iOS: NSProxy can't hook method called inside of Class itself

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I use NSProxy to mock a class, and want to hook all invocation of the class. But only methods called outside the class are hooked, without methods called inside the class. Below is something like my code:

In my AppDelegate.m, I call

TBClassMock *mock = [[TBClassMock alloc] init];
TBTestClass *foo = [[TBTestClass alloc] init];
mock.target = foo;

foo = mock;
[foo outsideCalled];

In my TBTestClass.m

- (void)outsideCalled
{
    [self insideCalled];
}

- (void)insideCalled
{

}

In my TBClassMock.m

- (NSMethodSignature *)methodSignatureForSelector:(SEL)selector
{
    NSLog(@"Signature: %@", NSStringFromSelector(selector));
    return [self.target methodSignatureForSelector:selector];
}

-(void)forwardInvocation:(NSInvocation*)anInvocation
{
    //... Do other things

    [anInvocation invokeWithTarget:self.target];
}

Then I can log the invocation of [foo outsideCalled], but can't log the invocation of [self insideCalled].

I aim to do something in all invocations of the class in //... Do other things, and this way seems failed. Any explanations about this and any other method to implement my requirement? I just don't want to swizzle all methods of the class using method_exchangeImplementations as I think it's too fussy and not a good way.

asked 21 secs ago

keywind

88