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# PHImageResultIsDegradedKey

A key whose value indicates whether the result image is a low-quality substitute for the requested image.

```
let PHImageResultIsDegradedKey: String
```

## Discussion

This key provides information about an image loading result in the `resultHandler` block for methods listed in Requesting Images. The corresponding value is an `NSNumber` object containing a Boolean value.If `true`, the `result` parameter of your `resultHandler` block contains a low-quality image because Photos could not yet provide a higher-quality image. Depending on your settings in the [`PHImageRequestOptions`](/documentation/Photos/PHImageRequestOptions) object that you provided with the request, Photos may call your result handler block again to provide a higher-quality image.

---

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