Question

我试图将这个Objective-c代码移植到c＃但没有成功......

IMP imp = imp_implementationWithBlock(^void(id me, void* arg0, BOOL arg1, BOOL arg2, id arg3) {      
     ((void (*)(id, SEL, void*, BOOL, BOOL, id))originalImp)(me, sel, arg0, TRUE, arg2, arg3);

我已经转换成了这个：

static Selector selector1;

[MonoNativeFunctionWrapper]
public delegate void OriginalDelegate(NSObject me, Selector sel, IntPtr arg0, bool arg1, bool arg2, NSObject arg3);

delegate void CaptureDelegate(NSObject me, IntPtr arg0, bool arg1, bool arg2, NSObject arg3);

[MonoPInvokeCallback(typeof(CaptureDelegate))]
static void MyCapture(NSObject me, IntPtr arg0, bool arg1, bool arg2, NSObject arg3)
{
  OriginalDelegate del = (OriginalDelegate)Marshal.GetDelegateForFunctionPointer(_original,   typeof(OriginalDelegate));
  del(me, selector1, arg0, true, arg2, arg3);
}

代码编译正确。问题非常局限于：

（我，selector1，arg0，true，arg2，arg3），特别是在selector1参数中。此调用执行委托OriginalDelegate。运行时发生的错误是：

Type ObjCRuntime.Selector which is passed to unmanaged code must have a StructLayout attribute.

它告诉我Selector对象必须定义StructAttribute属性。 ????

有人能帮我们一把吗？

谢谢。

编辑：我已经添加了Selector1声明，如果我尝试更改类型Selector to IntPtr，那么我发现以下错误：

Objective-C exception thrown.Name: NSInvalidArgumentException Reason: -_NSMallocBlock__ _stopAssistingNode]: unrecognized selector sent to instance 0x12ff844d0
Native stack trace:
    0   CoreFoundation                      0x000000011465e12b __exceptionPreprocess + 171
    1   libobjc.A.dylib                     0x00000001153fcf41 objc_exception_throw + 48
    2   CoreFoundation                      0x00000001146df024 -[NSObject(NSObject) doesNotRecognizeSelector:]*- + 132
    3   CoreFoundation                      0x00000001145e0f78 ___forwarding___ + 1432
    4   CoreFoundation                      0x00000001145e0958 _CF_forwarding_prep_0 + 120
    5   WebKit                              0x00000001072de47e -[WKContentView(WKInteraction) _startAssistingNode:userIsInteracting:blurPreviousNode:userObject:] + 291
    6   ???                                 0x000000013562b176 0x0 + 5190627702

再次感谢！

无法将Objective-C代码移植到C＃

0 个答案: