I made a screen of a flatlist that displays a bunch of Doctors infos(name,location,Picture),when i click on a doctor view it navigates to his profil. for the moment the profil screen is just blank, but i want to pass the params so i can just display them without re doing the api call.
here is the code of the research screen where the flatlist is:
render(){
return (
<View style={styles.main_container}>
<FlatList
data={this.state.dataSource}
keyExtractor={item=> item.id.toString()}
renderItem= {({item})=> <MedItem Med={item} />} />
</View>
);
}
i created a component custom med item to style my flat list:
//Meditem.js
class MedItem extends React.Component {
render(){
const Med = this.props.Med
return (
<View style={styles.main_container} >
<View style={styles.ctr1}>
<TouchableOpacity onPress={()=>NavigationService.navigate('MedProfil')}>
<Image style={styles.img} source={require('../assets/Title.jpg')} />
</TouchableOpacity>
<TouchableOpacity onPress={()=>NavigationService.navigate('MedProfil')}>
<Text style={styles.txt}> {Med.name} </Text>
<Text style={{flexWrap:'wrap'}} > {Med.specialite} </Text>
<Text> {Med.work} </Text>
</TouchableOpacity>
</View>
<View style={styles.ctr2}>
<Text style={{textAlign:'center',marginBottom:5}}>Disponibilité</Text>
<Calendar/>
</View>
</View>
);
}
}
last this is my doctor profil screen:
export default class MedProfilScreen extends React.Component {
render(){
return(
<View>
<Text>{Med.name}</Text>
<Button title='Prendre rendez-vous' onPress={()=>{}} />
</View>
);
}
}
Can someone please help me doing this.
thank you
Send Data through navigation like this
this.props.navigation.navigate("MedProfil",
{
name:Med.name
})
Get data in MedProfil Screen
const name=this.props.navigation.getParam("name")
In your Sending component use this:
constructor(props) {
super(props);
this.navigate = this.props.navigation.navigate;
}
//Send it like this
this.navigate("MedProfilScreen", { name:Med.name });
In your receiving component
constructor(props) {
super(props);
this.params = this.props.navigation.state.params;
}
//Can access it using
console.log(this.params.name);
thank you everyone! getParam won't work for me.
i used this to solve the problem
//MedItem.js
<TouchableOpacity onPress={()=>NavigationService.navigate('MedProfil',Med)}>
and in the profil screen
//MedProfil.js
export default function MedProfilScreen({route}){
const {name,specialite,work}=route.params;
return(
<ScrollView contentContainerStyle={{flex:1,alignItems:'center'}}>
<View style={styles.ctr1}>
<Text>{name}</Text>
<Text>{specialite}</Text>
<Text>{work}</Text>
I want to create a Modal component and I want to have possibility to inject to it everything what I want. Firstly I decided to use HOC but then I've changed my solution to render props. Everything works fine but I don't really like this solution. I'm wondering how could I optimize it to make it better. What is the best practise to create such kind of modal where you have button opening this modal beyond modal component. I really don't like that now I have two components with open/close state of modal. And both of them have a toggle method to open/close modal. Any suggestion? Maybe I should stick with the HOC ?
Here's the code with Component.js where CustomModal is used:
toggleModalVisibility = (visible) => {
this.setState({modalVisible: visible});
};
render() {
const question = this.props.questions[this.props.counter];
return (
<View style={styles.questionContainer}>
<CustomModal
visible={this.state.modalVisible}
toggleModalVisibility={this.toggleModalVisibility}
render={() => (
<>
<Text>{question.text}</Text>
<Text>{question.details}</Text>
</>
)}
/>
<View style={styles.questionTextContainer}>
<Text style={styles.questionText}>{question.text}</Text>
<TouchableOpacity onPress={() => this.toggleModalVisibility(!this.state.modalVisible) }>
<FontAwesome5 name='question-circle' size={30} color='#B7DBF3' light />
</TouchableOpacity>
</View>
</View>
)
}
and here's the code of CustomModal.js
export default class CustomModal extends Component {
constructor(props) {
super(props);
this.state = {
isOpen: this.props.visible
};
}
componentDidUpdate(prevProps) {
if (prevProps.visible !== this.props.visible) {
this.setState({isOpen: this.props.visible});
}
}
toggle = (isOpen) => {
this.setState({ isOpen });
this.props.toggleModalVisibility(isOpen)
}
render() {
return (
<View>
<Modal
animationType='slide'
transparent={false}
visible={this.state.isOpen}
>
<View style={{marginTop: 30, marginLeft: 5}}>
<TouchableHighlight
onPress={() => {
this.toggle(!this.state.isOpen)
}}>
<FontAwesome5 name='times-circle' size={30} light />
</TouchableHighlight>
<View>{this.props.render()}</View>
</View>
</Modal>
</View>
)
}
}
Whenever I tried to build UI from scratch I'm getting this error adjacent jsx element must be wrapped in an enclosing tag. I don't know how to solve this. Because I tried different methods, I've tried to put the blocks within View component withflex:1 but non-use. Is there any proper solution for this. This is becoming a great challenge for me because I can't design any components of my own. What to do please help me. Following is my code.
