我收到以下错误.....
tacktrace：
at（wrapper managed-to-native）MonoTouch.UIKit.UIApplication.UIApplicationMain（int，string []，intptr，intptr） 在/Developer/MonoTouch/Source/monotouch/src/UIKit/UIApplication.cs:38中的MonoTouch.UIKit.UIApplication.Main（string []，string，string）[0x0004c] 在F2U.UI.Application.Main（string []）[0x00000] in /Users/ravichandra/Desktop/19-10-2012/F2S/F2S.UI/Main.cs:21 at（wrapper runtime-invoke）.runtime_invoke_void_object（object，intptr，intptr，intptr）
原生堆栈跟踪：
0 navigation 0x00090dfc mono_handle_native_sigsegv + 284
1 navigation 0x00005c28 mono_sigsegv_signal_handler + 248
2 libsystem_c.dylib 0x9ca8259b _sigtramp + 43
3 ??? 0xffffffff 0x0 + 4294967295
4 UIKit 0x0223555a -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 61
5 UIKit 0x022dab76 -[UIControl sendAction:to:forEvent:] + 66
6 UIKit 0x022db03f -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 503
7 UIKit 0x022da2fe -[UIControl touchesEnded:withEvent:] + 549
8 UIKit 0x0225aa30 -[UIWindow _sendTouchesForEvent:] + 513
9 UIKit 0x0225ac56 -[UIWindow sendEvent:] + 273
10 UIKit 0x02241384 -[UIApplication sendEvent:] + 464
11 UIKit 0x02234aa9 _UIApplicationHandleEvent + 8196
12 GraphicsServices 0x047f6fa9 PurpleEventCallback + 1274
13 CoreFoundation 0x0119c1c5 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 53
14 CoreFoundation 0x01101022 __CFRunLoopDoSource1 + 146
15 CoreFoundation 0x010ff90a __CFRunLoopRun + 2218
16 CoreFoundation 0x010fedb4 CFRunLoopRunSpecific + 212
17 CoreFoundation 0x010feccb CFRunLoopRunInMode + 123
18 GraphicsServices 0x047f5879 GSEventRunModal + 207
19 GraphicsServices 0x047f593e GSEventRun + 114
20 UIKit 0x02232a9b UIApplicationMain + 1175
21 ??? 0x0d90a384 0x0 + 227582852
22 ??? 0x0d909180 0x0 + 227578240
23 ??? 0x0d9089a0 0x0 + 227576224
24 ??? 0x0d908a2f 0x0 + 227576367
25 navigation 0x00009fe2 mono_jit_runtime_invoke + 722
26 navigation 0x0016b87e mono_runtime_invoke + 126
27 navigation 0x0016fa04 mono_runtime_exec_main + 420
28 navigation 0x00174df5 mono_runtime_run_main + 725
29 navigation 0x000671e5 mono_jit_exec + 149
30 navigation 0x00203e41 main + 2209
31 navigation 0x00002fe5 start + 53
32 ??? 0x00000005 0x0 + 5
=============================================== ================== 执行本机代码时获得SIGSEGV。这通常表明 单声道运行时或其中一个本机库中的致命错误。
=============================================== ==================
请任何人帮助我
这是我的代码
btnMylocation.Clicked += (sender, e) =>
{
imgbg.Hidden=false;
lbltime.Hidden=false;
btnup.Hidden=false;
btndown.Hidden=false;
imghazard.Hidden=false;
lblfeets.Hidden=false;
try
{
if(!Reachability.IsHostReachable ("www.google.com"))
{
alertview.NetworkFail ();
}
else
{
this.mysegments.SelectedSegment = 0;
mapView.RemoveAnnotations (mapView.Annotations);
var locationservice = new LocationService ();
var currentLocation = locationservice.GetCurrentLocation ();
var visregion = BuildVisibleRegion (currentLocation);
mapView.SetRegion (visregion, true);
targetimage.Hidden = true;
locations = LocationManager.Locations ();
List<double> distlist=new List<double>();
foreach(LocationModel d in locations)
{
var dist=distance (currentLocation.Latitude,currentLocation.Longitude,Convert.ToDouble (d.latitude),Convert.ToDouble (d.longitude));
distlist.Add (dist);
}
if(distlist.Count!=0)
{
distlist.Sort ();
double min= distlist[0];
