TopicBoard.js
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import React, {Component} from "react";
import {
ActivityIndicator,
DeviceEventEmitter,
Image,
ImageBackground,
StyleSheet,
Text,
TouchableOpacity,
View
} from "react-native";
import {zoomH, zoomW} from '../../utils/getSize';
import TopicInfoUtil from '../component/topicInfo';
import HomeList from "../../pages/home/HomeList";
import {NoDoublePress} from "../../utils/utils";
var InfoBg = ImageBackground;
var deEmitter = DeviceEventEmitter;
//图片资源
const backArrow = require('../../img/backWhite.png');
// 变量定义
{
let parm_topicId = 0
}
export default class TopicBoard extends Component {
static navigationOptions = ({ navigation, screenProps }) => ({
header:null,
});
constructor(props){
super(props);
parm_topicId = this.props.navigation.state.params.id;
TopicInfoUtil.parm_topicId = parm_topicId;
this.state = {
// 信息区域的背景图
imgUrl:'',
infoLoading:true,
listLoading:true
};
};
componentWillMount(){
};
componentDidMount(){
//设置头部
this.props.navigation.setParams({
back:()=>{
this.props.navigation.goBack();
},
});
let _this = this;
this.deEmitter = DeviceEventEmitter.addListener('getTopicInfo', (url) => {
console.log('getTopicInfo' + url);
_this.setState({
imgUrl:url,
infoLoading:false
})
});
this.deEmitter = DeviceEventEmitter.addListener('getTopicList', () => {
console.log('收到通知getTopicList：');
_this.setState({
listLoading:false
})
});
}
componentWillUnmount(){
this.deEmitter.remove();
}
onBackPress(){
this.props.navigation.goBack();
}
render() {
return(
<View style = {styles.background}>
{/*话题信息区域背景图*/}
<InfoBg style = {styles.infoBg} source = {{uri:this.state.imgUrl}}>
<View style = {{position:'absolute',width:'100%',height:'100%',backgroundColor:'rgba(0,0,0,0.25)'}}></View>
{/*假的导航区域*/}
<View style = {styles.navi}>
{/*导航返回按钮*/}
<TouchableOpacity style={styles.backStyle} onPress={() => {
NoDoublePress.onPress(()=>{
this.onBackPress();
});
}}>
<Image style={{width:9/zoomW,height:16/zoomH}} source={backArrow} resizeMode="cover" />
</TouchableOpacity>
</View>
{/*话题信息*/}
<View style = {styles.info}>
{/*话题信息自定义UI*/}
<TopicInfoUtil id={parm_topicId}/>
</View>
</InfoBg>
{/*/!*使用话题的帖子列表*!/*/}
<HomeList arr_keyValue = {[{'topicId':parm_topicId}]} navigation={this.props.navigation}/>
{(this.state.infoLoading || this.state.listLoading) && (
<View style={styles.loadingBg}>
<View style={styles.loadingBox}>
<ActivityIndicator size="large" color="#fff" />
<Text
style={{ fontSize: 16, color: "#fff", marginTop: 6 / zoomH }}
>
加载中...
</Text>
</View>
</View>
)}
</View>
);
}
}
const styles = StyleSheet.create({
background:{
flex: 1,
backgroundColor: 'white',
display: 'flex',
},
loadingBg: {
position: "absolute",
top: 0,
width: "100%",
height: "100%",
display: "flex",
justifyContent: "center",
alignItems: "center"
},
loadingBox: {
width: 100 / zoomW,
height: 120 / zoomH,
backgroundColor: "rgba(0,0,0,.5)",
borderRadius: 8,
display: "flex",
alignItems: "center",
justifyContent: "center"
},
navi:{
display: 'flex',
alignItems: 'flex-start',
justifyContent:'flex-start',
flexDirection:'row',
width:'100%',
height:89/zoomH
},
backStyle:{
display: 'flex',
alignItems: 'flex-start',
justifyContent:'flex-start',
flexDirection:'row',
width:9/zoomW,
height:16/zoomH,
marginTop:34/zoomH,
marginLeft:15/zoomW
},
infoBg:{
height:195/zoomH,
width:'100%',
backgroundColor:'#000',
display: 'flex',
flexDirection:'column',
justifyContent:'flex-start',
alignItems:'flex-start'
},
info:{
backgroundColor:'rgba(0,0,0,0)',
display: 'flex',
flexDirection:'row',
justifyContent:'flex-start',
alignItems:'flex-start',
position:'absolute',
left:15/zoomW,
right:23/zoomW,
bottom:20/zoomH
},
});