Question

所以我的UIViewController嵌入在导航控制器中。我以编程方式添加导航按钮，现在尝试在此导航栏下方添加scrollView。我遇到的问题是填充整个帧大小并进入导航栏。

如何以编程方式设置此滚动视图的约束？

var scrollView: UIScrollView!
var containerView = UIView()

override func viewDidLoad() {
    super.viewDidLoad()
    self.navigationItem.title = "Filters"
    // add some buttons on the navigation

    self.scrollView = UIScrollView()
    self.scrollView.backgroundColor = UIColor.grayColor()
    self.scrollView.contentSize = CGSizeMake(self.view.frame.size.width, self.view.frame.size.height)

    containerView = UIView()

    scrollView.addSubview(containerView)
    view.addSubview(scrollView)

    let label = UILabel(frame: CGRectMake(0, 0, 100, 21))
    label.text = "my label"
    containerView.addSubview(label)
}

Answer 1

我设法让这个在iOS11上运行的唯一方法是这样的

if (@available(iOS 11.0, *)) {
    scrollView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
} else {
    // Fallback on earlier versions
}

Answer 2

使用auto-layout时，只需确保top-constraint UIScrollView Top Layout Guide superview，而不是<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <WebView android:id="@+id/webview" android:layout_width="fill_parent" android:layout_height="fill_parent" /> <ProgressBar android:id="@+id/progressBar1" style="?android:attr/progressBarStyleLarge" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:layout_centerInParent="true" /> </RelativeLayout>滚动视图。

Answer 3

在Swift 5中

let scrollView = UIScrollView()
scrollView.translatesAutoresizingMaskIntoConstraints = false
scrollView.addSubview(imageView)
scrollView.contentInsetAdjustmentBehavior = .never

NSLayoutConstraint.activate([
    scrollView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor)
])

Answer 4

使用contentInset的{{1}}属性。例如，如果你想在顶部有44个点的差距：

UIScrollView

Swift iOS以编程方式在导航栏下方设置scrollView约束

4 个答案: