react-native-macos/Libraries/Network/RCTDataRequestHandler.h

17 строки
443 B
C
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/*
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
2015-01-30 04:10:49 +03:00
#import <React/RCTInvalidating.h>
#import <React/RCTURLRequestHandler.h>
[Image] Add onLoadStart, onLoadProgress, onLoadError events to Image component Summary: This PR adds 4 native events to NetworkImage. ![demo](http://zippy.gfycat.com/MelodicLawfulCaecilian.gif) Using these events I could wrap `Image` component into something like: ```javascript class NetworkImage extends React.Component { getInitialState() { return { downloading: false, progress: 0 } } render() { var loader = this.state.downloading ? <View style={this.props.loaderStyles}> <ActivityIndicatorIOS animating={true} size={'large'} /> <Text style={{color: '#bbb'}}>{this.state.progress}%</Text> </View> : null; return <Image source={this.props.source} onLoadStart={() => this.setState({downloading: true}) } onLoaded={() => this.setState({downloading: false}) } onLoadProgress={(e)=> this.setState({progress: Math.round(100 * e.nativeEvent.written / e.nativeEvent.total)}); onLoadError={(e)=> { alert('the image cannot be downloaded because: ', JSON.stringify(e)); this.setState({downloading: false}); }}> {loader} </Image> } } ``` Useful on slow connections and server errors. There are dozen lines of Objective C, which I don't have experience with. There are neither specific tests nor documentation yet. And I do realize that you're already working right now on better `<Image/>` (pipeline, new asset management, etc.). So this is basically a proof concept of events for images, and if this idea is not completely wrong I could improve it or help somehow. Closes https://github.com/facebook/react-native/pull/1318 Github Author: Dmitriy Loktev <unknownliveid@hotmail.com>
2015-07-09 19:48:22 +03:00
/**
* This is the default RCTURLRequestHandler implementation for data URL requests.
*/
@interface RCTDataRequestHandler : NSObject <RCTURLRequestHandler, RCTInvalidating>
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@end