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Скачать или смотреть Fixing Date Selection Issues in react-native-calendar-picker

  • vlogize
  • 2025-09-05
  • 2
Fixing Date Selection Issues in react-native-calendar-picker
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Описание к видео Fixing Date Selection Issues in react-native-calendar-picker

Learn how to resolve issues with date selection in the `react-native-calendar-picker` by adjusting the initial state settings.
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This video is based on the question https://stackoverflow.com/q/63130389/ asked by the user 'Deagle50' ( https://stackoverflow.com/u/12839714/ ) and on the answer https://stackoverflow.com/a/63132198/ provided by the user 'Deagle50' ( https://stackoverflow.com/u/12839714/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Calendar Picker doesn't let pick a date (if calling setState or parent functions)

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
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Fixing Date Selection Issues in react-native-calendar-picker

When working with date pickers in React Native, particularly the react-native-calendar-picker component, developers may encounter frustrating issues with date selection while using the modal. This often stems from state management pitfalls that can block the expected functionality. Specifically, one common problem is that the picker allows selection when merely logging the date, but fails to display the selection visually when state updating functions like setState or props.changeDate are invoked. In this guide, we will explore the root cause of this issue and walk through the solution step-by-step.

Understanding the Problem

The problem arises when integrating the Calendar Picker within a modal. The setup involves multiple components and state management. For instance, the Calendar Picker successfully logs the newly selected date but doesn't update the component's visual state as expected. When attempting to change the selected date, you may observe that commenting out the state change allows the selection to work, while uncommenting it does not.

Here’s a brief recap of the setup:

A modal containing the Calendar Picker.

An onDateChange function that updates the state when a new date is selected.

A parent component that handles the date change further up the tree.

Code Snippet Recap

Key parts include the modal's constructor, the Calendar Picker configuration, the onDateChange function, and the parent's date change method.

The Solution

After some debugging of the code, it was identified that the initial property for selectedStartDate was causing the issue. This property was set to moment()—which defaults to the current date—leading to conflicts when attempting to update the selection.

Steps to Fix the Issue

Locate the selectedStartDate Prop:
In your Calendar Picker setup, you will find a line that resembles this:

[[See Video to Reveal this Text or Code Snippet]]

Remove or Comment Out This Prop:
To allow the date picker to operate correctly, remove or comment out this line. By doing so, you eliminate the initial state conflict with moment().

Validate Functionality:
After making the change, test the Calendar Picker again. You should now notice that selecting a date works as intended, updating both the visual state and the backend state correctly.

Evaluate Other Dependencies:
Ensure that any additional props or parent functions related to the date selection are still functioning correctly. The change made should improve responsiveness without breaking other parts of your component.

Conclusion

In conclusion, the issue with the react-native-calendar-picker not updating visually during state changes is often related to improper initialization of the selectedStartDate property. By adjusting this setup, developers can ensure that their calendar pickers work seamlessly and enhance the user experience. Remember, careful management of component states is essential in building smooth and effective React Native applications.

If you run into similar issues, it’s always a good practice to review how you initialize your components and manage your states. Happy coding!

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