screen.js
export default class FirstScreen extends Component {
constructor(props){
super(props);
this.state = {
showPopupDialog: false,
workType: "",
workers: []
}
}
componentWillMount(){
fetch('http://192.168.1.6:3000/api/worker', {
method:'GET',
headers:{
Accept: 'application/json'
}
})
.then(response => response.json())
.then(responseData =>
this.setState({
workers:responseData
})
)
}
onPressYes = (workType) => {
console.log(workType);
}
popupDialog = (id, workType) => {
this.setState ({
showPopupDialog: true,
workType: workType
});
//make sure you set showPopupDialog to false and workType to "" when you click yes or no button in PopupDialog component so that it will work the next time you click on card
}
render() {
const { workers, workType, showPopupDialog} = this.state;
return (
<View style={{flex:1}}>
<Header />
<ScrollView>
{workers.map((a, index)=> (
<View style={{flex:1}}>
<CardSection>
<TouchableOpacity onPress={() => this.popupDialog(a.id, a.work_type)}>
<View style={{ maringTop: 10, marginLeft:120}}>
<Image style={{ height: 100, width: 100 }} source={{ uri: a.work_type == 'Carpenter' ? images[0].image : images[1].image}}/>
<Text style={{marginLeft:20, fontSize:20}}>{a.work_type}</Text>
</View>
</TouchableOpacity>
</CardSection>
</View>
))}
{showPopupDialog && <PopupDialog
dialogStyle={{ backgroundColor: "#FFFFFF", height: 180, width:300, borderWidth:1,padding:10}}
overlayBackgroundColor="#fff" dismissOnTouchOutside={true}>
<View style={styles.dialogContentView}>
<Text style={{fontSize:18, margingTop:10,color:"#000000"}}>Are you sure you want to submit?</Text>
<View style={{flexDirection:'row'}}>
<View style={styles.button_1}>
<Button title="Yes" color="#FF6633" onPress={() => this.onPressYes(workType)}/>
</View>
<View style={styles.button_1}>
<Button title="No" color="#FF6633" onPress={() =>this._onPressNo() }/>
</View>
</View>
</View>
</PopupDialog>}
</ScrollView>
</View>
);
}
}
The issue I'm facing is I can't place the <PopupDialog> component adjacent to <CardSection> , in order to that I put the <PopupDialog> within <View> ,even though it doesn't solve my issue.Please help..Please
Give a try with below corrected code.
There are two things that needs be corrected
You are doing .map but you are not returning anything which I have
corrected in the code below
export default class FirstScreen extends Component {
constructor(props){
super(props);
this.state = {
workType: "",
workers: []
}
}
componentWillMount(){
fetch('http://192.168.1.6:3000/api/worker', {
method:'GET',
headers:{
Accept: 'application/json'
}
})
.then(response => response.json())
.then(responseData =>
this.setState({
workers:responseData
})
)
}
onPressYes = (workType) => {
console.log(workType);
}
popUpDialog = (id, workType) => {
this.setState ({
workType: workType
});
this.popupDialog.show();
//make sure you set workType to "" when you click yes or no button in PopupDialog component so that it will work the next time you click on card
}
render() {
const { workers, workType} = this.state;
return (
<View style={{flex:1}}>
<Header />
<ScrollView>
{workers.map((a, index)=> (
<View style={{flex:1}}>
<CardSection>
<TouchableOpacity onPress={() => this.popUpDialog(a.id, a.work_type)}>
<View style={{ maringTop: 10, marginLeft:120}}>
<Image style={{ height: 100, width: 100 }} source={{ uri: a.work_type == 'Carpenter' ? images[0].image : images[1].image}}/>
<Text style={{marginLeft:20, fontSize:20}}>{a.work_type}</Text>
</View>
</TouchableOpacity>
</CardSection>
</View>
))}
<PopupDialog ref={popupDialog => {
this.popupDialog = popupDialog;
}}
dialogStyle={{ backgroundColor: "#FFFFFF", height: 180, width:300, borderWidth:1,padding:10}}
overlayBackgroundColor="#fff" dismissOnTouchOutside={true}>
<View style={styles.dialogContentView}>
<Text style={{fontSize:18, margingTop:10,color:"#000000"}}>Are you sure you want to submit?</Text>
<View style={{flexDirection:'row'}}>
<View style={styles.button_1}>
<Button title="Yes" color="#FF6633" onPress={() => this.onPressYes(workType)}/>
</View>
<View style={styles.button_1}>
<Button title="No" color="#FF6633" onPress={() =>this._onPressNo() }/>
</View>
</View>
</View>
</PopupDialog>
</ScrollView>
</View>
);
}
}
If I understand your question correctly...
