我正在构建一个Xamarin.iOS应用程序，我有一个带有自定义UITableViewCell的UITableView，当我从服务器向表中添加数据时，或者如果我开始快速向上和向下滚动，应用程序崩溃并给我这个错误日志： 本机堆栈跟踪：
>0 CardReader_iOS 0x003b5ed5 mono_handle_native_sigsegv + 260
>1 CardReader_iOS 0x003befad mono_sigsegv_signal_handler + 176
>2 libsystem_platform.dylib 0x3a600063 _sigtramp + 42
>3 CardReader_iOS 0x000d0798
CardReader_iOS_ICTableContactSource_GetCell_MonoTouch_UIKit_UITableView_MonoTouch_Foundation_NSIndexPath + 164
>4 CardReader_iOS 0x002740d0
wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr + 200
>5 CardReader_iOS 0x003c1087 mono_jit_runtime_invoke + 1134
>6 CardReader_iOS 0x003fbd2d mono_runtime_invoke + 88
>7 CardReader_iOS 0x003914af
native_to_managed_trampoline_CardReader_iOS_ICTableContactSource_GetCell + 402
8 UIKit 0x3256da5b + 410
>9 UIKit 0x32515e7d <redacted> + 1804
>10 UIKit 0x32515699 <redacted> + 184
>11 UIKit 0x3243bda3 <redacted> + 346
>12 QuartzCore 0x320c2c6b <redacted> + 142
>13 QuartzCore 0x320be47b <redacted> + 350
>14 QuartzCore 0x320be30d <redacted> + 16
>15 QuartzCore 0x320bdd1f <redacted> + 230
>16 QuartzCore 0x320bdb2f <redacted> + 314
>17 QuartzCore 0x32112825 <redacted> + 516
>18 IOMobileFramebuffer 0x34d0876d <redacted> + 104
>19 IOKit 0x309aaa75 IODispatchCalloutFromCFMessage + 248
>20 CoreFoundation 0x2fc88e21 <redacted> + 136
>21 CoreFoundation 0x2fc939df <redacted> + 34
>22 CoreFoundation 0x2fc9397b <redacted> + 346
>23 CoreFoundation 0x2fc9214f <redacted> + 1398
>24 CoreFoundation 0x2fbfcc27 CFRunLoopRunSpecific + 522
>25 CoreFoundation 0x2fbfca0b CFRunLoopRunInMode + 106
>26 GraphicsServices 0x348ec283 GSEventRunModal + 138
>27 UIKit 0x324a0049 UIApplicationMain + 1136
>28 CardReader_iOS 0x00166e40
wrapper_managed_to_native_MonoTouch_UIKit_UIApplication_UIApplicationMain_int_string ___ intptr_intptr + 272
29 CardReader_iOS 0x00143244 MonoTouch_UIKit_UIApplication_Main_string___string_string + 300
>30 CardReader_iOS 0x000aa148 CardReader_iOS_Application_Main_string__ + 172
>31 CardReader_iOS 0x002740d0
wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr + 200
>32 CardReader_iOS 0x003c1087 mono_jit_runtime_invoke + 1134
>33 CardReader_iOS 0x003fbd2d mono_runtime_invoke + 88
>34 CardReader_iOS 0x003ff8b5 mono_runtime_exec_main + 276
>35 CardReader_iOS 0x003ff705 mono_runtime_run_main + 424
>36 CardReader_iOS 0x003af6e1 mono_jit_exec + 48
>37 CardReader_iOS 0x00432704 main + 2468
>38 libdyld.dylib 0x3a4e5ab7 <redacted> + 2
> Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries
used by your application.
