ImageStore
Deprecated. Use expo-file-system or react-native-fs instead.
Methods
Reference
Methods
hasImageForTag()
static hasImageForTag(uri, callback)
Check if the ImageStore contains image data for the specified URI. @platform ios
removeImageForTag()
static removeImageForTag(uri)
Delete an image from the ImageStore. Images are stored in memory and must be manually removed when you are finished with them, otherwise they will continue to use up RAM until the app is terminated. It is safe to call removeImageForTag() without first calling hasImageForTag(), it will simply fail silently. @platform ios
addImageFromBase64()
static addImageFromBase64(base64ImageData, success, failure)
Stores a base64-encoded image in the ImageStore, and returns a URI that can be used to access or display the image later. Images are stored in memory only, and must be manually deleted when you are finished with them by calling removeImageForTag().
Note that it is very inefficient to transfer large quantities of binary data between JS and native code, so you should avoid calling this more than necessary. @platform ios
getBase64ForTag()
static getBase64ForTag(uri, success, failure)
Retrieves the base64-encoded data for an image in the ImageStore. If the specified URI does not match an image in the store, the failure callback will be called.
Note that it is very inefficient to transfer large quantities of binary data between JS and native code, so you should avoid calling this more than necessary. To display an image in the ImageStore, you can just pass the URI to an <Image/> component; there is no need to retrieve the base64 data.