Estoy creando una aplicación con UiScrollview y UIPagectontrol usando Autolayout Programmatic, para

Yo he creadoTKScroller Como subclase de UIView, lo estoy iniciando usando Some Mode and Array.

TKScroller.m

-(void)setData{

[self layoutIfNeeded];
CGRect mainFrame=self.frame;


[self layoutIfNeeded];
CGRect mainFrame=self.frame;
UIView *lastview;
NSMutableArray* manualConstraints = [NSMutableArray array];

for (int i=0; i<arrayData.count ; i++)
{
    CGRect frame;
    frame.origin.x = scrollView.frame.size.width * i;
    frame.origin.y = 0;
    frame.size = scrollView.frame.size;

    UIView *subview = [UIView new];

    subview.backgroundColor = [self getRandomColor];
    [scrollView addSubview:subview];

    if (i==0)
    {

        NSLayoutConstraint* b1_top = [NSLayoutConstraint constraintWithItem:subview attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:scrollView attribute:NSLayoutAttributeTop multiplier:1 constant:5];
        [manualConstraints addObject:b1_top];

        NSLayoutConstraint* b1_left = [NSLayoutConstraint constraintWithItem:subview attribute:NSLayoutAttributeLeading relatedBy:NSLayoutRelationEqual toItem:scrollView attribute:NSLayoutAttributeLeading multiplier:1 constant:5];
        [manualConstraints addObject:b1_left];

        NSLayoutConstraint* b1_right = [NSLayoutConstraint constraintWithItem:subview attribute:NSLayoutAttributeTrailing relatedBy:NSLayoutRelationEqual toItem:scrollView attribute:NSLayoutAttributeTrailing multiplier:1 constant:-5];
        [manualConstraints addObject:b1_right];
        NSLayoutConstraint* b1_bottom = [NSLayoutConstraint constraintWithItem:subview attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:scrollView attribute:NSLayoutAttributeTop multiplier:1 constant:-10];
        [manualConstraints addObject:b1_bottom];

        [subview layoutIfNeeded];
        [scrollView addConstraints:manualConstraints];
        lastview=subview;
    }
    else{

        NSLayoutConstraint* b1_top = [NSLayoutConstraint constraintWithItem:subview attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:scrollView attribute:NSLayoutAttributeTop multiplier:1 constant:5];
        [manualConstraints addObject:b1_top];

        NSLayoutConstraint* b1_left = [NSLayoutConstraint constraintWithItem:subview attribute:NSLayoutAttributeLeading relatedBy:NSLayoutRelationEqual toItem:lastview attribute:NSLayoutAttributeLeading multiplier:1 constant:5];
        [manualConstraints addObject:b1_left];

        NSLayoutConstraint* b1_right = [NSLayoutConstraint constraintWithItem:subview attribute:NSLayoutAttributeTrailing relatedBy:NSLayoutRelationEqual toItem:scrollView attribute:NSLayoutAttributeTrailing multiplier:1 constant:-5];
        [manualConstraints addObject:b1_right];
        NSLayoutConstraint* b1_bottom = [NSLayoutConstraint constraintWithItem:subview attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:scrollView attribute:NSLayoutAttributeTop multiplier:1 constant:-10];
        [manualConstraints addObject:b1_bottom];

        [subview layoutIfNeeded];
        [scrollView addConstraints:manualConstraints];
        lastview=subview;

    }
}

scrollView.contentSize = CGSizeMake(scrollView.frame.size.width * arrayData.count, mainFrame.size.height/2);

self.pageControl.currentPage = 0;
self.pageControl.numberOfPages = arrayData.count;

 pageControlBeingUsed = NO;
}

-(UIColor *)getRandomColor{
    int r = arc4random() % 255;
    int g = arc4random() % 255;
    int b = arc4random() % 255;
    return [UIColor colorWithRed:(r/255.0) green:(g/255.0) blue:(b/255.0) alpha:1.0];
}

En este momento estoy recibiendo subvistas,

pero si cambio la orientación, dará un resultado incorrecto, entonces, ¿cómo puedo darNSLayoutConstraint para subvistas de scrollview?

EDITAR

Después de agregarNSLayoutConstraint No se muestran subvistas. Solo me falta alguna restricción, corríjame al establecer restricciones dinámicamente.

MiEl código fuente está aquí , Por favor, ayúdame. Gracias. Y perdón por la mala gramática.