将 UIImageView 添加到 UIScrollView

Question

希望有人能指出这有什么问题。

我的故事板有一个 UIScrollView 名为 timelineScrollView 和一个 UIImageView 名为 imageviewtest。

我正在创建一个图像，它是一条简单的直线。如果我将它添加到 UIImageView 它显示正常。但是，如果我将它添加到 UIScrollView，则不会显示任何内容。

如何让它显示在 UIScrollView 中？

func drawingTest(){

    let drawing = DrawingHelper()
    let imageSize2 = CGSize(width: 100, height: 60)
    let fromPoint: CGPoint = CGPoint(x: 0, y:0)
    let toPoint: CGPoint = CGPoint(x: 50, y:0)


    imageviewtest.image = drawing.drawLine(fromPoint, toPoint: toPoint, imageSize: imageSize2)

    var imageView = UIImageView()
    var image = drawing.drawLine(fromPoint, toPoint: toPoint, imageSize: imageSize2)
    imageView.image = image;


    var scrollViewAreaSize = CGSize(width: 100, height: 60)
    timelineScrollView.contentSize = scrollViewAreaSize
    timelineScrollView.addSubview(imageView)
}

Answer 1

为您的图像视图设置适当的框架或使用您的图像初始化 UIImageView：

var image = drawing.drawLine(fromPoint, toPoint: toPoint, imageSize: imageSize2)
var imageView = UIImageView(image:image)

来自documentation：

This method adjusts the frame of the receiver to match the size of the specified image.

将 UIImageView 添加到 UIScrollView

Add UIImageView to UIScrollView

xcode

uiscrollview

uiimageview

ios

swift