[Flutter] Future / async 예제 메모2

 

Future<String> fu() {
  
  return Future.delayed(Duration(seconds: 2), () {
    
    print('SUCCESS');
    return 'STR';
  });  
}

Future<String> hi() async {
  
  
  fu().then((e) {print(e);});
  
  return 'CLEAR';
}


void runFunc() async {
  
  
  final f = await hi();
  print(f);
  print('WAIT');
  
}

void main() {
  
  runFunc();
}

 

 

CLEAR

WAIT

 

2초후

 

SUCCESS

STR

 

 

then은 안기다림.