ios - whats wrong with this code im trying to change a label text with NSString and NSLog? -

im trying simple, im trying change label "i hi" clicking button. know how without nsstring wanted make more harder cant find whats wrong code not working.

- (ibaction)button:(id)sender{     nsstring *hi = @"hi";     _label.text = nslog(@"i %@", hi); } 

im trying more complicated , use void statement work , if not whats wrong it

- (void)num{ int num = 42; }  - (ibaction)button:(id)sender{     _label.text = nslog(@"i %i", num); } 

why trying use nslog this? that's showing messages in log.

you want nsstring stringwithformat:.

_label.text = [nsstring stringwithformat:@"i %@", hi); 

what have won't compile since nslog function not return nsstring value.