我的应用程序中有一些奇怪的崩溃，我试图跟踪问题但是随机发生并且在不同的clases或方法中，所有崩溃都是无效的强制转换异常但是没有逻辑...这是一个他们
//ContactsViewController.cs
//Initialize Components
tableContact=IOTM.GUI.CreateTable(rTable,UIColor.White,UIColor.White,50f);
refresh = IOTM.GUI.createRefreshControl (tableContact);
refresh.ValueChanged += reloadData;
//IOTM.GUI
public static UIRefreshControl createRefreshControl(UITableView table){
UIRefreshControl refresh=new UIRefreshControl ();
var firstAttrib = new UIStringAttributes {
ForegroundColor = UIColor.Black,
BackgroundColor = UIColor.Clear,
Font = UIFont.FromName("Helvetica", 10f )
};
string registerString = "Pull to Update Contacts";
var styledRegisterString = new NSMutableAttributedString (registerString);
styledRegisterString.AddAttributes(firstAttrib, new NSRange (0,registerString.Length) );
refresh.AttributedTitle = styledRegisterString;
refresh.TintColor = ICGlobal.OrangeLigth;
table.AddSubview (refresh);
return refresh;
}
public static UITableView CreateTable( RectangleF bounds, UIColor bgColor, UIColor lineColor, float rowHeight, UIView v = null)
{
UITableView t = new UITableView (bounds) {
BackgroundColor = bgColor,
SeparatorColor = lineColor,
RowHeight = rowHeight
};
if (null != v) {
v.AddSubview (t);
}
return t;
}
这是错误日志
Unhandled Exception:
0 CardReader_iOS 0x004188a3 mono_handle_exception_internal + 2022
1 CardReader_iOS 0x004180b7 mono_handle_exception + 10
2 CardReader_iOS 0x004128dd mono_arm_throw_exception + 104
3 CardReader_iOS 0x002e6b9c throw_exception + 68
at MonoTouch.Foundation.NSArray.UnsafeGetItem<T> (intptr,uint) <0x00044>
at MonoTouch.Foundation.NSArray.ArrayFromHandle<T> (intptr) <0x0008c>
at MonoTouch.UIKit.UIView.get_Subviews () [0x00010] in /Developer/MonoTouch/Source/monotouch/src/build/compat/UIKit/.pmcs-compat.UIView.g.cs:2402
at MonoTouch.UIKit.UIView.AddSubview (MonoTouch.UIKit.UIView) [0x0005c] in /Developer/MonoTouch/Source/monotouch/src/build/compat/UIKit/.pmcs-compat.UIView.g.cs:475
at Core_IC_IOTM.GUI.createRefreshControl (MonoTouch.UIKit.UITableView) <IL 0x00075, 0x00368>
at CardReader_iOS.ContactsViewController.InitializeComponents () <IL 0x00368, 0x01924>
at CardReader_iOS.ICBaseController.ViewDidLoad () <IL 0x00018, 0x000d4>
at (wrapper runtime-invoke) object.runtime_invoke_dynamic (intptr,intptr,intptr,intptr) <0x000c8>
12 CardReader_iOS 0x004243f5 mono_jit_runtime_invoke + 1196
13 CardReader_iOS 0x0046059d mono_runtime_invoke + 88
14 CardReader_iOS 0x003f4e69 native_to_managed_trampoline_CardReader_iOS_ICBaseController_ViewDidLoad + 232
15 UIKit 0x30e224cb <redacted> + 518
16 UIKit 0x30e22289 <redacted> + 24
17 UIKit 0x30fae38b <redacted> + 634
18 UIKit 0x30ecbd83 <redacted> + 418
19 UIKit 0x30ecbb8d <redacted> + 44
20 UIKit 0x30ecbb25 <redacted> + 184
21 UIKit 0x30e1dd79 <redacted> + 380
22 QuartzCore 0x30a9b62b <redacted> + 142
23 QuartzCore 0x30a96e3b <redacted> + 350
24 QuartzCore 0x30a96ccd <redacted> + 16
25 QuartzCore 0x30a966df <redacted> + 230
26 QuartzCore 0x30a964ef <redacted> + 314
27 UIKit 0x30e21401 <redacted> + 8232
28 CoreFoundation 0x2e5cd25b <redacted> + 14
29 CoreFoundation 0x2e5cc72b <redacted> + 206
30 CoreFoundation 0x2e5caf1f <redacted> + 622
31 CoreFoundation 0x2e535f4f CFRunLoopRunSpecific + 522
32 CoreFoundation 0x2e535d33 CFRunLoopRunInMode + 106
33 GraphicsServices 0x3343a663 GSEventRunModal + 138
