Update Image API
Summary: - Provide runnable examples - Add more details to properties and jsdoc-ify the methods Ref #8203 Closes https://github.com/facebook/react-native/pull/8413 Differential Revision: D3482168 Pulled By: caabernathy fbshipit-source-id: 04fce5133317af282cced5850a53858e3f5b72f2
This commit is contained in:
Joel Marcey
Facebook Github Bot 2
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commit
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@ -34,27 +34,72 @@ const ImageViewManager = NativeModules.ImageViewManager;
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* including network images, static resources, temporary local images, and
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* images from local disk, such as the camera roll.
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*
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* Example usage:
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* This exmaples shows both fetching and displaying an image from local storage as well as on from
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* network.
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*
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* ```
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* renderImages: function() {
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* ```ReactNativeWebPlayer
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* import React, { Component } from 'react';
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* import { AppRegistry, View, Image } from 'react-native';
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*
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* class DisplayAnImage extends Component {
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* render() {
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* return (
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* <View>
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* <Image
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* style={styles.icon}
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* source={require('./myIcon.png')}
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* source={require('./img/favicon.png')}
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* />
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* <Image
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* style={styles.logo}
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* source={{uri: 'http://facebook.github.io/react/img/logo_og.png'}}
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* />
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* </View>
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* );
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* },
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* }
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* }
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*
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* // App registration and rendering
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* AppRegistry.registerComponent('DisplayAnImage', () => DisplayAnImage);
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* ```
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*
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* You can also add `style` to an image:
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*
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* ```ReactNativeWebPlayer
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* import React, { Component } from 'react';
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* import { AppRegistry, View, Image, StyleSheet} from 'react-native';
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*
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* const styles = StyleSheet.create({
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* stretch: {
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* width: 50,
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* height: 200
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* }
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* });
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*
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*class DisplayAnImageWithStyle extends Component {
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* render() {
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* return (
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* <View>
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* <Image
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* style={styles.stretch}
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* source={require('./img/favicon.png')}
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* />
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* </View>
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* );
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* }
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* }
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*
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* // App registration and rendering
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* AppRegistry.registerComponent(
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* 'DisplayAnImageWithStyle',
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* () => DisplayAnImageWithStyle
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* );
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* ```
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*/
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const Image = React.createClass({
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propTypes: {
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/**
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* > `ImageResizeMode` is an `Enum` for different image resizing modes, set via the
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* > `resizeMode` style property on `Image` components. The values are `contain`, `cover`,
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* > `stretch`, `center`, `repeat`.
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*/
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style: StyleSheetPropType(ImageStylePropTypes),
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/**
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* The image source (either a remote URL or a local file resource).
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@ -62,29 +107,26 @@ const Image = React.createClass({
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source: ImageSourcePropType,
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/**
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* A static image to display while loading the image source.
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*
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* - `uri` - a string representing the resource identifier for the image, which
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* should be either a local file path or the name of a static image resource
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* (which should be wrapped in the `require('./path/to/image.png')` function).
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* - `width`, `height` - can be specified if known at build time, in which case
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* these will be used to set the default `<Image/>` component dimensions.
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* - `scale` - used to indicate the scale factor of the image. Defaults to 1.0 if
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* unspecified, meaning that one image pixel equates to one display point / DIP.
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* - `number` - Opaque type returned by something like `require('./image.jpg')`.
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*
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* @platform ios
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*/
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defaultSource: PropTypes.oneOfType([
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// TODO: Tooling to support documenting these directly and having them display in the docs.
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PropTypes.shape({
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/**
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* `uri` is a string representing the resource identifier for the image, which
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* should be either a local file path or the name of a static image resource
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* (which should be wrapped in the `require('./path/to/image.png')` function).
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*/
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uri: PropTypes.string,
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/**
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* `width` and `height` can be specified if known at build time, in which case
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* these will be used to set the default `<Image/>` component dimensions.
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*/
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width: PropTypes.number,
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height: PropTypes.number,
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/**
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* `scale` is used to indicate the scale factor of the image. Defaults to 1.0 if
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* unspecified, meaning that one image pixel equates to one display point / DIP.
