React Native Touchable is disabling ScrollView - scrollview

I'm new to React Native, so am probably asking something very obvious, but please help.
I have a view wrapped in a touchable, so that the whole area responds to tapping. Then have a ScrollView nested inside the view. The overall structure is something like this:
<TouchableWithoutFeedback onPress={this.handlePress.bind(this)}>
<View>
<ScrollView>
<Text>Hello, here is a very long text that needs scrolling.</Text>
<ScrollView>
</View>
</TouchableWithoutFeedback>
When this compiles and runs, the tapping is detected, but the scroll view doesn't scroll at all. I made the above code short and simple, but each component has the proper styling and I can see everything rendering fine and the long text is cutoff at the bottom of the ScrollView. Please help.
Thank you!

This is what worked for me:
<TouchableWithoutFeedback onPress={...}>
<View>
<ScrollView>
<View onStartShouldSetResponder={() => true}>
// Scrollable content
</View>
</ScrollView>
</View>
</TouchableWithoutFeedback>
The onStartShouldSetResponder prop stops the touch event propagation towards the TouchableWithoutFeedback element.

I'm using this structure it's working for me:
<TouchableWithoutFeedback onPress={() => {}}>
{other content}
<View onStartShouldSetResponder={() => true}>
<ScrollView>
{scrollable content}
</ScrollView>
</View>
</TouchableWithoutFeedback>

You can have a scrollView or FlatList inside a TouchableWithoutFeedback. Tho you shouldn't but some times you have no other choice to go. Taking a good look at this questions and answer validates that.
close react native modal by clicking on overlay,
how to dismiss modal by tapping screen in react native.
For the Question, The only way you can make it work (atleast that i know of), or the simplest way is to add a TouchableOpacity around Text in your code like this,
<TouchableWithoutFeedback onPress={this.handlePress.bind(this)}>
<View>
<ScrollView>
<TouchableOpacity>
<Text>Hello, here is a very long text that needs scrolling.</Text>
</TouchableOpacity>
<ScrollView>
</View>
</TouchableWithoutFeedback>
Note: TouchableOpacity is a wrapper for making Views respond properly to touches so automatically you can style it the way you would have styled your View Component then set some of its special props to whatever you want e.g activeOpacity etc. Moreso you can use TouchableHighlight it works, but it receives one child element i.e you enclose all your component inside a parent one.

I'm using this structure it's working for me:
<TouchableOpacity>
{other content}
<ScrollView>
<TouchableOpacity activeOpacity={1}>
{scrollable content}
</TouchableOpacity>
</ScrollView>

I found that for my situation the other examples did not work as they disabled the ability to click or disabled the ability to scroll. I instead used:
<FlatList
data={[{key: text1 }, { key: text2 } ...]}
renderItem={({ item }) => (
<TouchableWithoutFeedback onPress={this.onPressContent}>
<Text style={styles.text}>{item.key}</Text>
</TouchableWithoutFeedback>
)}
/>
I happend to need to multiple chunks but you could use single element in the data array for one piece of text.
This let the press event to fire as well as let the text scroll.

Trying to use a ScrollView component inside a TouchableWithoutFeedback component can cause some unexpected behavior because the TouchableWithoutFeedback component is designed to capture user gestures and trigger an action, but the ScrollView component is designed to allow users to scroll through content.Here is what the official docs say
Do not use unless you have a very good reason. All elements that
respond to press should have a visual feedback when touched.
TouchableWithoutFeedback supports only one child. If you wish to have
several child components, wrap them in a View. Importantly,
TouchableWithoutFeedback works by cloning its child and applying
responder props to it. It is therefore required that any intermediary
components pass through those props to the underlying React Native
component.

Thats write , you cannot have a scroll view inside the TouchableWithoutFeedback, it the property of react native that it will disable it, you can instead have your scroll view outside the TouchableWithoutFeedback tab and add the other contents that you want upon the click inside a view tag.
You can also use the Touchable Highlights instead, if the TouchableWithoutFeedback does not works.

Related

How do I make an absolut positioned touchable element on top of a FlatList catch only press events and let other events propagate to the FlatList?

