment.NewLine;
MessagingCenter.Send<App>(App.instance, "Output");
}
else if (eddystones.Count == 3)
{
TimeSpan span = DateTime.Now - EddystoneiOS.StartTime;
Console.WriteLine("Third Stone found in " + span.TotalSeconds + " seconds");
App.outputValue += " Third Stone found in " + span.TotalSeconds + " seconds; " + ScanID + "; " + DateTime.Now.ToString("HH:mm:ss") + Environment.NewLine;
MessagingCenter.Send<App>(App.instance, "Output");
}
else if (eddystones.Count == 4)
{
TimeSpan span = DateTime.Now - EddystoneiOS.StartTime;
Console.WriteLine("Fourth Stone found in " + span.TotalSeconds + " seconds");
App.outputValue += " Fourth Stone found in " + span.TotalSeconds + " seconds; " + ScanID + "; " + DateTime.Now.ToString("HH:mm:ss") + Environment.NewLine;
MessagingCenter.Send<App>(App.instance, "Output");
}
App.closestBeaconForTracking = null;
foreach (var stone in eddystones)
{
KTKEddystone eddystone = (KTKEddystone)stone;
Console.WriteLine(eddystone.RSSI + ", " + eddystone.EddystoneUID.InstanceID);
App.outputValue += " " + eddystone.RSSI + ", " + ScanID + "; " + eddystone.EddystoneUID.InstanceID + Environment.NewLine;
App.instanceID = eddystone.EddystoneUID.InstanceID;
App.NameSpaceID = eddystone.EddystoneUID.NamespaceID;
App.rssi = eddystone.RSSI.Int32Value;
App.BeaconCount = (int)eddystones.Count;
App.lastBeaconTime = DateTime.Now.ToString();
if (App.isViewingBeacons)
{
MessagingCenter.Send<App>(App.instance, "StoneForBeaconList");
}
MapApp.Beacon beacon = App.Database.GetBeaconByID(eddystone.EddystoneUID.InstanceID.ToLower(), eddystone.EddystoneUID.NamespaceID.ToUpper());
if (beacon != null)
{
beacon.RSSI = eddystone.RSSI.Int32Value;
SavedPoint point = new SavedPoint() { BeaconID = beacon.BeaconID, BeaconInstanceID = beacon.instanceID, BeaconName = beacon.Name, BeaconNameSpaceID = beacon.namespaceID, RSSI = beacon.RSSI, BeaconTruckDesc = beacon.truckDesc };
point.LastSeenTime = DateTime.Now;
if (App.discoveredBeaconList == null)
{
App.discoveredBeaconList = new List<SavedPoint>();
}
if (!App.discoveredBeaconList.Exists(x => x.BeaconInstanceID == point.BeaconInstanceID) && beacon.RSSI != 0)
{
App.discoveredBeaconList.Add(point);
}
else
{
foreach (SavedPoint p in App.discoveredBeaconList)
{
if (p.BeaconInstanceID == point.BeaconInstanceID && beacon.RSSI != 0)
{
p.LastSeenTime = DateTime.Now;
p.RSSI = point.RSSI;
}
}
}
}
if (eddystone.RSSI.Int32Value != 0)
{
if (string.IsNullOrWhiteSpace(App.closestBeaconOutput))
{
App.closestBeaconOutput = eddystone.EddystoneUID.InstanceID + " " + eddystone.RSSI;
closestRssi = (int)eddystone.RSSI;
closestInstance = (string)eddystone.EddystoneUID.InstanceID;
MessagingCenter.Send<App>(App.instance, "topOutput");
}
if (closestInstance == eddystone.EddystoneUID.InstanceID)
{
App.closestBeaconOutput = eddystone.EddystoneUID.InstanceID + " " + eddystone.RSSI;
closestRssi = (int)eddystone.RSSI;
closestInstance = (string)eddystone.EddystoneUID.InstanceID;
MessagingCenter.Send<App>(App.instance, "topOutput");
}
if ((int)eddystone.RSSI > closestRssi)
{
App.closestBeaconOutput = eddystone.EddystoneUID.InstanceID + " " + eddystone.RSSI;
closestRssi = (int)eddystone.RSSI;
closestInstance = (string)eddystone.EddystoneUID.InstanceID;
MessagingCenter.Send<App>(App.instance, "topOutput");
}
//if(App.closestBeaconForTracking == null)
//{
// App.closestBeaconForTracking = App.Database.GetBeaconByID(eddystone.EddystoneUID.InstanceID.ToLower(), eddystone.EddystoneUID.NamespaceID.ToUpper());
// if(App.closestBeaconForTracking != null)
// {
// App.closestBeaconForTracking.RSSI = (int)eddystone.RSSI;
// }
//}
//if (App.closestBeaconForTracking != null)
//{
// if (App.closestBeaconForTracking.instanceID.ToLower() == eddystone.EddystoneUID.InstanceID && App.closestBeaconForTracking.namespaceID.ToLower() == eddystone.EddystoneUID.NamespaceID)
// {
// App.closestBeaconForTracking.RSSI = (int)eddystone.RSSI;
// }
// if (eddystone.RSSI.Int32Value > App.closestBeaconForTracking.RSSI)
