Question

我正在使用Swift3创建应用，并且我很难为UIScrollView正确定义高度，我使用autolayout并创建此结构：< / p>

UIScrollView
- UIView //容器view
- UIImageView // Constraint热门边缘= 20与UIView相关
- UITextView // Constraint热门边缘= 40与UIImageView相关
- UITextView // Constraint热门边缘= 20与UITextView相关
- UIButton // Constraint与UITextView相关的热门边缘30

目前，我正在使用此逻辑来计算UIScrollView身高

override func viewDidLayoutSubviews() {
    var scrollHeight : CGFloat = 0.0

    for view in self.containerView.subviews {
        view.layoutIfNeeded()
        scrollHeight += view.frame.size.height
    }

    // Adding height for scrollview, according to the sum of all child views
    self.scrollView.contentSize.height = scrollHeight

}

但是，我只能得到views高度，而他们不考虑Constraints＆＃34;边距＆＃34;，我想知道任何方法来计算{{1}的正确高度根据其内容进行调整。

Answer 1

关闭！让我们为每个视图添加上边距：

override func viewDidLayoutSubviews() {
    var scrollHeight : CGFloat = 0.0

    for view in self.containerView.subviews {
        view.layoutIfNeeded()
        scrollHeight += view.frame.size.height

        //Add the margins as well to the scrollHeight
        scrollHeight += view.layoutMargins.top
    }

    // Adding height for scrollview, according to the sum of all child views
    self.scrollView.contentSize = CGRect(x: self.scrollView.contentSize.width, y: scrollHeight)
}

Answer 2

self.scrollview.contentsize.height = containerview.height;

为UIScrollView正确定义高度

2 个答案: