Passing data through onPress doesn't allow to pass parameter in a function properly

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I'm trying to pass data to a specific page in react native. Whenever i press a button to go to that page, the function which is supposed to be called on that specific page on specific event is called earlier when i'm pressing the button.

add=(ss)=> {
     const textInput = this.state.textInput.concat(TextInput)
     this.setState({ textInput })

    console.log(ss)
  }
  render() {
    return (
      <Container>
        <Content>
        <List>
            <ListItem>
              <Left>
                <Text style={styles.firstText}>Address : <Text>{this.state.address}</Text></Text>
              </Left>
              <Right>
                <Icon name="create" onPress={this.add('dssda')}></Icon>
              </Right>
            </ListItem></List>

Bind the function properly, you should write it like below:

onPress ={() => this.add('dssda')}

If you would not wanting to pass parameters and you would have written onPress={this.add} then the function would have properly called on the onPress event only as it is properly binded there with same number of params as that from the callback of onPress i.e. no parameters.

Passing data through onPress doesn't allow to pass - html, Passing data through onPress doesn't allow to pass parameter in a function properly - react-native. After creating the post, you want to pass the data for the post back to previous screen. To achieve this, you can use the navigate method, which acts like goBack if the screen already exists. You can pass the params with navigate to pass the data back:

On Press should be binded,

onPress ={() => this.add(data)}

Which is passed to ss variable in your method,

add=(ss)=> {
     const textInput = this.state.textInput.concat(TextInput)
     this.setState({ textInput })

    console.log(ss)
  }

Hope this works fine. Thank you!

Passing parameters to routes, Pass params to a route by putting them in an object as a second parameter to the navigation.navigate function: this.props.navigation.navigate('RouteName', { /*  React Native Passing Value between Screen. While creating an app containing multiple screens, then sometimes it is required to pass value between one screen to another. This can be achieved by using this.props.navigation.navigate() function. This function is used to navigate between the different screens.

Remember to bind your function. You can bind event in constructor of Class Component like this:

 constructor(props) {
    super(props);
    this.state = {
    };
    this.add = this.add.bind(this);
}

Learn Corona SDK Game Development, the text by some amount (xOffset and yOffset), change the font to use for the text can go through (onPress and onRelease would always occur but onDrag may not). then check the phase attribute of an event object passed in to differentiate the Here, though, the phases doesn't actually matter, so there's no check for it,​  < Button onPress = {() => {alert ('You tapped the button!');}} title = " Press Me " /> This will render a blue label on iOS, and a blue rounded rectangle with light text on Android. Pressing the button will call the "onPress" function, which in this case displays an alert popup. If you like, you can specify a "color" prop to change the color of

Getting Started with React Native, This is to make sure that the Delete button doesn't show up for new notes. The Create Note onPress handler has been updated to set isSaved = false in the empty note that we pass to the NoteScreen, when that button is pressed. Now, let's look at the onPress handler for the Delete button: onPress={ and Saving Data. In the previous section, ["Hello React Navigation"](hello-react-navigation.md), we defined a stack navigator with two routes (`Home` and `Details`), but we didn't learn how to let a user navigate from `Home` to `Details` (although we did learn how to change the _initial_ route in our code, but forcing our users to clone our repository and change the route in our code in order to see another

Pass a Parameter Through onClick in React, A common thing you will want to learn in React is how to pass a value as a parameter through the onClick event handler. function inside of the onClick handler which allows us to pass in values as a parameter in React. I use the following code to create an initial screen that does not have a NavBar but pushes on a stack that contains a floating NavBar. When navigating to the second stack, params are being passed.

Mobile Application Development: JavaScript Frameworks, This is to make sure that the Delete button doesn't show up for new notes. The Create Note onPress handler has been updated to set isSaved = false in the empty note that we pass to the NoteScreen, when that button is pressed. seen navigator.pop() before, but we're also invoking a new [396 ] Displaying and Saving Data. Passing Data when Navigating. Sometimes it's necessary for a page to pass data to another page during navigation. Two techniques for accomplishing this are by passing data through a page constructor, and by setting the new page's BindingContext to the data. Each will now be discussed in turn. Passing Data through a Page Constructor

Comments
  • I think you have provided incomplete code..also try onPress={() => this.add('dssda')}