ScrollView不滚动到视图的尽头 [英] ScrollView Not Scrolling to The End of The View

问题描述

在ViewController中，我使用StoryBoard(在ScrollView和View上设置了约束)在ScrollView中添加了一个ScrollView和一个视图.现在在我的代码中，我正在使用视图来动态添加其他视图.正在添加视图，但我的问题与滚动有关.我可以滚动，但无法滚动到最后一个视图...我尝试执行以下

In my ViewController i added a ScrollView and a view inside the ScrollView using StoryBoard (set constraints on ScrollView and the View). now in my code i am using the View to add other views dynamically. the views are being added but my question is related to scrolling. i am able to scroll but it is not scrolling to the last view... i tried doing the following

override func viewDidLayoutSubviews() {
    ScrollView.contentSize.height = contentView.frame.height
}

但是这没有用，我也注意到内容视图(我正在添加视图的视图)高度在viewDidLayoutSubviews()中打印了736，即使我添加了更多视图，这当然也应该增加它的大小.

but this did not work, also i noticed that the content view (view i am adding views to) height is printing 736 in viewDidLayoutSubviews() even when i add more views which of course should increase its size.

请提供任何帮助.

我正在将视图添加到内容视图中，如下所示:

i am adding the views to content view like this:

let Description = UILabel(frame: CGRectMake(20, CGFloat(position), self.view.frame.size.width-40, 40))
Description.addConstraint(NSLayoutConstraint(item: view, attribute: .Height, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1, constant: 40))
Description.addConstraint(NSLayoutConstraint(item: view, attribute: .Width, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1, constant: self.view.frame.size.width-40))
contentView.addSubview(Description)
// i don't know if i should add constraints but i added anyway

推荐答案

成功了！

像这样编辑viewDidLayoutSubviews:

edit the viewDidLayoutSubviews like this:

 override func viewDidLayoutSubviews() {

        self.view.setupContentViewForViewWithScroll(contentView: contentView)

        let lastView : UIView! = contentView.subviews.last
        let height = lastView.frame.size.height
        let pos = lastView.frame.origin.y
        let sizeOfContent = height + pos + 10

        ScrollView.contentSize.height = sizeOfContent

    }

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