ios - How to do an if statement with a button? -

i'm new objective-c , learning bit bit, , have question it.

i made iphone app incrementing or decreasing number, example, , default number set 0. pressing up, down or restart button have different command options. put play if statement, ex. when label number (0) equals 5 (5) have popup box, or text saying "you have reached number 5"; learn , able implement in future app or game.

viewcontroller.h

#import <uikit/uikit.h>  int number;  @interface viewcontroller : uiviewcontroller {     iboutlet uilabel *count; }  - (ibaction)up:(id)sender; - (ibaction)down:(id)sender; - (ibaction)restart:(id)sender;  @end 

viewcontroller.m

#import "viewcontroller.h"  @interface viewcontroller () @end  @implementation viewcontroller  - (ibaction)up:(id)sender {     number = number + 1;     count.text = [nsstring stringwithformat:@"%i", number]; }  - (ibaction)down:(id)sender {     number = number - 1;     count.text = [nsstring stringwithformat:@"%i", number]; }    - (ibaction)restart:(id)sender {      number = 0;      count.text = [nsstring stringwithformat:@"%i", number]; }   - (void)viewdidload {     number = 0;     count.text = [nsstring stringwithformat:@"%i", number];      [super viewdidload];     // additional setup after loading view, typically nib. } 

you can add method:

- (void)checknumber {     if (number == 5) {         // show alert     } } 

and in code:

-(ibaction)up:(id)sender {     number = number + 1;     count.text = [nsstring stringwithformat:@"%i", number];      [self checknumber]; }  -(ibaction)down:(id)sender {     number = number - 1;      count.text = [nsstring stringwithformat:@"%i", number];      [self checknumber]; } 

then, learn naming conventions names wrong (letter capitalisation).