英文:
How to hide or show an icon in a row in Flutter
问题
我有一行包括3个图标，但其中一个需要在有笔记时显示，没有笔记时隐藏。
我尝试使用Visibility，但无法做对。如果没有笔记，我需要使用SizedBox()，以便其他内容保持正确对齐。
应该如何正确做这个？
Expanded(
flex: 14,
child: Center(
child: GestureDetector(
onTap: () {
print(data[index].rosterId);
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => ShiftsForRoster(
rId: data[index].rosterId,
),
),
);
},
child: Icon(Icons.note_alt_outlined, size: 35, color: kMainColor80),
),
),
),
英文:
I have a row which includes 3 icons, but one of them needs to be shown if notes have been added, but hidden if there are no notes.
I tried to use Visibility but couldn't get it right. If there are no notes, I need to use a SizedBox() so everything else stays aligned correctly.
What's the right way to do this?
Expanded(
flex: 14,
child: Center(
child: GestureDetector(
onTap: () {
print(data[index].rosterId);
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => ShiftsForRoster(
rId: data[index].rosterId,
),
),
);
},
child: Icon(Icons.note_alt_outlined, size: 35, color: kMainColor80),
),
),
),
答案1
得分: 0
我看不出你的代码片段中如何检查是否存在便笺。我使用了一个名为 "notesExist" 的布尔值来检查它是否为真，如果是真的就显示图标，否则显示一个空的容器。你也可以像这样做：notes.length != 0
Expanded(
flex: 14,
child: notesExist ? Center(
child: GestureDetector(
onTap: () {
print(data[index].rosterId);
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => ShiftsForRoster(
rId: data[index].rosterId,
),
),
);
},
child: Icon(Icons.note_alt_outlined, size: 35, color: kMainColor80),
),
) : Container()
),
英文:
I can't see in your code snippet, how you check if you have notes or not. I used a bool "notestExist", check if it's true and show your icon, else show an empty Container. You could also do something like notes.length != 0
Expanded(
flex: 14,
child: notesExist ? Center(
child: GestureDetector(
onTap: () {
print(data[index].rosterId);
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => ShiftsForRoster(
rId: data[index].rosterId,
),
),
);
},
child: Icon(Icons.note_alt_outlined, size: 35, color: kMainColor80),
),
) : Contaniner()
),
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