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*/
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scale: PropTypes.number,
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}),
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// Opaque type returned by require('./image.jpg')
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PropTypes.number,
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]),
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/**
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@ -105,10 +147,11 @@ const Image = React.createClass({
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blurRadius: PropTypes.number,
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/**
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* When the image is resized, the corners of the size specified
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* by capInsets will stay a fixed size, but the center content and borders
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* by `capInsets` will stay a fixed size, but the center content and borders
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* of the image will be stretched. This is useful for creating resizable
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* rounded buttons, shadows, and other resizable assets. More info on
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* [Apple documentation](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIImage_Class/index.html#//apple_ref/occ/instm/UIImage/resizableImageWithCapInsets)
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* rounded buttons, shadows, and other resizable assets. More info in the
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* [official Apple documentation](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIImage_Class/index.html#//apple_ref/occ/instm/UIImage/resizableImageWithCapInsets).
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*
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* @platform ios
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*/
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capInsets: EdgeInsetsPropType,
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@ -116,18 +159,18 @@ const Image = React.createClass({
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* Determines how to resize the image when the frame doesn't match the raw
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* image dimensions.
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*
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* 'cover': Scale the image uniformly (maintain the image's aspect ratio)
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* - `cover`: Scale the image uniformly (maintain the image's aspect ratio)
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* so that both dimensions (width and height) of the image will be equal
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* to or larger than the corresponding dimension of the view (minus padding).
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*
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* 'contain': Scale the image uniformly (maintain the image's aspect ratio)
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* - `contain`: Scale the image uniformly (maintain the image's aspect ratio)
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* so that both dimensions (width and height) of the image will be equal to
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* or less than the corresponding dimension of the view (minus padding).
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*
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* 'stretch': Scale width and height independently, This may change the
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* - `stretch`: Scale width and height independently, This may change the
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* aspect ratio of the src.
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*
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* 'repeat': Repeat the image to cover the frame of the view. The
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* - `repeat`: Repeat the image to cover the frame of the view. The
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* image will keep it's size and aspect ratio. (iOS only)
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*/
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resizeMode: PropTypes.oneOf(['cover', 'contain', 'stretch', 'repeat']),
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@ -142,25 +185,27 @@ const Image = React.createClass({
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*/
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onLayout: PropTypes.func,
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/**
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* Invoked on load start
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* Invoked on load start.
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*
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* e.g., `onLoadStart={(e) => this.setState({loading: true})}`
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*/
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onLoadStart: PropTypes.func,
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/**
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* Invoked on download progress with `{nativeEvent: {loaded, total}}`
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* Invoked on download progress with `{nativeEvent: {loaded, total}}`.
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* @platform ios
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*/
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onProgress: PropTypes.func,
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/**
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* Invoked on load error with `{nativeEvent: {error}}`
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* Invoked on load error with `{nativeEvent: {error}}`.
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* @platform ios
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*/
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onError: PropTypes.func,
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/**
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* Invoked when load completes successfully
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* Invoked when load completes successfully.
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*/
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onLoad: PropTypes.func,
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/**
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* Invoked when load either succeeds or fails
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* Invoked when load either succeeds or fails.
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*/
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onLoadEnd: PropTypes.func,
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},
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@ -178,6 +223,14 @@ const Image = React.createClass({
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* does not fully load/download the image data. A proper, supported way to
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* preload images will be provided as a separate API.
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*
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* @param uri The location of the image.
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* @param success The function that will be called if the image was sucessfully found and width
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* and height retrieved.
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* @param failure The function that will be called if there was an error, such as failing to
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* to retrieve the image.
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*
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* @returns void
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*
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* @platform ios
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*/
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getSize: function(
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@ -192,6 +245,10 @@ const Image = React.createClass({
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/**
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* Prefetches a remote image for later use by downloading it to the disk
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* cache
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*
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* @param url The remote location of the image.
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*
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* @return The prefetched image.
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*/
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prefetch(url: string) {
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return ImageViewManager.prefetchImage(url);
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