Angular 角度值到达子组件模板，但在ngOnInit中未定义

当我将值传递给子组件时，值将出现在模板中，但不会显示在子组件的ngOnInit中

父组件

<div class="overview bg-blue-pattern">prospectId {{prospectId}}
        <app-calls-log-history [prospectid]="prospectId"></app-calls-log-history>
    </div>

prospectId{{prospectId}

童装

<div class="calls-log-history-container">
        prospectId {{prospectid}}
    </div>

prospectId{{prospectId}}

子组件ts文件

import { Component, OnInit,Input } from '@angular/core';
import { ContactFilterService } from '../../../../services/contact.service';

@Component({
  selector: 'app-calls-log-history',
  templateUrl: './calls-log-history.component.html',
  styleUrls: ['./calls-log-history.component.scss']
})
export class CallsLogHistoryComponent implements OnInit {
  @Input() prospectid: any;
  CallsLogHistory: Array<any> = [];
  constructor( private _contactFilterService: ContactFilterService) { }
  ngOnInit() {
    console.log('prospectid : '+ this.prospectid); // coming as undefined
    this._contactFilterService.getCallsLogHistory(this.prospectid).subscribe(
        result => {
            this.CallsLogHistory = result.notes;
        }
    );
  }
}

从'@angular/core'导入{Component，OnInit，Input}；
从“../../../../services/contact.service”导入{ContactFilterService}；
@组成部分({
选择器：“应用程序调用日志历史记录”，
templateUrl:'./调用log history.component.html'，
styleUrls:['./调用日志历史记录.component.scss']
})
导出类CallsLogHistoryComponent实现OnInit{
@Input（）prospectid:any；
CallsLogHistory:Array=[]；
构造函数（私有_contactFilterService:contactFilterService）{}
恩戈尼尼特（）{
console.log（'prospectid:'+this.prospectid）；//未定义
此.\u contactFilterService.getCallsLogHistory（this.prospectid）.订阅(
结果=>{
this.CallsLogHistory=result.notes；
}
);
}
}
简短回答，使用
*ngIf

<div class="overview bg-blue-pattern" *ngIf="prospectId">prospectId {{prospectId}}
    <app-calls-log-history [prospectid]="prospectId"></app-calls-log-history>
</div>

prospectId{{prospectId}
简短回答，使用
*ngIf

<div class="overview bg-blue-pattern" *ngIf="prospectId">prospectId {{prospectId}}
    <app-calls-log-history [prospectid]="prospectId"></app-calls-log-history>
</div>

prospectId{{prospectId}