(ios)nsnotification总结

 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];}-(void)keyboardWillShow:(NSNotification *)aNotification{    CGRect keyBoardRect=[[[aNotification userInfo]objectForKey:UIKeyboardFrameBeginUserInfoKey]CGRectValue];        NSTimeInterval animalInterval=[[[aNotification userInfo]objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];    CGRect frame=self.view.frame;    frame.origin.y=-keyBoardRect.size.height;    [UIView beginAnimations:@"keyboardshow" context:nil];    [UIView setAnimationDuration:animalInterval];    self.view.frame=frame;    [UIView commitAnimations];}-(void)keyboardWillHide:(NSNotification *)aNotification{    NSTimeInterval animalInterval=[[[aNotification userInfo]objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];    CGRect frame=self.view.frame;    frame.origin.y=0;    [UIView beginAnimations:@"keyboardhide" context:nil];    [UIView setAnimationDuration:animalInterval];    self.view.frame=frame;    [UIView commitAnimations];    }

    self.textbox.returnKeyType=UIReturnKeyDone;    self.textbox.delegate=self;} - (BOOL)textFieldShouldReturn:(UITextView *)textView{ [textView resignFirstResponder];    return YES;}

//注册观察者，侦听自定义通知    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(selfNotificationDO:) name:@"CustomNotification" object:nil];}-(void)selfNotificationDO:(NSNotification *)aNotification{     //处理notification    //........}

//生成一个自定义Notification    [[NSNotificationCenter defaultCenter] postNotificationName:@"CustomNotification" object:self];