如何处理 iOS4.0 的 iPhone 模拟器 NSInspiration 问题+

Question

对于iPhone Simulator iOS4.0+，NSInitation 不能很好地处理异常。我遇到了 解决方法。当我尝试将其作为 objc_msgSend(target_, [调用选择器]) 进行以下调用并在 createResponseFromIn Vocation() 下注释掉 [调用调用] 时，挂起。我尝试了不同的方法来调用 obj_msgSend 但没有成功。

 
- (NSInvocation *)createInvocationWithSelector:(SEL)selector
                                     signature:(NSMethodSignature *)method
                                     arguments:(NSDictionary *)arguments {
  NSInvocation *invocation
    = [NSInvocation invocationWithMethodSignature:method];
  [invocation setSelector:selector];
  [invocation setTarget:target_];

  if (arguments != nil) {
    if ([method numberOfArguments] > 2) {
      [invocation setArgument:&arguments atIndex:2];
    }
  }

  return invocation;
}

// Invoke the given invocation and create a response from it.
- (WDResponse *)createResponseFromInvocation:(NSInvocation *)invocation {
  WDResponse *response;

  @try {
    [invocation invoke];
    if ([[invocation methodSignature] methodReturnLength] == 0) {
      response = [WDResponse responseWithValue:nil];
    } else {
      id result;
      [invocation getReturnValue:&result];
      response = [WDResponse responseWithValue:result];
    }
  }
  @catch (NSException * e) {
    NSLog(@"Method invocation error: %@", e);
    response = [WDResponse responseWithError:e];
  }
  return response;
}

Answer 1

我找到了一个解决方案，完全删除 NSInitation 并在选择器上调用 objc_msgSend 。此解决方法有助于解决所有 NSInitation 异常处理。