0){ this.books[index].count = parseInt(this.books[index].count) - 1; } },deleteBook(book){ // vue 给我们提供了一个 $remove的方法，在数组中删除 this.books.$remove(book); /*this.books = this.books.filter((item)=>{ return item != book })*/ },count:'' } } }

0){ book.count = parseInt(book.count) - 1; } }