foreach (LocationModel f in locations)
{
string feets = (min*3280).ToString ();
var dist=distance (currentLocation.Latitude,currentLocation.Longitude,Convert.ToDouble (f.latitude),Convert.ToDouble (f.longitude));
if(min == dist)
{
string lat = f.latitude;
string lon = f.longitude;
NSUserDefaults.StandardUserDefaults.SetString (f.hazardid,"hazardid");
this.View.AddSubview (imgbg);
this.View.AddSubview (imghazard);
this.View.AddSubview (lblfeets);
this.View.AddSubview (btnup);
this.View.AddSubview (btndown);
this.View.AddSubview (lbltime);
if (f.hazardtype == 1)
{
pins.Clear ();
pins.Add (new PoliceAnnotation (new CLLocationCoordinate2D (Convert.ToDouble (lat), Convert.ToDouble (lon)), "Click here to Report",""));
mapView.AddAnnotationObject (pins [0]);
mapView.AddAnnotation (mapAnnotations [(int)Anotationindex.police]);
lblfeets.Text=feets + " fts";
lbltime.Text=f.ReportDate + " Ago";
imghazard.Image=UIImage.FromFile ("Images/police-cop-mark.png");
}
else if (f.hazardtype == 2)
{
duipins.Clear ();
duipins.Add (new DuiAnnotation (new CLLocationCoordinate2D (Convert.ToDouble (lat), Convert.ToDouble (lon)), "Click here to Report",""));
mapView.AddAnnotationObject (duipins [0]);
mapView.AddAnnotation (mapAnnotations [(int)Anotationindex.dui]);
lblfeets.Text=feets + " fts";
lbltime.Text=f.ReportDate + " Ago";
imghazard.Image=UIImage.FromFile ("Images/dui-stop-mark.png");
}
else if(f.hazardtype==3)
{
campins.Clear ();
campins.Add (new SpeedcamAnnotation (new CLLocationCoordinate2D (Convert.ToDouble (lat), Convert.ToDouble (lon)), "",""));
mapView.AddAnnotationObject (campins [0]);
mapView.AddAnnotation (mapAnnotations [(int)Anotationindex.cam]);
lblfeets.Text=feets + " fts";
lbltime.Text=f.ReportDate + " Ago";
imghazard.Image=UIImage.FromFile ("Images/speed-camera-mark.png");
}
}
}
btnup.TouchUpInside += (sender1, e1) =>
{
NSUserDefaults.StandardUserDefaults.SetString("1","Status");
NSUserDefaults.StandardUserDefaults.Init();
Response = LocationManager.ConfirmLocation();
if(Response.Status == "1" || Response.Status == "12")
{
UIAlertView alert1 = new UIAlertView ("Success","",null,"Ok");
alert1.Show ();
}
else
{
}
};
btndown.TouchUpInside += (sender1, e1) =>
{
NSUserDefaults.StandardUserDefaults.SetString("0","Status");
NSUserDefaults.StandardUserDefaults.Init();
Response = LocationManager.ConfirmLocation ();
if(Response.Status == "1" || Response.Status == "12")
{
UIAlertView alert1 = new UIAlertView ("Success","",null,"Ok");
alert1.Show ();
}
else
{
}
};
}
}
}
catch(Exception ex)
{
if(ex.Message == "Network Fail")
alertview.NetworkFail ();
else
alertview.ProcessFailed ();
}
};
第一次单击btnMylocation会显示一个弹出窗口，其中有两个按钮并且单击两个按钮工作正常，但是当我尝试再次单击btnMylocation时，打开弹出窗口但单击两个按钮中的任何一个btnup和btndown会使应用程序崩溃。 ......任何想法，请....
答案 0 :(得分：1)
Rolf是对的，有一种方法可以通过不正确地设置事件来实现此崩溃。这是GC在MonoTouch中与Objective-C交互的方式。
例如，如果你将ViewDidLoad放在名为myButton的插座上，它就会正常工作：
myButton.TouchUpInside += (sender, e) =>
{
//Do something
};
但如果你这样做了：
myButton1.TouchUpInside += (sender, e) =>
{
var myButton2 = new UIButton();
myButton2.TouchUpInside += (sender, e) =>
{
//Do something
};
//Add button2 to the view, etc.
};
然后myButton2可能会第一次正确点击，但最终你会在GC收集后崩溃。发生这种情况是因为myButton2的C＃包装器将收集garbarge，但Objective-C实例仍然会挂起。当Objective-C实例被点击时，它就无法调用C＃，因为它已经消失了。
一种简单的解决方法，使按钮成为您班级的成员变量：
private UIButton myButton;
请确保不要一遍又一遍地创建它。