React Native Components & API
TouchableOpacity, TextInput, Modal, ActivityIndicator, Platform, Dimensions, StatusBar
1Which component should be used to create a simple button with a transparency effect on touch?
Which component should be used to create a simple button with a transparency effect on touch?
Resposta
TouchableOpacity is the standard component for creating buttons with a visual transparency effect on touch. When the user presses it, the content opacity temporarily decreases, providing immediate visual feedback. It's the most commonly used component for simple touch interactions in React Native.
2Which TextInput prop allows hiding the entered text, useful for password fields?
Which TextInput prop allows hiding the entered text, useful for password fields?
Resposta
The secureTextEntry prop hides the entered text by displaying dots or asterisks instead of characters. This is the standard method for creating secure password fields in React Native. When enabled, text is not visible on screen and clipboard is typically disabled for security reasons.
3How to retrieve the value entered in a TextInput in a controlled manner?
How to retrieve the value entered in a TextInput in a controlled manner?
Resposta
A controlled TextInput combines the value prop with the onChangeText callback. The value prop defines the displayed text and is linked to a React state. onChangeText is called on each modification with the new value, allowing state updates. This pattern ensures a single source of truth and enables real-time text validation or transformation.
What is the main difference between TouchableOpacity and Pressable?
How to display a loading indicator centered on the screen?
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