How to clear all cached images loaded from SDWebImage?

Question

I have all images loaded on my app via SDWebImage. The downloading and caching works great, but I wanted to make a button that can clear all cached images in the entire app.

I have a "Clear Cache" button as a UIButton on one of my tab bar views. How can I make it so when this button is tapped, all the cached images are removed and need to be re-downloaded?

Using Swift.

Thank you!

Exalt

Answer 1

If you want to completely clear the cache do the following:

Obj-c:

- (IBAction)clearCache:(id)sender {
    [[SDImageCache sharedImageCache]clearMemory];
    [[SDImageCache sharedImageCache]clearDisk];
}

Swift 5

SDImageCache.shared.clearMemory()
SDImageCache.shared.clearDisk()

Swift 3.0

@IBAction func clearCache(sender: UIButton) {
    SDImageCache.shared().clearMemory()
    SDImageCache.shared().clearDisk()
}

Endocrine

Thanks for the response. How would I link this up to a UIButton? Would it be through an outlet? – Exalt

Will try this. Thank you! – Exalt

Is SDWebimage library manage automatic remove images from the cached? If we are not using any more since 2 to 3 days and more. – Catherin

FYI, clearDisk has been changed to clearDiskOnCompletion:. – Fitzhugh

@Fitzhugh the declaration is func clearDisk(onCompletion completion: SDWebImageNoParamsBlock? = nil), so the onCompletion parameter can be omitted. – Snow

Answer 2

Try this:

@IBAction func actClearCache(sender:AnyObject) {

   let objCache = SDImageCache.sharedImageCache()
   objCache.clearMemory()
   objCache.cleanDisk()

}

Labialized

Thanks for the response. How can I link this up to a UIButton? Would it be through an outlet? – Exalt

Got it, thanks! I am getting an error that says: Use of unresolved identifier 'SDImageCache'. Would I need to import it in my bridging header? – Exalt

Have you ‘import SDWebImage`? And which swift version are you using? – Labialized

Here's my bridging header: #import "SDWebImage/UIImageView+WebCache.h" #import "SDWebImane" It says that 'SdWebImane' file not found – Exalt

I imported SDWebImage, and I think I'm using Swift 2.2 – Exalt

I didn't write "import SDWebImage" on the .swift file attached to the View controller. It works now that I've wrote it! – Exalt

As of this date cleanDisk and clearDisk are missing from SDImageCache.h. But they're still in cocoadocs.org/docsets/SDWebImage/3.3/Classes/SDImageCache.html#/… – Probation

Answer 3

To delete all data from cache

SDImageCache.shared.clear(with: .all) {
    print("Disk & memory data cleared")
}

To delete data from only memory

SDImageCache.shared.clear(with: .memory) {
    print("Memory data cleared")
}

To delete data from disk

SDImageCache.shared.clear(with: .disk) {
    print("Disk data cleared")
}

Bacteriology

Answer 4

Swift 4.2 , Xcode 10

pod 'SDWebImage', '5.0.0-beta3'

import SDWebImage

 @IBAction func ClearCacheButtonClick(_ sender: UIButton) {
     SDImageCache.shared.clearMemory()
     SDImageCache.shared.clearDisk()
 }

Ruhl

Answer 5

Swift 5

import SDWebImage

  SDImageCache.shared.clearMemory()

  SDImageCache.shared.clearDisk()

Calif