You can return multiple root elements in jsx by wrapping is in a <React.Fragment> element (you can use <> and </> in v16.2 and later). Fragments are new in React v16. Prior to that, you just have to wrap them in some element (a div or span, usually).
The problem is that you have this structure:
<a>
{this.state.workers.map((a, index)=>
<b/>
<c/>
)}
</a>
Since <b/><c/> is parsed separately and there's no enclosing element, you're getting the error. But an enclosing element isn't necessary for the final structure, which does have an enclosing element. The solution is to simply return an array of JSX elements, like this:
<a>
{this.state.workers.map((a, index)=>
[<b/>,
<c/>]
)}
</a>
I'm trying to create IndicatorViewPager with three parts.
the problem that I can't see the content of each page. Below my code.
export default class Reservations extends Component {
render() {
return (
<View style={{flex:1}}>
<IndicatorViewPager
style={{flex:1, paddingTop:20, backgroundColor:'white'}}
indicator={this._renderTitleIndicator()}
>
<View style={{backgroundColor:'cadetblue'}}>
<Text>page one</Text>
</View>
<View style={{backgroundColor:'cornflowerblue'}}>
<Text>page two</Text>
</View>
<View style={{backgroundColor:'#1AA094'}}>
<Text>page three</Text>
</View>
</IndicatorViewPager>
</View>
);
}
_renderTitleIndicator() {
return <PagerTitleIndicator titles={['one', 'two', 'three']} />;
}
I have the title for each part but the content is hidden. Thank you for your help.
Is there anyway to redirect user to a different component (also passing arguments with it) without calling render function?
almost in all tutorials i found, they use sameway :
render() {
return (
<NavigatorIOS
style={styles.container}
initialRoute=\{\{
title: 'first',
component: First
}} />
);
}
Now see my code :
in renderRow , for touchablehighlights , i need to be able to redirect user to a page with an argument, (in this case i need to send user to component CourseDetail with argument of course_id, so i can show user course's details)
class Courses extends Component {
constructor(props) {
super(props);
this.state = {
dataSource: new ListView.DataSource({
rowHasChanged: (row1, row2) => row1 !== row2,
}),
loaded: false,
};
}
fetchData() {
// fetching data here
}
componentDidMount() {
this.fetchData();
}
render(){
if (!this.state.loaded) {
return this.renderLoadingView();
}
return (
<View style={{
flex: 1
}}>
<ListView
dataSource={this.state.dataSource}
renderRow={this.renderRow}
style={styles.listView}
/>
</View>
);
}
renderRow(data) {
var header = (
<View>
<View style={styles.rowContainer}>
<View style={styles.textContainer}>
<Text style={styles.title}>{data.nid}</Text>
<Text style={styles.description} numberOfLines={0}>{data.title}</Text>
</View>
</View>
<View style={styles.separator}></View>
</View>
);
///////////
var cid = [];
var content = [];
for(let x=0; x < Object.keys(data.course).length; x++){
cid[x] = data.course[x].course_id;
content.push(
<TouchableHighlight
underlayColor='#e3e0d7'
key={x}
onPress={()=>{console.log(cid[x]);}} //// i need to navigate user to a page with passing arguments (course_id in this case)
style={styles.child}
>
<Text style={styles.child}>
{data.course[x].title}
</Text>
</TouchableHighlight>
);
}
console.log(cid);
var clist = (
<View style={styles.rowContainer}>
{content}
</View>
);
////////////
return (
<Accordion
header={header}
content={clist}
easing="easeOutCubic"
/>
);
}
renderLoadingView() {
return (
<View style={styles.loading}>
<Text style={styles.loading}>
Loading Courses, please wait...
</Text>
</View>
);
}
}
module.exports = Courses;
Thanks in Advance!
By help of this Question here :
React-Native: Cannot access state values or any methods declared from renderRow
I was able to solve the issue by changing :
<ListView
dataSource={this.state.dataSource}
renderRow={this.renderRow}
style={styles.listView}
/>
To :
<ListView
dataSource={this.state.dataSource}
renderRow={this.renderRow.bind(this)}
style={styles.listView}
/>
Hope it will help others who may have the same problem.