Question 184823 in Flutter Question posted in
The official Flutter documentation can be found here.

Flutter conditional time statement

I want to show up greeting text something like (Goodmorning, Good afternoon, Good evening) in a text widget between the times of 6 hours intervals in flutter

I’ve been trying to come out with how to…but still nothing so far. If someone can help me out with a code of such. Thanks

Tags:

2

Answers


  1. 0

    You may use the DateTime.now() function to get the current time from user and depending on the value of that time you can update your greeting message by calling set state or using the corresponding method for your state management. You can apply if else conditions on the value obtained from DateTime.now() function.
    Here’s some example code that can help you.

    void updateGreeting() {
setState(() {
  // Get the current system time
  DateTime now = DateTime.now();
  // Determine the appropriate greeting based on the time of day
  if (now.hour >= 6 && now.hour < 12) {
    greeting = 'Good morning';
  } else if (now.hour >= 12 && now.hour < 18) {
    greeting = 'Good afternoon';
  } else {
    greeting = 'Good evening';
  }
});

// Update the greeting every minute
Timer(Duration(minutes: 1), updateGreeting);
}
    Login or Signup to reply.
  2. 0

    To add onto Naqeeb’s answer, the latest version of Flutter ships with Dart 3 which comes with switch expressions. That means the chained if-then blocks:

    DateTime now = DateTime.now();
if (now.hour >= 6 && now.hour < 12) {
  greeting = 'Good morning';
} else if (now.hour >= 12 && now.hour < 18) {
  greeting = 'Good afternoon';
} else {
  greeting = 'Good evening';
}

    can be replaced with a pattern-powered switch block:

    DateTime now = DateTime.now();
switch(now.hour) {
  case >= 6 && < 12    : greeting = 'Good morning';
  case >= 12 && < 18   : greeting = 'Good afternoon';
  default              : greeting = 'Good evening';
}

    or better yet, a switch expression:

    DateTime now = DateTime.now();
greeting = switch(now.hour) {
  >= 6 && < 12     => 'Good morning',
  >= 12 && < 18    => 'Good afternoon',
  _                => 'Good evening',
};
    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search