一、Can't bind to 'ngModel' since it isn't a known property of 'input'.
解决方案：提示你包含'ngModel'的相关模块没有引入，只要引入在app.module.ts中引入FormsModule
import { FormsModule }
from
'@angular/forms';
别忘了在@NgModule中imports中写上FormsModule
imports: [
BrowserModule,
FormsModule
],