Module ImageStore-BsReactNative

IOS only

API which allows to use native iOS Image Store.

You can read more on ImageStore API usage in official docs: https://facebook.github.io/react-native/docs/imagestore

Example of use

type action =
| SetImageUri(string);

type state = {imageUri: option(string)};

let component = ReasonReact.reducerComponent("ImageExample");

let make = _children => {
  ...component,
  initialState: () => {imageUri: None},
  reducer: (action: action, _state: state) =>
    switch (action) {
    | SetImageUri(imageUri) =>
      ReasonReact.Update({imageUri: Some(imageUri)})
    },
  render: self =>
    <View>
      <Button
        onPress=(
          () => {
            ImageStore.addImageFromBase64(
              image,
              uri => self.send(SetImageUri(uri)),
              _ => (),
            );
            ();
          }
        )
        title="Set Image Uri"
      />
      (
        switch (self.state.imageUri) {
        | Some(imageUri) =>
          <Image
            source=(
              `URI(
                Image.imageURISource(
                  ~uri=imageUri,
                  ~width=200.,
                  ~height=200.,
                  (),
                ),
              )
            )
          />
        | None => ReasonReact.null
        }
      )
    </View>,
};

Methods

hasImageForTag

Checks if Image Store contains image for given tag (URI).

let hasImageForTag: (string, bool => unit) => unit;

Arguments

• First argument - image URI
• Second argument - callback which takes the boolean result as an argument

removeImageForTag

Removes image from Image Store for given tag (URI). 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

let removeImageForTag: string => unit;

Arguments

• First argument - image URI

addImageFromBase64

Adds image to Store.

let addImageFromBase64: (string, string => unit, error => unit) => string;

Arguments

• First argument - image string in base64
• Second argument - success callback which gets image URI as an aargument
• Third argument - failure callback which gets error as an argument

getBase64ForTag

Retrieves the base64-encoded image data for given tag (URI).

let getBase64ForTag: (string, string => unit, error => unit) => unit;

Arguments

• First argument - Image URI in base64
• Second argument - success callback which gets image string in base64 as an aargument
• Third argument - failure callback which gets error as an argument