为什么Angular调用一个明显定义的对象是未定义的？

// example.component.ts
export class ExampleComponent {
  myObject: any;

  constructor() {
    this.myObject = { key: 'value' };
  }

  someMethod() {
    console.log(this.myObject); // 确保这里能访问到myObject
  }
}

// example.component.ts
import { Component, OnInit } from '@angular/core';
import { DataService } from './data.service';

@Component({
  selector: 'app-example',
  templateUrl: './example.component.html',
  styleUrls: ['./example.component.css']
})
export class ExampleComponent implements OnInit {
  myObject: any;

  constructor(private dataService: DataService) {}

  ngOnInit() {
    this.dataService.getData().subscribe(data => {
      this.myObject = data;
    });
  }

  someMethod() {
    if (this.myObject) {
      console.log(this.myObject);
    } else {
      console.log('Data not loaded yet');
    }
  }
}

// example.component.ts
import { Component, AfterViewInit } from '@angular/core';

@Component({
  selector: 'app-example',
  templateUrl: './example.component.html',
  styleUrls: ['./example.component.css']
})
export class ExampleComponent implements AfterViewInit {
  myObject: any;

  ngAfterViewInit() {
    this.myObject = { key: 'value' };
  }

  someMethod() {
    console.log(this.myObject);
  }
}

// app.module.ts
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { ExampleModule } from './example/example.module';

@NgModule({
  declarations: [
    // 其他组件
  ],
  imports: [
    BrowserModule,
    ExampleModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

// data.service.ts
import { Injectable } from '@angular/core';

@Injectable({
  providedIn: 'root'
})
export class DataService {
  getData() {
    return of({ key: 'value' }); // 使用RxJS的of操作符模拟数据
  }
}