// {
// App.closestBeaconForTracking = App.Database.GetBeaconByID(eddystone.EddystoneUID.InstanceID.ToLower(), eddystone.EddystoneUID.NamespaceID.ToUpper());
// if (App.closestBeaconForTracking != null)
// {
// App.closestBeaconForTracking.RSSI = (int)eddystone.RSSI;
// }
// }
//}
}
SavedPoint flipPoint = new SavedPoint();
//if(App.discoveredBeaconList.Count > 1)
//{
// try
// {
// if (App.discoveredBeaconList[0].BeaconInstanceID != App.closestBeaconForTracking.instanceID)
// {
// App.discoveredBeaconList.Insert(1, App.discoveredBeaconList[1]);
// App.discoveredBeaconList[0].BeaconInstanceID = App.closestBeaconForTracking.instanceID;
// App.discoveredBeaconList[0].BeaconNameSpaceID = App.closestBeaconForTracking.namespaceID;
// App.discoveredBeaconList[0].BeaconID = App.closestBeaconForTracking.BeaconID;
// App.discoveredBeaconList[0].RSSI = App.closestBeaconForTracking.RSSI;
// }
// }
// catch (Exception ex)
// {
// throw new Exception("Error in App.discoveredBeaconList.Count > 1");
// }
//}
//if(App.discoveredBeaconList.Count > 1)
//{
// if(App.discoveredBeaconList[0].RSSI > App.closestBeaconForTracking.RSSI)
// {
// App.closestBeaconForTracking.instanceID = App.discoveredBeaconList[0].BeaconInstanceID;
// App.closestBeaconForTracking.namespaceID = App.discoveredBeaconList[0].BeaconNameSpaceID;
// App.closestBeaconForTracking.RSSI = App.discoveredBeaconList[0].RSSI;
// App.closestBeaconForTracking.truckDesc = App.discoveredBeaconList[0].BeaconTruckDesc;
// }
//}
App.singleOutputValue += eddystone.EddystoneUID.InstanceID + " " + eddystone.RSSI.Int32Value + "; ";
}
if (App.discoveredBeaconList.Count > 0)
{
SavedPoint topBeacon = App.discoveredBeaconList.OrderByDescending(c => c.RSSI).First();
MapApp.Beacon convertedBeacon = new MapApp.Beacon();
convertedBeacon.RSSI = topBeacon.RSSI;
convertedBeacon.Name = topBeacon.BeaconName;
convertedBeacon.namespaceID = topBeacon.BeaconNameSpaceID;
convertedBeacon.instanceID = topBeacon.BeaconInstanceID;
convertedBeacon.BeaconID = topBeacon.BeaconID;
convertedBeacon.truckDesc = topBeacon.BeaconTruckDesc;
App.closestBeaconForTracking = convertedBeacon;
}
if (App.closestBeaconForTracking != null)
{
Console.WriteLine("Selected Beacon: " + App.closestBeaconForTracking.instanceID + " RSSI: " + App.closestBeaconForTracking.RSSI);
MapApp.Beacon beacon = App.Database.GetBeaconByID(App.closestBeaconForTracking.instanceID, App.closestBeaconForTracking.namespaceID);
if(!string.IsNullOrWhiteSpace(beacon.truckDesc))
{
App.catchTruckDesc = beacon.truckDesc;
//Insights.Identify(App.catchTruckDesc);
}
}
else
{
Console.WriteLine("Selected Beacon: no beacon selected");
}
Console.WriteLine("------------------------------------------------------------------------");
Console.WriteLine("------------------------------------------------------------------------");
Console.WriteLine("------------------------------------------------------------------------");
Console.WriteLine("");
//if (App.closestBeaconForTracking != null && !string.IsNullOrWhiteSpace(App.closestBeaconForTracking.instanceID))
//{
// App.singleOutputValue = "Beacon found at: " + DateTime.Now + Environment.NewLine + App.closestBeaconForTracking.instanceID + " " + App.closestBeaconForTracking.RSSI;
//}
MessagingCenter.Send<App>(App.instance, "singleOutput");
MessagingCenter.Send<App>(App.instance, "UpdateStartText");
MessagingCenter.Send<App>(App.instance, "Output");
}
catch (Exception ex)
{
if (string.IsNullOrWhiteSpace(App.catchFieldDesc))
{
App.catchFieldDesc = "Null";
}
if (string.IsNullOrWhiteSpace(App.catchTruckDesc))
{
App.catchTruckDesc = "Null";
}
Insights.Report(ex, new Dictionary<string, string>() { { "DidDiscoverEddystone", ex.StackTrace }, { "Field Description", App.catchFieldDesc }, { "Truck Description", App.catchTruckDesc } }, Insights.Severity.Critical);
}
}
我在互联网上做了一些搜索，但我没有发现任何与我的场景相关的内容。我确定我的代码有错误，但我不完全理解这个错误。
我已经读过这个错误可能是由Garbage Collector收集对象引起的。
这个错误究竟是什么意思，我可以看一下尝试修复？
谢谢！