Setting Keyboard Hight same even in Enlarged App

SetKeyboardHeight.m

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.translatesAutoresizingMaskIntoConstraints = NO;
    if (self.traitCollection.userInterfaceIdiom == UIUserInterfaceIdiomPad) {
        self.portraitHeightRate = [UIScreen mainScreen].bounds.size.width * .4 / [UIScreen mainScreen].bounds.size.height;
    }else{
        if (([UIScreen mainScreen].bounds.size.width + [UIScreen mainScreen].bounds.size.height)>1100) {
            self.portraitHeightRate = [UIScreen mainScreen].bounds.size.width * .6 / [UIScreen mainScreen].bounds.size.height;
        } else if (([UIScreen mainScreen].bounds.size.width + [UIScreen mainScreen].bounds.size.height)>950) {
            self.portraitHeightRate = [UIScreen mainScreen].bounds.size.width * .75 / [UIScreen mainScreen].bounds.size.height;
        } else {
            self.portraitHeightRate = [UIScreen mainScreen].bounds.size.width * .85 / [UIScreen mainScreen].bounds.size.height;
        }
    }
    if (self.landscapeHeightRate ==0) {
        if (self.traitCollection.userInterfaceIdiom == UIUserInterfaceIdiomPad) {
            self.landscapeHeightRate = [UIScreen mainScreen].bounds.size.width * .45 / [UIScreen mainScreen].bounds.size.height;
        }else{
            self.landscapeHeightRate = .5;
        }
    }
}
- (CGFloat) calcuratedHeight {
    if (self.traitCollection.userInterfaceIdiom == UIUserInterfaceIdiomPhone) {
        if([self isPortrait]){
            return ((int) (self.portraitHeightRate * [UIScreen mainScreen].bounds.size.height * self.view.bounds.size.width / [UIScreen mainScreen].bounds.size.width / 10.0))*10;
        }else{
            return ((int) (self.landscapeHeightRate * [UIScreen mainScreen].bounds.size.height * self.view.bounds.size.width / [UIScreen mainScreen].bounds.size.width / 10.0))*10;
        }
    }
    if (self.traitCollection.userInterfaceIdiom == UIUserInterfaceIdiomPad) {
        if([self isPortrait]){
            return ((int) (self.portraitHeightRate * [UIScreen mainScreen].bounds.size.height * self.view.bounds.size.width / [UIScreen mainScreen].bounds.size.width / 10.0))*10;
        }else{
            return ((int) (self.landscapeHeightRate * [UIScreen mainScreen].bounds.size.height * self.view.bounds.size.width / [UIScreen mainScreen].bounds.size.width / 10.0))*10;
        }
    }
    return 200;
}