我将monotouch更新到版本5.2.13后，当我触摸 UIButton 时，我的应用程序崩溃了 .
关于我的代码:(这是一个LoginView的问题）：
我有一个包含ScrollView的 UIViewController . 对于每个用户，ScrollView提供 UIView （UserImageView） . 此UserImageView包含UserImage，Username等 . 在UserImage上放置一个UIButton，它应该捕获Touch-Events以选择一个User . 此按钮更准确地导致下面的异常 UIView 中的 HitTest 方法 .
我得到以下Stacktrace：
堆栈跟踪：
at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication.UIApplicationMain (int,string[],intptr,intptr) <IL 0x0009f, 0xffffffff>
at MonoTouch.UIKit.UIApplication.Main (string[],string,string) [0x00042] in /Developer/MonoTouch/Source/monotouch/src/UIKit/UIApplication.cs:29
at MF.Stationaer.iPad.Application.Main (string[]) <IL 0x00028, 0x00073>
at (wrapper runtime-invoke) <Module>.runtime_invoke_void_object (object,intptr,intptr,intptr) <IL 0x00050, 0xffffffff>
本机堆栈跟踪：
0 MFiPad_MD 0x0009061c mono_handle_native_sigsegv + 284
1 MFiPad_MD 0x000059a8 mono_sigsegv_signal_handler + 248
2 libsystem_c.dylib 0x92cd259b _sigtramp + 43
3 ??? 0xffffffff 0x0 + 4294967295
4 UIKit 0x0228c741 __38-[UIView(Geometry) hitTest:withEvent:]_block_invoke_0 + 96
5 CoreFoundation 0x0116cf1a __NSArrayChunkIterate + 362
6 CoreFoundation 0x01138635 __NSArrayEnumerate + 997
7 CoreFoundation 0x01138026 -[NSArray enumerateObjectsWithOptions:usingBlock:] + 102
8 UIKit 0x0228c66b -[UIView(Geometry) hitTest:withEvent:] + 646
9 UIKit 0x0228c765 __38-[UIView(Geometry) hitTest:withEvent:]_block_invoke_0 + 132
10 CoreFoundation 0x0116cf1a __NSArrayChunkIterate + 362
11 CoreFoundation 0x01138635 __NSArrayEnumerate + 997
12 CoreFoundation 0x01138026 -[NSArray enumerateObjectsWithOptions:usingBlock:] + 102
13 UIKit 0x0228c66b -[UIView(Geometry) hitTest:withEvent:] + 646
14 UIKit 0x022a1157 -[UIScrollView hitTest:withEvent:] + 79
15 UIKit 0x0228c765 __38-[UIView(Geometry) hitTest:withEvent:]_block_invoke_0 + 132
16 CoreFoundation 0x0116cf1a __NSArrayChunkIterate + 362
17 CoreFoundation 0x01138635 __NSArrayEnumerate + 997
18 CoreFoundation 0x01138026 -[NSArray enumerateObjectsWithOptions:usingBlock:] + 102
19 UIKit 0x0228c66b -[UIView(Geometry) hitTest:withEvent:] + 646
20 UIKit 0x0228c765 __38-[UIView(Geometry) hitTest:withEvent:]_block_invoke_0 + 132
21 CoreFoundation 0x0116cf1a __NSArrayChunkIterate + 362
22 CoreFoundation 0x01138635 __NSArrayEnumerate + 997
23 CoreFoundation 0x01138026 -[NSArray enumerateObjectsWithOptions:usingBlock:] + 102
24 UIKit 0x0228c66b -[UIView(Geometry) hitTest:withEvent:] + 646
25 UIKit 0x0228c765 __38-[UIView(Geometry) hitTest:withEvent:]_block_invoke_0 + 132
26 CoreFoundation 0x0116cf1a __NSArrayChunkIterate + 362
27 CoreFoundation 0x01138635 __NSArrayEnumerate + 997
28 CoreFoundation 0x01138026 -[NSArray enumerateObjectsWithOptions:usingBlock:] + 102
29 UIKit 0x0228c66b -[UIView(Geometry) hitTest:withEvent:] + 646
30 UIKit 0x02286dbd +[UIWindow _hitTestToPoint:pathIndex:forEvent:] + 378
31 UIKit 0x02258ca0 _UIApplicationHandleEvent + 1648
32 GraphicsServices 0x047c5ef5 PurpleEventCallback + 1274
33 CoreFoundation 0x011a9195 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 53
34 CoreFoundation 0x0110dff2 __CFRunLoopDoSource1 + 146
35 CoreFoundation 0x0110c8da __CFRunLoopRun + 2218
36 CoreFoundation 0x0110bd84 CFRunLoopRunSpecific + 212
37 CoreFoundation 0x0110bc9b CFRunLoopRunInMode + 123
38 GraphicsServices 0x047c47d8 GSEventRunModal + 190
39 GraphicsServices 0x047c488a GSEventRun + 103
40 UIKit 0x02258626 UIApplicationMain + 1163
41 ??? 0x0b96e514 0x0 + 194438420
42 ??? 0x0b96d6c0 0x0 + 194434752
43 ??? 0x0b96d33c 0x0 + 194433852
44 ??? 0x0b96d42f 0x0 + 194434095
45 MFiPad_MD 0x00009d12 mono_jit_runtime_invoke + 722
46 MFiPad_MD 0x00169e4e mono_runtime_invoke + 126
47 MFiPad_MD 0x0016df34 mono_runtime_exec_main + 420
48 MFiPad_MD 0x001732e5 mono_runtime_run_main + 725
49 MFiPad_MD 0x00066f15 mono_jit_exec + 149
50 MFiPad_MD 0x002115d5 main + 2837
51 MFiPad_MD 0x00002d65 start + 53
执行本机代码时得到 SIGSEGV . 这通常表示单声道运行时或应用程序使用的本机库之一出现致命错误 .
