Question

我从网上抓取了很多图片，它们都是各种尺寸 - 它们可以是大的，小的等等。

所以当我在单元格中显示它们时我可以调整它们的大小，但这样效率很低。在SDWebImage下载它们并缓存它们的大小后，更好地调整它们的大小，而不是将大图像存储在磁盘上并为每个单元调整大小。

那么我怎么能用SDWebImage做到这一点，或者我不得不在课堂上进行一些修改？

Answer 1

SDWebImage开发人员Olivier Poitrey为我回答了这个问题here。

您必须实现SDWebImageManagerDelegate协议，然后将其设置为共享管理器的委托，如下所示：

SDWebImageManager.sharedManager.delegate = self;

using the imageManager:transformDownloadedImage:withURL: instance method.

More information.

完美地为我工作。

Answer 2

我遇到了和你一样的问题，并尝试首先调整SDWebImage，但最终构建了我自己的组件来解决问题。您可以在此处查看：https://github.com/adig/RemoteImageView

Answer 3

SDWebImage 3.8.2

如果使用UIImageView类别<Guid("$guid1$")> _ <ComVisible(True)> _ <SwAddin( _ Description:="$safeprojectname$ description", _ Title:="$safeprojectname$", _ LoadAtStartup:=True _ )> _ Public Class SwAddin Implements SolidWorks.Interop.swpublished.SwAddin #Region "SolidWorks Registration" <ComRegisterFunction()> Public Shared Sub RegisterFunction(ByVal t As Type) ' Get Custom Attribute: SwAddinAttribute Dim attributes() As Object Dim SWattr As SwAddinAttribute = Nothing attributes = System.Attribute.GetCustomAttributes(GetType(SwAddin), GetType(SwAddinAttribute)) If attributes.Length > 0 Then SWattr = DirectCast(attributes(0), SwAddinAttribute) End If Try Dim hklm As Microsoft.Win32.RegistryKey = Microsoft.Win32.Registry.LocalMachine Dim hkcu As Microsoft.Win32.RegistryKey = Microsoft.Win32.Registry.CurrentUser Dim keyname As String = "SOFTWARE\SolidWorks\Addins\{" + t.GUID.ToString() + "}" Dim addinkey As Microsoft.Win32.RegistryKey = hklm.CreateSubKey(keyname) addinkey.SetValue(Nothing, 0) addinkey.SetValue("Description", SWattr.Description) addinkey.SetValue("Title", SWattr.Title) keyname = "Software\SolidWorks\AddInsStartup\{" + t.GUID.ToString() + "}" addinkey = hkcu.CreateSubKey(keyname) addinkey.SetValue(Nothing, SWattr.LoadAtStartup, Microsoft.Win32.RegistryValueKind.DWord) Catch nl As System.NullReferenceException Console.WriteLine("There was a problem registering this dll: SWattr is null.\n " & nl.Message) System.Windows.Forms.MessageBox.Show("There was a problem registering this dll: SWattr is null.\n" & nl.Message) Catch e As System.Exception Console.WriteLine("There was a problem registering this dll: " & e.Message) System.Windows.Forms.MessageBox.Show("There was a problem registering this dll: " & e.Message) End Try End Sub <ComUnregisterFunction()> Public Shared Sub UnregisterFunction(ByVal t As Type) Try Dim hklm As Microsoft.Win32.RegistryKey = Microsoft.Win32.Registry.LocalMachine Dim hkcu As Microsoft.Win32.RegistryKey = Microsoft.Win32.Registry.CurrentUser Dim keyname As String = "SOFTWARE\SolidWorks\Addins\{" + t.GUID.ToString() + "}" hklm.DeleteSubKey(keyname) keyname = "Software\SolidWorks\AddInsStartup\{" + t.GUID.ToString() + "}" hkcu.DeleteSubKey(keyname) Catch nl As System.NullReferenceException Console.WriteLine("There was a problem unregistering this dll: SWattr is null.\n " & nl.Message) System.Windows.Forms.MessageBox.Show("There was a problem unregistering this dll: SWattr is null.\n" & nl.Message) Catch e As System.Exception Console.WriteLine("There was a problem unregistering this dll: " & e.Message) System.Windows.Forms.MessageBox.Show("There was a problem unregistering this dll: " & e.Message) End Try End Sub。我创建了另一个UIImageView类别（扩展名）

sd_setImageWithURL

Answer 4

扩展MaeSTRo在 Swift 3 中的回答：

myImageView.sd_setImage(with: imageUrl){ (image, error, cacheType, url) in
    guard let image = image, cacheType == .none else { return }

    DispatchQueue.global(qos: .userInitiated).async {
        let modifiedImage = myImageProcessor(image)
        SDWebImageManager.shared().saveImage(toCache: modifiedImage, for: imageUrl)
        DispatchQueue.main.async {
            myImageView.image = modifiedImage
            myImageView.setNeedsDisplay()
        }
    }
}

SDWebImage在缓存之前处理图像

4 个答案: