UIScrollView 不滚动 [英] UIScrollView not scrolling

问题描述

我有一个 UIScrollView，其中包含许多 UIImageViews、UILabels 等......标签比 UIScrollView 长得多，但是当我运行应用程序时，我无法点击并向下滚动...

I have a UIScrollView which contains many UIImageViews, UILabels, etc... the labels are much longer that the UIScrollView, but when I run the app, I cannot click and scroll down...

为什么会这样?

谢谢

推荐答案

展示完整的工作代码片段总是好的:

It's always good to show a complete working code snippet:

// in viewDidLoad (if using Autolayout check note below):

UIScrollView *myScrollView;
UIView *contentView;
// scrollview won't scroll unless content size explicitly set

[myScrollView addSubview:contentView];//if the contentView is not already inside your scrollview in your xib/StoryBoard doc

myScrollView.contentSize = contentView.frame.size; //sets ScrollView content size

Swift 4.0

let myScrollView
let contentView

// scrollview won't scroll unless content size explicitly set

myScrollView.addSubview(contentView)//if the contentView is not already inside your scrollview in your xib/StoryBoard doc

myScrollView.contentSize = contentView.frame.size //sets ScrollView content size

我还没有找到在 IB 中设置 contentSize 的方法(从 Xcode 5.0 开始).

I have not found a way to set contentSize in IB (as of Xcode 5.0).

注意:如果您使用 Autolayout，最好将此代码放在 -(void)viewDidLayoutSubviews 方法中.

Note: If you are using Autolayout the best place to put this code is inside the -(void)viewDidLayoutSubviews method .

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