这是我的代码：
此方法在服务器回调后执行我将数据从服务器填充到新列表
public void addContacts(){
InvokeOnMainThread (delegate {
try{
tableContact.BeginUpdates();
items.AddRange(itemsAdd);
ICGlobal.contacts.AddRange(itemsAdd);
tableContact.ReloadData();
tableContact.SetNeedsDisplay();
tableContact.EndUpdates();
}catch(Exception e){
Console.WriteLine(e.StackTrace);
}
ICLayoutMgr.Get().SetBusy(false);
tableContact.ScrollEnabled = true;
});
}
这是自定义单元格类
public class ICTableContactCell : UITableViewCell
{
ICContactTableItem item;
ICContactCellView viewData;
public ICTableContactCell (ICContactTableItem item,NSString cellId) : base(UITableViewCellStyle.Default, cellId )
{
ContentView.BackgroundColor = UIColor.White;
this.item = item;
viewData = new ICContactCellView (this.item);
var view = new UIView (ContentView.Frame);
view.BackgroundColor = UIColor.Gray;
this.SelectionStyle = UITableViewCellSelectionStyle.Default;
this.SelectedBackgroundView = view;
ContentView.Add (viewData);
}
public override void LayoutSubviews ()
{
base.LayoutSubviews ();
viewData.Frame = ContentView.Bounds;
viewData.SetNeedsDisplay ();
}
public void UpdateCell (ICContactTableItem titem){
this.item = titem;
viewData.UpdateCell (titem);
}
}
public class ICContactCellView:UIView{
UILabel uiTitle;
UILabel uiCompany;
UIImageView imgSelected;
UIImageView imgDetail;
ICContactTableItem item;
static UIImage arrow=UIImage.FromFile("btnArrow.png");
static UIImage address=UIImage.FromFile("btnaddress.png");
public ICContactCellView (ICContactTableItem item)
{
this.item = item;
BackgroundColor = UIColor.White;
float yOffset = 5f;
UIColor otherColor = UIColor.Black;
uiTitle = IOTM.GUI.CreateLabel ("TITLE", yOffset+10f, yOffset, 200f, 24f, otherColor, "Helvetica-Bold", 14f);
uiCompany = IOTM.GUI.CreateLabel ("Comapany", yOffset+10f, yOffset + 16f, 200f, 24f, otherColor, "HelveticaNeue", 13f);
imgSelected =new UIImageView(){
Image = address,
Frame = IOTM.GUI.CreateFrame( yOffset+235f, yOffset+5f, 30, 30)
};
imgDetail = new UIImageView () {
Image = arrow,
Frame = IOTM.GUI.CreateFrame (280f, yOffset + 15f, 10, 10)
};
Add (uiTitle);
Add (uiCompany);
Add (imgSelected);
Add (imgDetail);
UpdateCell (this.item);
}
public void UpdateCell (ICContactTableItem titem){
this.item = titem;
if (item.index % 2 == 0)
BackgroundColor = ICGlobal.Gray;
else {
BackgroundColor = UIColor.White;
}
uiCompany.Text = "Company: " + item.enterprise;
uiTitle.Text = item.firstName+" "+item.lastName;
SetNeedsDisplay ();
}
}
TableViewSource
public class ICTableContactSource : UITableViewSource
{
public ICTableContactCell cell;
private static ICLoadMoreCell loadMore;
private ICContactTableItem itemC;
protected List<ICContactTableItem> tableItems;
protected string cellIdentifier;
public UINavigationController ParentNavigation{ get; set; }
public ICTableContactSource(List<ICContactTableItem> tl)
{
cellIdentifier = "contactCellID";
tableItems = tl;
}
public override int RowsInSection(UITableView t, int i)
{
return tableItems.Count+1;
}
public override UITableViewCell GetCell (UITableView tableView, NSIndexPath indexPath)
{
if (indexPath.Row == tableItems.Count) {
loadMore = tableView.DequeueReusableCell ("LoadingCell") as ICLoadMoreCell;
if (loadMore == null) {
loadMore = new ICLoadMoreCell (new NSString ("LoadingCell"));
}
loadMore.UpdateCell (null, 0);
return loadMore;
} else {
cell = tableView.DequeueReusableCell (cellIdentifier) as ICTableContactCell;
itemC = tableItems [indexPath.Row];
if (cell == null) {
itemC.index = indexPath.Row;
cell = new ICTableContactCell (itemC, new NSString (cellIdentifier));
cell.UpdateCell (itemC);
} else {
itemC.index = indexPath.Row;
cell.UpdateCell (itemC);
}
}
return cell as UITableViewCell;
}
public override void WillDisplay (UITableView tableView, UITableViewCell cell, NSIndexPath indexPath)
{
if (cell is ICLoadMoreCell) {
ICGlobal.currentContactView.loadMore ();
}
}