inputData에 text 정보를 저장하고,
if (inputData != ' '){
내가만든함수};
이런식의 이프문을 만들었는데,
왜 inputData가 빈 텍스트일때도 함수가 실행될까요??
import 'package:flutter/material.dart';
void main(){
runApp(
MaterialApp(
home: MyApp()
)
);
}
class MyApp extends StatefulWidget {
MyApp({Key? key}) : super(key: key);
@override
State<MyApp> createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
var total = 3;
var name = ['김영숙', '호날두', '피자집'];
addOne(){
setState(() {
total++;
});
}
addname(a){
setState(() {
name.add(a);
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
floatingActionButton: FloatingActionButton(
onPressed: () {
showDialog(
context: context,
builder: (context) {
return DialogUI(addone: addOne, addname: addname,
);
}
);
}
),
appBar: AppBar(title: Text(total.toString())),
body: ListView.builder(
itemCount: name.length,
itemBuilder: (c,i){
return ListTile(
leading: Icon(Icons.account_box),
title: Text(name[i])
);
}
),
);
}
}
class DialogUI extends StatelessWidget {
DialogUI({Key?key, this.addone, this.addname}): super(key:key);
final addone;
final addname;
var inputData=TextEditingController();
@override
Widget build(BuildContext context) {
return Dialog(
child: Column(
children: [
TextField(controller: inputData),
TextButton(child: Text('완료'), onPressed:(){
if (inputData!=''){
addone();
addname(inputData.text);
};
}),
TextButton(
child: Text('취소'),
onPressed:(){Navigator.pop(context);}
)
],
)
);
}
}
전체코드입니다..
