情况:
我的objc静态库中定义了自定义类别:
@implementation UIViewController (Colorful)
-(void)changeColor:(UIColor *)color
{
self.view.backgroundColor = color;
}
@end
它绑定到Xamarin项目:
[Category, BaseType(typeof(UIViewController))]
interface UIViewController_Colorful
{
[Export ("changeColor:")]
void ChangeColor(UIColor color);
}
此类别用于以下代码:
public override bool FinishedLaunching (UIApplication app, NSDictionary options)
{
window = new UIWindow (UIScreen.MainScreen.Bounds);
UIViewController vc = new UIViewController ();
vc.ChangeColor (UIColor.Red);
window.RootViewController = vc;
window.MakeKeyAndVisible ();
return true;
}
它在模拟器上工作正常,但在设备上我得到以下异常。即使在库本身内调用类别,也会出现相同的情况。
我的设置是OS X 10.10,Xcode 6.3,Xamarin studio 5.9.3,Xamarin.iOS 8.10.1.64,Mono 4.0.1
感谢。
$exception {Foundation.MonoTouchException: Objective-C exception thrown. Name: NSInvalidArgumentException Reason: -[UIViewController changeColor:]: unrecognized selector sent to instance 0x1759cd70
at ObjCRuntime.Runtime.ThrowNSException (IntPtr ns_exception) [0x00000] in /Users/builder/data/lanes/1503/e6ebd18b/source/maccore/src/ObjCRuntime/Runtime.cs:167
at ObjCRuntime.Runtime.throw_ns_exception (IntPtr exc) [0x00000] in <filename unknown>:0
at (wrapper native-to-managed) ObjCRuntime.Runtime:throw_ns_exception (intptr)
at (wrapper managed-to-native) UIKit.UIApplication:UIApplicationMain (int,string[],intptr,intptr)
at UIKit.UIApplication.Main (System.String[] args, IntPtr principal, IntPtr delegate) [0x00005] in /Users/builder/data/lanes/1503/e6ebd18b/source/maccore/src/UIKit/UIApplication.cs:63 at UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x0001c] in /Users/builder/data/lanes/1503/e6ebd18b/source/maccore/src/UIKit/UIApplication.cs:46
at XTestApp.Application.Main (System.String[] args) [0x00008] in /Volumes/MacWork/xamarin/BindingTest/xamarin/XTest/XTestApp/Main.cs:17
NSInvalidArgumentException: -[UIViewController changeColor:]: unrecognized selector sent to instance 0x1759cd70
0 CoreFoundation 0x264de007 <redacted> + 150
1 libobjc.A.dylib 0x3478dc8b objc_exception_throw + 38
2 CoreFoundation 0x264e3409 <redacted> + 0
3 CoreFoundation 0x264e1327 <redacted> + 714
4 CoreFoundation 0x26410e78 _CF_forwarding_prep_0 + 24
5 XTestApp 0x0026e21c wrapper_managed_to_native_ApiDefinition_Messaging_void_objc_msgSend_IntPtr_intptr_intptr_intptr + 228
6 XTestApp 0x0026d4c0 Binding_UIViewController_Colorful_ChangeColor_UIKit_UIViewController_UIKit_UIColor + 432
7 XTestApp 0x000c8424 XTestApp_AppDelegate_FinishedLaunching_UIKit_UIApplication_Foundation_NSDictionary + 592
8 XTestApp 0x0022c4d8 wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr + 224
9 XTestApp 0x0029d933 mono_jit_runtime_invoke + 1190
10 XTestApp 0x002da025 mono_runtime_invoke + 88
11 XTestApp 0x0026e605 native_to_managed_trampoline_1 + 420
12 XTestApp 0x0026ea31 -[AppDelegate application:didFinishLaunchingWithOptions:] + 100
13 UIKit 0x29b9e293 <redacted> + 374
14 UIKit 0x29d94b29 <redacted> + 2444
15 UIKit 0x29d971e9 <redacted> + 1412
16 UIKit 0x29da1e69 <redacted> + 36
17 UIKit 0x29d9598b <redacted> + 130
18 FrontBoardServices 0x2cf95ec9 <redacted> + 16
19 CoreFoundation 0x264a3fd5 <redacted> + 12
20 CoreFoundation 0x264a3299 <redacted> + 216
21 CoreFoundation 0x264a1dd3 <redacted> + 1714
22 CoreFoundation 0x263ee201 CFRunLoopRunSpecific + 476
23 CoreFoundation 0x263ee013 CFRunLoopRunInMode + 106
24 UIKit 0x29b97e67 <redacted> + 558
25 UIKit 0x29b92a59 UIApplicationMain + 1440
26 XTestApp 0x0010710c wrapper_managed_to_native_UIKit_UIApplication_UIApplicationMain_int_string___intptr_intptr + 272
27 XTestApp 0x000e56dc UIKit_UIApplication_Main_string___intptr_intptr + 52
28 XTestApp 0x000e569c UIKit_UIApplication_Main_string___string_string + 204
29 XTestApp 0x000c8130 XTestApp_Application_Main_string__ + 172
30 XTestApp 0x0022c4d8 wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr + 224
31 XTestApp 0x0029d933 mono_jit_runtime_invoke + 1190
32 XTestApp 0x002da025 mono_runtime_invoke + 88
33 XTestApp 0x002dd4c7 mono_runtime_exec_main + 282
34 XTestApp 0x002dd309 mono_runtime_run_main + 476
35 XTestApp 0x0028c5d9 mono_jit_exec + 48
36 XTestApp 0x0032d3ec xamarin_main + 2184
37 XTestApp 0x0026f4dd main + 112
38 libdyld.dylib 0x34d19aaf <redacted> + 2 } Foundation.MonoTouchException
答案 0 :(得分:9)
包含Objective-C类别的所有静态库必须将-ObjC
传递给本机链接器,否则可能会删除类别(as documented by Apple)。
这可以通过两种方式实现:
-gcc_flags -ObjC
添加到项目的iOS Build选项中的其他mtouch参数中,用于每个(设备)项目配置。如果使用绑定项目,则可以修改LinkWith属性以包含此链接器标志:
[assembly: LinkWith ("...", LinkerFlags = "-ObjC")]