How to check if an ALAsset still exists using a URL

Question

I\'ve got an array containing ALAsset urls (not full ALAsset objects) So each time I start my application I want to check my array to see if it\'s still up to date...

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Answer 1

For iOS 8 or later, there is a synchronous method to check if an ALAsset exists.

@import Photos;

if ([PHAsset fetchAssetsWithALAssetURLs:@[assetURL] options:nil].count) {
    // exist
}

Swift:

import Photos

if PHAsset.fetchAssetsWithALAssetURLs([assetURL], options: nil).count > 0 {
   // exist
}

Swift 3:

import Photos

if PHAsset.fetchAssets(withALAssetURLs: [assetURL], options: nil).count > 0 {
   // exist
}