ios - about sharedInstance SOMotionDetector and SOStepDetector objective-c -

i'm working on following code, has steps of person walking. every time step 1 view counter stops. working somotiondetector.

note: when printing console steps continues function changing views.

#import "somotiondetector.h" #import "sostepdetector.h"  @interface contarpasos ()<somotiondetectordelegate> {     int stepcount; } @property (weak, nonatomic) iboutlet uilabel *speedlabel; @property (weak, nonatomic) iboutlet uilabel *stepcountlabel; @property (weak, nonatomic) iboutlet uilabel *motiontypelabel; @property (weak, nonatomic) iboutlet uilabel *isshakinglabel;  @end  @implementation contarpasos  - (void)viewdidload {     [super viewdidload];  __strong contarpasos *weakself = self; [somotiondetector sharedinstance].motiontypechangedblock = ^(somotiontype motiontype) {     nsstring *type = @"";     switch (motiontype) {         case motiontypenotmoving:             type = @"no estas moviendote";             break;         case motiontypewalking:             type = @"caminando";             break;         case motiontyperunning:             type = @"corriendo";             break;         case motiontypeautomotive:             type = @"automotive";             break;     }     weakself.motiontypelabel.text = type; };  [somotiondetector sharedinstance].locationchangedblock = ^(cllocation *location) {     weakself.speedlabel.text = [nsstring stringwithformat:@"%.2f km/h",        [somotiondetector sharedinstance].currentspeed * 3.6f]; };  [somotiondetector sharedinstance].accelerationchangedblock = ^(cmacceleration acceleration) {     bool isshaking = [somotiondetector sharedinstance].isshaking;     weakself.isshakinglabel.text = isshaking ? @"corriendo":@"no corriendo"; };  if (system_version_greater_than_or_equal_to(@"7.0")) {     [somotiondetector sharedinstance].usem7ifavailable = yes; //use m7 chip if available, otherwise use lib's algorithm }  [[somotiondetector sharedinstance] startdetection]; [[sostepdetector sharedinstance] startdetectionwithupdateblock:^(nserror *error) {     if (error) {         nslog(@"%@", error.localizeddescription);         return;     }     stepcount++;     weakself.stepcountlabel.text = [nsstring stringwithformat:@"pasos: %d", stepcount];       nslog(@"always printed on console not in view: %d", stepcount);      }];    }