ios通知使用 书上案例 简单易懂

/* The notification name */
const NSString *ResultOfAppendingTwoStringsNotification =
@"ResultOfAppendingTwoStringsNotification"; /* Keys inside the dictionary that our notification sends */
const NSString
*ResultOfAppendingTwoStringsFirstStringInfoKey = @"firstString";
const NSString
*ResultOfAppendingTwoStringsSecondStringInfoKey = @"secondString";
const NSString
*ResultOfAppendingTwoStringsResultStringInfoKey = @"resultString";

//发送通知方法
- (void) broadcastNotification{

NSString *firstName = @"Anthony";
NSString *lastName = @"Robbins";
NSString *fullName = [firstName stringByAppendingString:lastName];

NSArray *objects = [[NSArray alloc] initWithObjects:
firstName,
lastName,
fullName,
nil];
NSArray *keys = [[NSArray alloc] initWithObjects: ResultOfAppendingTwoStringsFirstStringInfoKey, ResultOfAppendingTwoStringsSecondStringInfoKey, ResultOfAppendingTwoStringsResultStringInfoKey,
nil];
NSDictionary *userInfo = [[NSDictionary alloc] initWithObjects:objects forKeys:keys];
NSNotification *notificationObject =
[NSNotification notificationWithName:(NSString *)ResultOfAppendingTwoStringsNotification object:self
userInfo:userInfo];
[[NSNotificationCenter defaultCenter] postNotification:notificationObject];

}

//监听通知调用方法
- (void) appendingIsFinished:(NSNotification *)paramNotification
{

NSLog(@"Notification is received.");
NSLog(@"Notification Object = %@",[paramNotification object]);
NSLog(@"Notification User-Info Dict = %@", [paramNotification userInfo]);
}

- (void)viewDidLoad
{
//监听通知
[[NSNotificationCenter defaultCenter]
addObserver:self
selector:@selector(appendingIsFinished:)
name:(NSString *)ResultOfAppendingTwoStringsNotification object:self];

//发送通知
[self broadcastNotification];

}