I have a FlatList in React Native with fullscreen image and video items (with pagingEnabled). I want to have a short descriptive touchable text floating on top of the FlatList, to open up a view with some information about the image/video when pressed.
To make the user experience nice, I'd like to be able to scroll the FlatList through the touchable text as well. I.e. if the user happen to start their scrolling motion on top of the text, the FlatList would scroll but if it is a simple press event I'd like to open the view with details about the image/video.
No mater what I try I end up with either the text being able to react to the press OR the FlatList being able to scroll. I have tried different configurations with a custom PanResponder and pointerEvents but seem to always end up with a state were one thing does not work. Do you guys have any smart ideas? I am probably just stuck in the wrong train of thought.
This is a simplified view of my component structure:
<View>
<View style={{ position: 'absolute', bottom: 100, zIndex: 10 }}>
<TouchableOpacity onPress={() => console.log('press')}>
<Text>Some Descriptive Text</Text>
</TouchableOpacity>
</View>
<FlatList pagingEnabled horizontal {...otherFlatListProps} />
</View>

Click TouchableOpacity while TextInput is focused

I'm currently working on a React Native App, where the user can type some text input and click "ok" to confirm. Next question appears. But at the moment i have to double click the button. First time the keyboard closes and second time the button is pressed. Same thing for iOS and android.
I already tried keyboardShoulPersitsTaps='always'and also handled, but nothing works.
I also tried to make every view above a scroll view and added this prop, but still no luck...
Can anyone help?
You are nesting a ScrollView with a KeyboardAwareScrollView.
You need to set the keyboardShouldPersistTaps prop on the parent view as well. Consider the following code snippet from your snack.
<KeyboardAwareScrollView keyboardShouldPersistTaps='handled'>
<SafeAreaView style={styles.container}>
<ScrollView ref={scrollViewRef} onContentSizeChange={() => scrollViewRef.current.scrollToEnd({ animated: true })} keyboardShouldPersistTaps='handled'>
{steps.map(item => { return (<SingleAlgorithmStep key={item["Question"]} step={item} stepsDone={steps} clickedButtons={clickedButtons} algorithmJson={currentAlgorithmJson} actualizeSteps={(item) => updateSteps(item)} actualizeButtons={(item) => updateClickedButton(item)} />) })}
</ScrollView>
</SafeAreaView>
</KeyboardAwareScrollView>
This fixed the issue on my device.
You are using the incorrect property name, keyboardShouldPersistTabs, instead of keyboardShouldPersistTaps.
<ScrollView
keyboardShouldPersistTaps="handled"
>
....
</ScrollView>

How to handle TextInput in scrollView nested in View react native

I have a code like this:
<View>
<View></View>
<ScrollView>
<View>
<TextInput/>
</View>
</ScrollView>
<View></View>
</View>
How can I handle it to response correctly to keyboard?
Both android and ios???
i have 2 permenant views top and bottom of the screen, this views pushed up on keyboard show
Your question is really unclear, but what I think you need is KeyboardAvoidingView.
It's a built-in React Native component that resizes based on the keyboard height.
To make sure the keyboard is not overlapping any important bits of your layout such as your text Input wrap your whole screen in KeyboardAvoidingView
https://facebook.github.io/react-native/docs/keyboardavoidingview
Solved!!
I solved it by handling the display of elements (views) on keyboard show and hide by keyboard in react native docs

How to define a click area on a button with react native?

I'm currently developing an app using react native and I'm using react-navigation to navigate between screens, using buttons in my header (back arrow for example).
It's working well, however even if my icon is the right size it seems like the click area is really narrow and I struggle with it.
Do you know how I could define a click zone on my button for it to be clicked easier? I've tried the hitslop prop but it's not working for me (maybe it's been deprecated?).
Here is my button:
var backArrow =
<TouchableOpacity onPress={() => this.props.navigation.goBack()}>
<Ionicons name="ios-arrow-back" size={22} color="#ff8c00" />
</TouchableOpacity>
I'm using Expo and testing on an iPhone 6s Plus.
Wrapping the Ionicons in a TouchableOpacity will only provide a clickable area as large as the Ionicons component. You can increase the size of the clickable area with the following structure:
<TouchableOpacity>
<View>
<Ionicons />
</View>
</TouchableOpacity>
by styling the View to be as large as you require it.

Pull To Refresh without FlatList

I have a View that renders dynamic cards from an API
<View>
<Card>1</Card>
<Card>2</Card>
<Card>3</Card>
</View>
Is there a way to do a pull-to-refresh on this view?
Make a call to the server and refresh this view without a FlatList component?
React-Native's RefreshControl can only be applied to a ScrollView. (Note that a FlatList is actually a ScrollView).
So wrap your <Card />'s in a <ScrollView> rather than a <View> and you can apply the RefreshControl to it as seen in the docs.
Here is an example Snack for you: https://snack.expo.io/Hk606OYKM