NSNotificationDemo

//

//  ViewController.m

//  NSNotification

//

//  Created by Liming Tian on 11/25/14.

//  Copyright (c) 2014 Liming Tian. All rights reserved.

//

#import "ViewController.h"

@interface ViewController ()

- (void)posterNotificationWithString:(NSString *)orientation;

- (void)useNotificationWithString:(NSNotification *)notification;

@end

static NSString *notificationName = @"MTPosterNotificationTut";

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    [[NSNotificationCenter defaultCenter]

     addObserver:self

     selector:@selector(useNotificationWithString:)

     name:notificationName

     object:nil];

}

- (void)posterNotificationWithString:(NSString *)orientation

{

    NSString *key = @"orientationValue";

    NSDictionary *dic = [NSDictionary dictionaryWithObject:orientation forKey:key];

    [[NSNotificationCenter defaultCenter] postNotificationName:notificationName object:nil userInfo:dic];

}

- (void)useNotificationWithString:(NSNotification *)notification

{

    NSString *key = @"orientationValue";

    NSDictionary *dic = notification.userInfo;

    NSString *stringKeyToUse = [dic objectForKey:key];

    

    NSLog(@"device orientation is:%@",stringKeyToUse);

}

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration

{

    NSLog(@"%s",__FUNCTION__);

    

    if (toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft) {

        [self posterNotificationWithString:@"LandscapeLeft"];

    } else if (toInterfaceOrientation == UIInterfaceOrientationLandscapeRight) {

        [self posterNotificationWithString:@"LandscapeRight"];

    }

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

- (void)dealloc

{

    [[NSNotificationCenter defaultCenter] removeObserver:self];

}

@end