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[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWasShown:) name:UIKeyboardWillShowNotification object:nil];

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillBeHidden:) name:UIKeyboardWillHideNotification object:nil];

- (void)keyboardWasShown:(NSNotification *)aNotification{

    CGRect keyBoardFrame = [[[aNotification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];     NSLog(@"%f",keyBoardFrame.size.height);     [self changeViewFrame:keyBoardFrame.size.height]; } - (void)keyboardWillBeHidden:(NSNotification *)notif{     NSDictionary *info = [notif userInfo];     NSValue *value = [info objectForKey:UIKeyboardFrameBeginUserInfoKey];     CGSize keyboardSize = [value CGRectValue].size;     [self changeBackFrame];     NSLog(@"%f",keyboardSize.height); } -(void)changeViewFrame:(CGFloat)height{     [UIView animateWithDuration:0.3 animations:^{         CGRect frame=self.view.frame;         frame.origin.y=-height+kScreenSize.height/20-kScreenSize.height/14.23;         self.view.frame=frame;     }]; } -(void)changeBackFrame{     [UIView animateWithDuration:0.3 animations:^{         CGRect frame=self.view.frame;         frame.origin.y=0.0;         self.view.frame=frame;     }]; }

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