在Angular中，订阅不保存数据到数组中的解决方法有以下几种：

1. 使用map操作符转换数据并保存到数组中：

import { Component } from '@angular/core';
import { HttpClient } from '@angular/common/http';

@Component({
  selector: 'app-example',
  template: `
    

      
{{ item }}
    
  `
})
export class ExampleComponent {
  data: any[] = [];

  constructor(private http: HttpClient) {
    this.http.get('https://api.example.com/data')
      .pipe(map(response => response.data))
      .subscribe(result => {
        this.data = result;
      });
  }
}

2. 使用tap操作符副作用来保存数据到数组中：

import { Component } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { tap } from 'rxjs/operators';

@Component({
  selector: 'app-example',
  template: `
    

      
{{ item }}
    
  `
})
export class ExampleComponent {
  data: any[] = [];

  constructor(private http: HttpClient) {
    this.http.get('https://api.example.com/data')
      .pipe(
        tap(result => {
          this.data = result;
        })
      )
      .subscribe();
  }
}

3. 使用BehaviorSubject作为数据源：

import { Component } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { BehaviorSubject } from 'rxjs';

@Component({
  selector: 'app-example',
  template: `
    

      
{{ item }}
    
  `
})
export class ExampleComponent {
  data$: BehaviorSubject = new BehaviorSubject([]);

  constructor(private http: HttpClient) {
    this.http.get('https://api.example.com/data')
      .subscribe(result => {
        this.data$.next(result);
      });
  }
}

在这个例子中，我们使用了BehaviorSubject来保存数据，并使用async管道在模板中订阅数据的变化。这种方法可以在组件中的任何地方订阅数据的变化，并保持同步。