.h
#import <UIKit/UIKit.h> @interface FirstViewController : UIViewController -(IBAction)showMessagezhege; @end
.m
#import "FirstViewController.h" @interface FirstViewController () @end @implementation FirstViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } - (IBAction)showMessagezhege { UIAlertView *helloWorldAlert = [[UIAlertView alloc] initWithTitle:@"this is the first" message:@"first" delegate:nil cancelButtonTitle:@"cancel." otherButtonTitles:nil]; [helloWorldAlert show]; } @end