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});
} else {
    
await Future.delayed(Duration(milliseconds: 10));
showLoading();
}
}

@override void dispose() {
    
super.dispose();
setIsDispose(true);
viewModel.showLoadingFun = null;
viewModel.dismissLoadingFun = null;
}
}

abstract class BaseViewModel extends ChangeNotifier with BaseViewModelInterface, NavigatorMixin, ToastMixin, SharePreferenceMixin, EventBusMixin, DataBaseMixin {
    
int _loadNum = 0;
int _minLoadNum = 1;
late BuildContext context;
late M model;
bool _isDispose = false;

bool get isDispose => _isDispose;

int needLoadingRequestCount = 0;

bool isLoading = false;

Function()? showLoadingFun;

Function? dismissLoadingFun;

static bool isNeedCatchError = false; set minLoadNum(int value) {
    
_minLoadNum = value;
}

set loadNum(int value) {
    
_loadNum = value;
}

int get loadNum {
    
return _loadNum;
}

void notifyPage() {
    
if (!_isDispose) {
    
loadNum++;
print(">loadNum:$loadNum"); if (_loadNum >= _minLoadNum) {
    
print(">notifyListeners");
notifyListeners();
}
}
}

@override void init() {
    
model = getIt.get();
setContext(context);
setIsDispose(false);
}

void showLoading(bool isNeedLoading) {
    
if (isNeedLoading) {
    
needLoadingRequestCount++; if (!isLoading) {
    
isLoading = true; if (showLoadingFun != null) {
    
showLoadingFun!.call();
}
showLoadingFun?.call();
}
}
}

void dismissLoading(bool isNeedLoading) {
    
if (isNeedLoading) {
    
needLoadingRequestCount–; if (needLoadingRequestCount == 0) {
    
isLoading = false; if (dismissLoadingFun != null) {
    
dismissLoadingFun!.call();
}
dismissLoadingFun?.call();
}
}
}

///  Initiate network request , Handle exceptions at the same time ,loading void sendRequest(Future future, FutureOr onValue(T value),
{
    Function(Exception e)? error, bool isNeedLoading = false}) {
    
showLoading(isNeedLoading); future.then((t) {
    
dismissLoading(isNeedLoading);
onValue(t);
}); if (isNeedCatchError) {
    
future.catchError((e) {
    
dismissLoading(isNeedLoading);
print("====>error:$e"); if (error != null) {
    
error(e);
}
});
}
}

@override void dispose() {
    
super.dispose();
_isDispose = true;
setIsDispose(_isDispose);
}
}

@injectable class LoginViewModel extends BaseViewModel {
    
@factoryMethod LoginViewModel();

String loginName = “”;
String psw = “”; /// Sign in  void login() {
    
if (loginName.isEmpty) {
    
showToast(“ Login account cannot be empty ”);
} else if (psw.isEmpty) {
    
showToast(“ The login password cannot be empty ”);
} else {
    
sendRequest(model.login(loginName, psw), (value) {
    
if (value.errorCode == 0) {
    
value.data?.let((it) {
    
UserInfoSp.getInstance().uid = it.id ?? 0;
UserInfoSp.getInstance().token = it.token ?? “”;
UserInfoSp.getInstance().userName = it.username ?? “”;
});
pop();
push(MainPage());
} else {
    
showToast(value.errorMsg!);
}
}, isNeedLoading: true);
}
}
}

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