打字时标签文本显示在错误的位置
label text is displaying at wrong place when typing
如下图所示,第一张图片在我点击它之前显示了我的文本字段。第二张图片显示了开始输入并单击后的显示方式。我想在打字时删除标签文本显示。我该怎么做?
TextFormField(
controller: usernameEditingController,
decoration: InputDecoration(
fillColor: textWhite,
filled: true,
enabledBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(20.0),
borderSide: const BorderSide(
color: textdarkBlue,
),
),
focusedBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(20.0),
borderSide: const BorderSide(
color: textdarkBlue,
),
),
errorBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(20.0),
borderSide: const BorderSide(color: Colors.red),
),
focusedErrorBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(20.0),
borderSide: const BorderSide(color: Colors.red),
),
isDense: true,
contentPadding: EdgeInsets.fromLTRB(10, 30, 10, 0),
labelText: "User Name",
labelStyle: TextStyle(
fontSize: 15,
color: textdarkBlue,
),
hintText: "ex: James",
hintStyle: TextStyle(
color: textdarkBlue,
fontFamily: "Paralucent",
fontSize: 14)),
style: TextStyle(
color: textdarkBlue,
),
validator: (text) {
if (text!.isEmpty) {
return "Username can't be empty";
} else {
return null;
}
},
onChanged: (String? text) {
userName = text!;
//print(userName);
},
),
这是 labelText
属性 的行为,如果您不需要它,只需将其删除并改用 hintText
TextFormField(
controller: usernameEditingController,
decoration: InputDecoration(
fillColor: textWhite,
filled: true,
enabledBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(20.0),
borderSide: const BorderSide(
color: textdarkBlue,
),
),
focusedBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(20.0),
borderSide: const BorderSide(
color: textdarkBlue,
),
),
errorBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(20.0),
borderSide: const BorderSide(color: Colors.red),
),
focusedErrorBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(20.0),
borderSide: const BorderSide(color: Colors.red),
),
isDense: true,
contentPadding: EdgeInsets.fromLTRB(10, 30, 10, 0),
hintText: "ex: James",
hintStyle: TextStyle(
color: textdarkBlue,
fontFamily: "Paralucent",
fontSize: 14)),
style: TextStyle(
color: textdarkBlue,
),
validator: (text) {
if (text!.isEmpty) {
return "Username can't be empty";
} else {
return null;
}
},
onChanged: (String? text) {
userName = text!;
//print(userName);
},
),
显示为OutlineInputBorder
的行为。
有几种不同的方法,一种是使用 FocusNode
,目标是提供 labelText:null
焦点变化。
String userName = "";
late FocusNode focusNode = FocusNode()
..addListener(() {
setState(() {});
});
.....
TextFormField(
// controller: usernameEditingController,
focusNode: focusNode,
decoration: InputDecoration(
labelText: focusNode.hasFocus ? null : "User Name",
如下图所示,第一张图片在我点击它之前显示了我的文本字段。第二张图片显示了开始输入并单击后的显示方式。我想在打字时删除标签文本显示。我该怎么做?
TextFormField(
controller: usernameEditingController,
decoration: InputDecoration(
fillColor: textWhite,
filled: true,
enabledBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(20.0),
borderSide: const BorderSide(
color: textdarkBlue,
),
),
focusedBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(20.0),
borderSide: const BorderSide(
color: textdarkBlue,
),
),
errorBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(20.0),
borderSide: const BorderSide(color: Colors.red),
),
focusedErrorBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(20.0),
borderSide: const BorderSide(color: Colors.red),
),
isDense: true,
contentPadding: EdgeInsets.fromLTRB(10, 30, 10, 0),
labelText: "User Name",
labelStyle: TextStyle(
fontSize: 15,
color: textdarkBlue,
),
hintText: "ex: James",
hintStyle: TextStyle(
color: textdarkBlue,
fontFamily: "Paralucent",
fontSize: 14)),
style: TextStyle(
color: textdarkBlue,
),
validator: (text) {
if (text!.isEmpty) {
return "Username can't be empty";
} else {
return null;
}
},
onChanged: (String? text) {
userName = text!;
//print(userName);
},
),
这是 labelText
属性 的行为,如果您不需要它,只需将其删除并改用 hintText
TextFormField(
controller: usernameEditingController,
decoration: InputDecoration(
fillColor: textWhite,
filled: true,
enabledBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(20.0),
borderSide: const BorderSide(
color: textdarkBlue,
),
),
focusedBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(20.0),
borderSide: const BorderSide(
color: textdarkBlue,
),
),
errorBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(20.0),
borderSide: const BorderSide(color: Colors.red),
),
focusedErrorBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(20.0),
borderSide: const BorderSide(color: Colors.red),
),
isDense: true,
contentPadding: EdgeInsets.fromLTRB(10, 30, 10, 0),
hintText: "ex: James",
hintStyle: TextStyle(
color: textdarkBlue,
fontFamily: "Paralucent",
fontSize: 14)),
style: TextStyle(
color: textdarkBlue,
),
validator: (text) {
if (text!.isEmpty) {
return "Username can't be empty";
} else {
return null;
}
},
onChanged: (String? text) {
userName = text!;
//print(userName);
},
),
显示为OutlineInputBorder
的行为。
有几种不同的方法,一种是使用 FocusNode
,目标是提供 labelText:null
焦点变化。
String userName = "";
late FocusNode focusNode = FocusNode()
..addListener(() {
setState(() {});
});
.....
TextFormField(
// controller: usernameEditingController,
focusNode: focusNode,
decoration: InputDecoration(
labelText: focusNode.hasFocus ? null : "User Name",