34 UIKit 0x30e8116d UIApplicationMain + 1136
at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication.UIApplicationMain (int,string[],intptr,intptr) <0x00110>
at MonoTouch.UIKit.UIApplication.Main (string[],string,string) [0x0004c] in /Developer/MonoTouch/Source/monotouch/src/UIKit/.pmcs-compat.UIApplication.cs:38
at CardReader_iOS.Application.Main (string[]) <IL 0x0000c, 0x0007c>
at (wrapper runtime-invoke) object.runtime_invoke_dynamic (intptr,intptr,intptr,intptr) <0x000c8>
39 CardReader_iOS 0x004243f5 mono_jit_runtime_invoke + 1196
40 CardReader_iOS 0x0046059d mono_runtime_invoke + 88
41 CardReader_iOS 0x00464177 mono_runtime_exec_main + 282
42 CardReader_iOS 0x00463fb7 mono_runtime_run_main + 474
43 CardReader_iOS 0x004126e5 mono_jit_exec + 48
44 CardReader_iOS 0x004b0fe8 main + 2464
45 libdyld.dylib 0x392bbab7 <redacted> + 2
Mar 17 17:33:19 iPhone-de-Hector CardReader_iOS[4306] <Warning>: Unhandled managed exception: Unable to cast object of type 'MonoTouch.UIKit.UIScrollView+_UIScrollViewDelegate' to type 'MonoTouch.UIKit.UIView'. (System.InvalidCastException)
at MonoTouch.ObjCRuntime.Runtime.GetINativeObject[UIView] (IntPtr ptr, Boolean owns) [0x00000] in <filename unknown>:0
at MonoTouch.Foundation.NSArray.UnsafeGetItem[UIView] (IntPtr handle, UInt32 index) [0x00000] in <filename unknown>:0
at MonoTouch.Foundation.NSArray.ArrayFromHandle[UIView] (IntPtr handle) [0x00000] in <filename unknown>:0
at MonoTouch.UIKit.UIView.get_Subviews () [0x00010] in /Developer/MonoTouch/Source/monotouch/src/build/compat/UIKit/.pmcs-compat.UIView.g.cs:2402
at MonoTouch.UIKit.UIView.AddSubview (MonoTouch.UIKit.UIView view) [0x0005c] in /Developer/MonoTouch/Source/monotouch/src/build/compat/UIKit/.pmcs-compat.UIView.g.cs:475
at Core_IC_IOTM.GUI.createRefreshControl (MonoTouch.UIKit.UITableView table) [0x00000] in <filename unknown>:0
at CardReader_iOS.ContactsViewController.InitializeComponents () [0x00000] in <filename unknown>:0
at CardReader_iOS.ICBaseController.ViewDidLoad () [0x00000] in <filename unknown>:0
at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication:UIApplicationMain (int,string[],intptr,intptr)
at MonoTouch.UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x0004c] in /Developer/MonoTouch/Source/monotouch/src/UIKit/.pmcs-compat.UIApplication.cs:38
at CardReader_iOS.Application.Main (System.String[] args) [0x00000] in <filename unknown>:0
答案 0 :(得分：0)
我认为特定错误是由错误使用UIRefreshControl引起的。
注意：因为刷新控件是专门为使用而设计的 由表视图控制器管理的表视图，在a中使用它 不同的上下文可能会导致未定义的行为。
确保将控件分配给UITableViewController而不是作为子视图添加到UITableView：
除了为表视图分配刷新控件外 controller的refreshControl属性
这样的事情：
public class TableViewController : UITableViewController
{
public TableViewController () : base (UITableViewStyle.Grouped)
{
this.RefreshControl = CreateRefreshControl ();
}
public static UIRefreshControl CreateRefreshControl()
{
var firstAttrib = new UIStringAttributes {
ForegroundColor = UIColor.Black,
BackgroundColor = UIColor.Clear,
Font = UIFont.FromName("Helvetica", 10f )
};
string registerString = "Pull to Update Contacts";
var styledRegisterString = new NSMutableAttributedString (registerString);
styledRegisterString.AddAttributes(firstAttrib, new NSRange (0,registerString.Length) );
return new UIRefreshControl () {
AttributedTitle = styledRegisterString,
TintColor = UIColor.Orange//ICGlobal.OrangeLigth
};
}