停止 ScrollView 越过 &低于界限 [英] Stopping ScrollView Going Above & Below The Bounds

问题描述

我在 ViewController 中创建了一个 UIScrollView 并添加了 UIView &UITableView 作为 ViewController 的兄弟.

I created a UIScrollView in a ViewController and added UIView & UITableView as siblings of ViewController.

 var pageSize = view.bounds.size

 // MiniQuestion: I disabled vertical indicators but it caused a gap for the width
 // of the indicator, so I added the gap manually. Is it okay behaviour?
 pageSize.width += 5


 MyView.backgroundColor = UIColor.redColor()
 MyTableView.backgroundColor = UIColor.blueColor()

 let pagesViews = [MyView , MyTableView]
 let numberOfPages = pagesViews.count

 for (pageIndex,page) in pagesViews.enumerate(){
    page.frame = CGRect(origin: CGPoint(x:0 , y:CGFloat(pageIndex) * pageSize.height), size: pageSize)
    ScrollView.addSubview(page)
 }

 ScrollView.contentSize = CGSize(width: pageSize.width, height: pageSize.height * CGFloat(numberOfPages))

效果很好.除了，即使我有 2 个页面并向 ScrollView 添加了约束，它也会在顶部页面上方(当我拉更多时)和在 tableview 页面的末尾下方(当我推更多时).但是我想将它滚动到 tableview 的末尾并卡在顶部的边界处.

It's working nice. Except, even though I have 2 pages and added constraints to ScrollView, it's going above the top page (when I pull more) and below the end of tableview page (when I push more). However I want to scroll it until the end of the tableview and stuck at the bound of the top.

通常它们看起来不错......但是，

Normally they look fine... However,

如果我超越顶部:

如果我推到底部:

如何防止这种行为?

推荐答案

如果您不想让用户将其拉出滚动视图的边界，则:

If you don't want to enable user to pull it beyond the bounds of scroll view then:

ScrollView.bounces = false

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