这是我的代码的重要部分：
public class LoginViewController : UIViewController
{
...
public override void ViewDidLoad()
{
...
BuildUserUI();
...
}
private void BuildUserUI()
{
currentIconLocation = new PointF(50, 10);
for (var i = 0; i < UserList.List.Count; i++)
CreateUserInGrid(UserList.GetUserByIndex(i));
}
private void CreateUserInGrid(LoginUser user)
{
var imgFrame = new RectangleF(currentIconLocation.X, currentIconLocation.Y, 140, 170);
var loginImg = new UILoginImage(imgFrame);
loginImg.Image = user.Image ?? defaultUserImage.CGImage;
loginImg.Name = user.Nachname;
if (!string.IsNullOrEmpty(user.Vorname))
loginImg.Name += ", " + user.Vorname;
loginImg.Tag = user.UserIndex;
loginImg.AddTarget(this, new Selector("ShowNumberPad:"), UIControlEvent.TouchUpInside);
loginImg.LoginUser = user;
scrollView.AddSubview(loginImg);
loginImages.Add(loginImg);
limitedScrollView.UserInteractionEnabled = false;
var newSize = new SizeF(scrollView.Frame.Size.Width, currentIconLocation.Y + imgFrame.Size.Height + 20);
scrollView.ContentSize = newSize;
limitedScrollView.ContentSize = new SizeF(limitedScrollView.Frame.Size.Width, limitedScrollView.Frame.Size.Height);
currentIconLocation.X += imgFrame.Size.Width;
if (currentIconLocation.X + imgFrame.Size.Width > scrollView.Frame.Size.Width)
{
currentIconLocation.Y += imgFrame.Size.Height;
currentIconLocation.X = 50;
}
}
[Export("ShowNumberPad:")]
private void ShowNumberPad(NSObject sender)
{
...
}
}
public class UILoginImage : UIView
{
[Export("initWithFrame:")]
public UILoginImage(RectangleF frame)
: base(frame)
{
var shadowFrame = new RectangleF(0, 0, 117, 148);
wrapperControl = new UIControl(shadowFrame);
AddSubview(wrapperControl);
shadowImage = new UIImageView(shadowFrame);
shadowImage.Image = ImageCache.GetResourceImage("Images/Login/LoginSchatten.png");
wrapperControl.AddSubview(shadowImage);
var mainBackFrame = new RectangleF(8, 9, 98, 128);
whiteBackgroundImage = new UIImageView(mainBackFrame);
whiteBackgroundImage.Image = ImageCache.GetResourceImage("Images/Login/Singlewhite.png");
wrapperControl.AddSubview(whiteBackgroundImage);
var imageFrame = new RectangleF(13, 15, 87, 116);
clickHelper = UIButton.FromType(UIButtonType.Custom);
clickHelper.Frame = imageFrame;
wrapperControl.AddSubview(clickHelper);
userImage = new UIImageView(imageFrame);
AddSubview(userImage);
var mitarbeiterlabelFrame = new RectangleF(-12, 137, 140, 25);
mitarbeiterNameLabel = new FontSizeLabel(mitarbeiterlabelFrame);
mitarbeiterNameLabel.TextAlignment = UITextAlignment.Center;
mitarbeiterNameLabel.Font = UIFont.SystemFontOfSize(12);
mitarbeiterNameLabel.Opaque = false;
mitarbeiterNameLabel.BackgroundColor = UIColor.Clear;
AddSubview(mitarbeiterNameLabel);
var benutzerlabelFrame = new RectangleF(mitarbeiterlabelFrame.X, mitarbeiterlabelFrame.Y + 13, 140, 25);
benutzerNameLabel = new FontSizeLabel(benutzerlabelFrame);
benutzerNameLabel.TextAlignment = UITextAlignment.Center;
benutzerNameLabel.Font = UIFont.SystemFontOfSize(10);
benutzerNameLabel.Opaque = false;
benutzerNameLabel.BackgroundColor = UIColor.Clear;
benutzerNameLabel.TextColor = UIColor.DarkGray;
AddSubview(benutzerNameLabel);
}
public void AddTarget(NSObject target, Selector action, UIControlEvent controlEvents)
{
clickHelper.AddTarget(target, action, controlEvents);
}
public void RemoveTarget(NSObject target, Selector action, UIControlEvent controlEvents)
{
clickHelper.RemoveTarget(target, action, controlEvents);
}
}
1 回答
我不确定你使用
AddTarget是一个很好的方法来连接UIButton的点击 .您应该使用
clickHelper.TouchUpInside连接点击事件 . 这是标准的C＃事件 .另一种选择是将操作连接到XCode中的XIB文件中的此事件 .