How can I verify that ALAsset is an image. How can I separate image files (.png) from ALAssetGroup

Question

How can I verify that ALAset is an image? How can I separate image files (.png) from ALAssetGroup.can can I only extract image files (.png) from iphone Photo libaray?

Answer 1

First of all, you need to list the entire AssetGroup. Then check each asset for 2 things:

1) To check if the object is an image, a request

[[asset valueForProperty:@"ALAssetPropertyType"] isEqualToString:@"ALAssetTypePhoto"] 

2) if 1) is true, then continue checking if it's PNG, like this:

 [[[asset defaultRepresentation] UTI] isEqualToString:@"public.png"] 

Answer 2

Without using NSString:

[[asset valueForProperty:ALAssetPropertyType] isEqual:ALAssetTypeVideo]