IOS getting keyboard-related information

One, add monitoring where needed

[[Nsnotificationcenter Defaultcenter] addobserver:self selector: @selector (onkeyboardwillshownotification:)                                                 Name:uikeyboardwillshownotification Object:nil]; [[Nsnotificationcenter Defaultcenter] addobserver:self selector: @selector (onkeyboardwillhidenotification:)                                                 Name:uikeyboardwillhidenotification Object:nil];

Second, the response monitoring method

-(void) Onkeyboardwillshownotification: (nsnotification*) notify {    Nsdictionary *userinfodic = [notify UserInfo];    NSLog (@ "userinfodic =%@", userinfodic);    CGFloat timerval = [[Userinfodic Objectforkey:uikeyboardanimationdurationuserinfokey] floatValue];    Nsvalue *keyboardframevalue = [Userinfodic Objectforkey:uikeyboardframeenduserinfokey];    CGRect keyboardframe = [Keyboardframevalue cgrectvalue];    [UIView animatewithduration:timerval animations:^ (void) {        self.containerView.frame = CGRectMake (self.containerview.frame.origin.x, SELF.CONTAINERVIEW.FRAME.ORIGIN.Y- KeyboardFrame.size.height, Self.containerView.frame.size.width, self.containerView.frame.size.height);    }];}

IOS getting keyboard-related information