didBecomeInactiveSignal send value before viewDidLoad,is this right?

[Tiger6688]

- (RACSignal *)didBecomeInactiveSignal {
    if (_didBecomeInactiveSignal == nil) {
        @weakify(self);

        _didBecomeInactiveSignal = [[[RACObserve(self, active)
            filter:^ BOOL (NSNumber *active) {
                NSLog(@"active:%@",active);
                return !active.boolValue;
            }]
            map:^(id _) {
                @strongify(self);
                return self;
            }]
            setNameWithFormat:@"%@ -didBecomeInactiveSignal", self];
    }

    return _didBecomeInactiveSignal;
}

  //in  myviewmodel
-(id)init{
//---
    [self.didBecomeInactiveSignal subscribeNext:^(id x){
        NSLog(@"didBecomeInactiveSignal");
    }];
//---

//in myviewcontroller that related with myviewmodel
- (void)viewDidLoad
{
   NSLog(@"did load");
}

output: 2014-11-04 23:03:18.714 [5256:60b] active:0 2014-11-04 23:03:18.793 [5256:60b] didBecomeInactiveSignal 2014-11-04 23:03:18.911 [5256:60b] active:0 2014-11-04 23:03:18.913 [5256:60b] active:0 2014-11-04 23:03:19.051 [5256:60b] active:0 2014-11-04 23:03:19.052 [5256:60b] active:0 2014-11-04 23:03:19.082 [5256:60b] view did load

[jspahrsummers]

As documented, the activity signals fire once if the current value matches the condition.