scrollView不滚动到底部滚动视图上的内容视图不是滚动

Question

i have developed that scroll view as making view of viewController sige 320 & 840 and i placed scrolview and contents

   _scrollMainView.showsHorizontalScrollIndicator=NO;
 _scrollMainView.delegate=self;
_scrollMainView.indicatorStyle=UIScrollViewIndicatorStyleWhite;
_scrollMainView.contentSize=CGSizeMake(320, 850);

Answer 1

Your scroll view contents one container view and other views (Collection view and labels)

To scroll content as expected your view hierarchy should be like following

1. Main View
2. ScrollView

2.1 Container View

2.1.1 Other Views which you actually want to display in scroll view (in your case collections views and labels should be in container view)

If you don't want to use auto layout then you need to fix frame of scroll view and increase height of container to display all other content

use auto resizing to set scroll view's frame

And if you want to use autolayout then pin scroll view from 4 sides to main view then pin container view from 4 side to scroll view and then add equal heights to scroll view for container

then select height constraint of container view and decrease its priority to 250 OR add constant height to container view as per your need Now you are good to go