12月1日学习进度

一.今天做了什么
Mes系统手机前端
package com.leap.mes.ui.page

import android.widget.Toast
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.material3.Button
import androidx.compose.material3.Text
import androidx.compose.material3.TextField
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.text.input.PasswordVisualTransformation
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import androidx.lifecycle.viewmodel.compose.viewModel
import androidx.navigation.NavHostController
import androidx.navigation.compose.rememberNavController
import com.leap.mes.ui.theme.MesTheme
import com.leap.mes.logic.viewModel.AppViewModelProvider
import com.leap.mes.logic.viewModel.LoginViewModel

@Composable
fun Login(
navHostController: NavHostController,
viewModel: LoginViewModel = viewModel(factory = AppViewModelProvider.Factory)
){

val context = LocalContext.current // 获取上下文

if (viewModel.loginStatus) {

    LaunchedEffect(Unit) {
        Toast.makeText(context, "登录成功！", Toast.LENGTH_SHORT).show()
        navHostController.navigate("lqrw")
    }

}
Column(
    modifier = Modifier
        .fillMaxSize()
        .padding(16.dp),
    verticalArrangement = Arrangement.Center,
    horizontalAlignment = Alignment.CenterHorizontally
) {
    Text(text = "登录", fontSize = 32.sp, color = Color.Black)

    Spacer(modifier = Modifier.height(16.dp))

    TextField(
        value = viewModel.id,
        onValueChange = {viewModel.id = it},
        label = { Text("请输入账号") },
        modifier = Modifier.fillMaxWidth()
    )

    Spacer(modifier = Modifier.height(8.dp))

    TextField(
        value = viewModel.password,
        onValueChange = { viewModel.password = it },
        label = { Text("请输入密码") },
        modifier = Modifier.fillMaxWidth(),
        visualTransformation = PasswordVisualTransformation() // 将密码隐藏
    )

    Spacer(modifier = Modifier.height(16.dp))

    Button(onClick = { viewModel.login() }) {
        Text(text = "登录")
    }
}

}

@Preview(showBackground = true)
@Composable
fun LoginScreenPreview() {
MesTheme {
Login(navHostController = rememberNavController())
}
}