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我收到以下错误：

**Error1:** Cannot find a differ supporting object '[object Object]' of type 'object'. NgFor only supports binding to Iterables, such as Arrays. Did you mean to use the keyvalue pipe? 
**Error2:** this.blogs.push is not a function

我的代码如下所示：

export class BlogComponent {
  blogs: Array<blogType>;

  constructor() {
    this.blogs = new Array<blogType>();
  }

  ngOnInit() {
    this.blogs = JSON.parse(localStorage.getItem("blogs")!);
  }

 addBlog(title: any, content: any) {

    let blog = new blogType(title.value, content.value);
    if (localStorage.getItem('blogs')) {
      this.blogs = JSON.parse(localStorage.getItem('blogs')!);
    }

    this.blogs.push(blog); //error occurs because of that line. Runtime error
    localStorage.setItem('blogs', JSON.stringify(this.blogs));
    title.value = '';
    content.value = '';
    alert('Blog Added!');
  }

我试图从“blog”数组中获取数据并将其推送到“blog”数组中，以便将其存储到本地存储中，但由于以下行，我收到了一个错误：this.blogs.push(blog);