将图像大小限制为ScrollView,Swift

您是否引用了UIImageView?如果是这样,则将其内容模式设置为aspect fit。这样地:

        theImageView.contentMode = .scaleAspectFit

那么,如果您没有对UIImageView的引用呢?。。。 您可以遍历滚动视图的子视图,每当它找到UIImageView时,您可以这样设置内容模式。类似于:

//This is off the top of my head, so my filtering may not be right...
//This is also a one and done solution if you've got a lot of images in your scroll view
for anImgVw in imageScrollView.subviews.filter({$0.isKind(of: UIImageView.self)})
{
    anImgVw.contentMode = .scaleAspectFit
}

否则,我不确定如果不引用UIImageView是否可行。

您使用的库编码为使缩放与设备方向相匹配。那么,如果 方向与 看法 方向,您最终会发现图像在滚动视图中不太合适。

您需要编辑 ImageScrollView.swift 源文件。假设您使用的版本与当前提供的链接中的版本相同( https://github.com/huynguyencong/ImageScrollView ),更改 setMaxMinZoomScalesForCurrentBounds() 功能如下:

fileprivate func setMaxMinZoomScalesForCurrentBounds() {
    // calculate min/max zoomscale
    let xScale = bounds.width / imageSize.width    // the scale needed to perfectly fit the image width-wise
    let yScale = bounds.height / imageSize.height   // the scale needed to perfectly fit the image height-wise

    // fill width if the image and phone are both portrait or both landscape; otherwise take smaller scale
    //let imagePortrait = imageSize.height > imageSize.width
    //let phonePortrait = bounds.height >= bounds.width
    //var minScale = (imagePortrait == phonePortrait) ? xScale : min(xScale, yScale)
    //
    // just take the min scale, so the image will completely fit regardless of orientation
    var minScale = min(xScale, yScale)

    let maxScale = maxScaleFromMinScale*minScale

    // don't let minScale exceed maxScale. (If the image is smaller than the screen, we don't want to force it to be zoomed.)
    if minScale > maxScale {
        minScale = maxScale
    }

    maximumZoomScale = maxScale
    minimumZoomScale = minScale * 0.999 // the multiply factor to prevent user cannot scroll page while they use this control in UIPageViewController
}

let screenSize: CGRect = UIScreen.mainScreen().bounds
let screenWidth = screenSize.width
let screenHeight = screenSize.height

imageScrollView.frame = CGRect(x: 0, y: 0, width: viewWidth, height: screenHeight-50)