我正在尝试在 flutter 中使用进度状态按钮。从 pub.dev 文档来看,小部件应设置如下
Widget buildTextWithIcon() {
return ProgressButton.icon(iconedButtons: {
ButtonState.idle: IconedButton(
text: "Send",
icon: Icon(Icons.send, color: Colors.white),
color: Colors.deepPurple.shade500),
ButtonState.loading:
IconedButton(text: "Loading", color: Colors.deepPurple.shade700),
ButtonState.fail: IconedButton(
text: "Failed",
icon: Icon(Icons.cancel, color: Colors.white),
color: Colors.red.shade300),
ButtonState.success: IconedButton(
text: "Success",
icon: Icon(
Icons.check_circle,
color: Colors.white,
),
color: Colors.green.shade400)
}, onPressed: onPressedIconWithText, state: stateTextWithIcon);
}
我有一个函数(已经编写并且工作正常),我想在单击按钮时运行该函数,将按钮状态更改为 ButtonState.loading,然后更改为 ButtonState.success,然后返回 ButtonState.idle。请参阅下面 pub.dev 网站上所述的函数。
void onPressedIconWithText() {
switch (stateTextWithIcon) {
case ButtonState.idle:
stateTextWithIcon = ButtonState.loading;
Future.delayed(Duration(seconds: 1), () {
setState(() {
stateTextWithIcon = Random.secure().nextBool()
? ButtonState.success
: ButtonState.fail;
});
});
break;
case ButtonState.loading:
break;
case ButtonState.success:
stateTextWithIcon = ButtonState.idle;
break;
case ButtonState.fail:
stateTextWithIcon = ButtonState.idle;
break;
}
setState(() {
stateTextWithIcon = stateTextWithIcon;
});
} }
但是,我是编码新手,完全不知道如何使用“中断”或更改按钮状态。任何人都可以帮助建议我如何插入我的函数(假设它只是 void runFunction() 到上面的代码中,改变状态从空闲 --> 加载 (onPressed) --> 成功 --. 空闲。
任何帮助将不胜感激
最佳答案
您可以使用 setState 更新 stateTextWithIcon 的值
ButtonState stateTextWithIcon = ButtonState.idle;
Widget buildTextWithIcon() {
return ProgressButton.icon(iconedButtons: {
ButtonState.idle: IconedButton(
text: "Send",
icon: Icon(Icons.send, color: Colors.white),
color: Colors.deepPurple.shade500),
ButtonState.loading:
IconedButton(text: "Loading", color: Colors.deepPurple.shade700),
ButtonState.fail: IconedButton(
text: "Failed",
icon: Icon(Icons.cancel, color: Colors.white),
color: Colors.red.shade300),
ButtonState.success: IconedButton(
text: "Success",
icon: Icon(
Icons.check_circle,
color: Colors.white,
),
color: Colors.green.shade400)
}, onPressed: (){
progressButton()
},
state: stateTextWithIcon,
);
这是我的 onPressed 处理的功能
Future progressButton() async {
setState(() {
//sets the state of stateTextWithIcon to loading once button is pressed
stateTextWithIcon = ButtonState.loading;
});
var url = 'https://google.com';
final response = await http.get(url);
if (response.statusCode == 200 || response.statusCode == 201) {
setState(() {
//sets the state of stateTextWithIcon to success if whatever request made was successful
stateTextWithIcon= ButtonState.success;
});
} else {
setState(() {
//sets the state of stateTextWithIcon to fail if the request was unsuccessful
stateTextWithIcon = ButtonState.fail;
});
}
}
关于Flutter Progress_state_button - 如何更改按钮状态,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/64163503/