Angular Material组件（matInput等）无法正常显示问题求助

问题背景 #

手动编写matInput、matFormField、matSelect等Angular Material组件时显示正常，通过AI生成剩余代码粘贴后，该组件内所有Material组件失效，此前手动编写的部分也无法加载样式，其他组件的Material显示正常，重新粘贴代码无法解决。

组件HTML代码 #

<div class="card">
    <div class="card-body">
        <div class="row">
            <div class="row">
                <div class="col-sm-12 m-3">
                    <mat-form-field class="w-100">
                        <mat-label>Nome do Projeto:</mat-label>
                        <input matInput [(ngModel)]="projeto.nome" type="text" name="nome" required>
                        <mat-error>O Campo é obrigatório</mat-error>
                        </mat-form-field>
                </div>
                <div class="col-sm-12">
                    <mat-form-field>
                        <mat-label>Descrição</mat-label>
                        <textarea [(ngModel)]="projeto.descricao" matInput
                                cdkTextareaAutosize
                                #autosize="cdkTextareaAutosize"
                                cdkAutosizeMinRows="1"
                                cdkAutosizeMaxRows="5" name="descricao"></textarea>
                    </mat-form-field>
                </div>
            </div>
            <div class="col-12">
                <div class="row">
                    <div class="col-6 w-100">
                        <div class="row">
                            <div class="col-sm-12">
                                <mat-form-field class="w-100">
                                    <mat-label>Nome do Projeto:</mat-label>
                                    <input type="text" [(ngModel)]="projeto.progresso" name="progresso"
                                                placeholder="Exemplo: 50%" required>
                                    <mat-error>O Campo é obrigatório</mat-error>
                                    </mat-form-field>
                            </div>
                            <div class="col-sm-12">
                                <mat-form-field>
                                    <mat-label>Estado</mat-label>
                                    <mat-select [(ngModel)]="projeto.estado" name="estado">
                                        <mat-option value="Pedido">Pedido</mat-option>
                                        <mat-option value="Em Progresso">Em Progresso</mat-option>
                                        <mat-option value="Feito">Feito</mat-option>
                                    </mat-select>
                                    </mat-form-field>
                            </div>
                        </div>
                    </div>
                    <div class="col-6 w-100">
                        <div class="row">
                            <div class="col-sm-12">
                                <mat-form-field>
                                    <mat-label>Data de Início</mat-label>
                                    <input matInput type="date" [(ngModel)]="projeto.data_inicio" name="data_inicio">
                                    </mat-form-field>
                            </div>
                            <div class="col-sm-12">
                                <mat-form-field>
                                    <mat-label>Data Fim Prevista</mat-label>
                                    <input matInput type="date" [(ngModel)]="projeto.data_fim_prevista" name="data_fim_prevista">
                                    </mat-form-field>
                            </div>
                            <div class="col-sm-12">
                                <mat-form-field>
                                    <mat-label>Tipo Projeto</mat-label>
                                    <mat-select [(ngModel)]="projeto.tipo_projeto" name="tipo_projeto">
                                        <mat-option value="Interno">Interno</mat-option>
                                        <mat-option value="Externo">Externo</mat-option>
                                    </mat-select>
                                    </mat-form-field>
                            </div>
                            <div class="col-sm-12">
                                <mat-form-field>
                                    <mat-label>Cliente</mat-label>
                                    <mat-select [(ngModel)]="projeto.id_cliente" name="id_cliente">
                                        <mat-option [value]="5">Localhost</mat-option>
                                        <mat-option *ngFor="let cliente of clientes" [value]="cliente.id_cliente">
                                        {{ cliente.nome }}
                                        </mat-option>
                                    </mat-select>
                                    </mat-form-field>
                            </div>
                            <div class="col-sm-12">
                                <div class="input-group input-group-sm mb-3">
                                    <mat-form-field class="w-100">
                                        <mat-label>Sumário:</mat-label>
                                        <input type="text" [(ngModel)]="projeto.sumario" name="sumario" required>
                                        <mat-error>O Campo é obrigatório</mat-error>
                                        </mat-form-field>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
    <div class="card-footer">
        <button class="meu-botao" [disabled]="isCreating" (click)="criarProjeto()">
            {{ isCreating ? 'Aguarde...' : 'Gravar' }}
        </button>
    </div>
</div>

显示情况 #

• 当前显示：表单元素为无Material样式的原生控件，无浮动标签、圆角边框等Material特征
• 预期显示：带有Angular Material标准样式的输入框、下拉框，包含浮动标签、主题配色、交互反馈等

排查与修复步骤 #

1. 补全缺失的matInput指令 #

AI生成的代码中有两处<input>未添加matInput指令，这是Material组件无法识别的核心问题：

• 修复progresso输入框：

  <input matInput type="text" [(ngModel)]="projeto.progresso" name="progresso" placeholder="Exemplo: 50%" required>
  

• 修复sumario输入框：

  <input matInput type="text" [(ngModel)]="projeto.sumario" name="sumario" required>
  

2. 验证模块导入 #

确保当前组件所在模块已导入所有依赖的Material模块及表单模块：

import { MatInputModule } from '@angular/material/input';
import { MatFormFieldModule } from '@angular/material/form-field';
import { MatSelectModule } from '@angular/material/select';
import { MatDatepickerModule } from '@angular/material/datepicker';
import { MatNativeDateModule } from '@angular/material/core';
import { FormsModule } from '@angular/forms';
import { ReactiveFormsModule } from '@angular/forms';

@NgModule({
  imports: [
    // 其他基础模块
    MatInputModule,
    MatFormFieldModule,
    MatSelectModule,
    MatDatepickerModule,
    MatNativeDateModule,
    FormsModule,
    ReactiveFormsModule
  ],
  declarations: [YourComponent]
})
export class YourComponentModule { }

3. 检查全局样式导入 #

确认全局样式文件（如styles.scss）已导入Angular Material主题：

@import '@angular/material/prebuilt-themes/indigo-pink.css';

4. 清除缓存重启项目 #

执行以下命令清除缓存后重启项目，避免缓存导致的样式加载异常：

ng clean
ng serve

内容的提问来源于stack exchange，提问作者m3rci0