UIScrollView+九宫格

UIScrollView *scrollView = [UIScrollView new];
scrollView.backgroundColor = [UIColor whiteColor];
[sv addSubview:scrollView];
[scrollView mas_makeConstraints:^(MASConstraintMaker *make) {
   make.edges.equalTo(sv).with.insets(UIEdgeInsetsMake(5,5,5,5));
}];

UIView *container = [UIView new];
[scrollView addSubview:container];
[container mas_makeConstraints:^(MASConstraintMaker *make) {
    make.edges.equalTo(scrollView);
    make.width.equalTo(scrollView);
}];

int count = 10;
UIView *lastView = nil;
for ( int i = 1 ; i <= count ; ++i )
{
    UIView *subv = [UIView new];
    [container addSubview:subv];
    subv.backgroundColor = [UIColor colorWithHue:( arc4random() % 256 / 256.0 )
                                      saturation:( arc4random() % 128 / 256.0 ) + 0.5
                                      brightness:( arc4random() % 128 / 256.0 ) + 0.5
                                           alpha:1];
    
    [subv mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.and.right.equalTo(container);
        make.height.mas_equalTo(@(20*i));
        
        if ( lastView )
        {
            make.top.mas_equalTo(lastView.mas_bottom);
        }
        else
        {
            make.top.mas_equalTo(container.mas_top);
        }
    }];
    
    lastView = subv;
}

[container mas_makeConstraints:^(MASConstraintMaker *make) {
    make.bottom.equalTo(lastView.mas_bottom);
}];