Global Variable

PHImageResultIsDegradedKey

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

Declaration

NSString *const PHImageResultIsDegradedKey;

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 YES, 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 object that you provided with the request, Photos may call your result handler block again to provide a higher-quality image.