JS一个json对象如何遍历出每一个的值？

Question

我现在要获取里面的name值该怎么办。

Answer 1

首先你这个结构应该作为一个数组比较合适：

var data = [
  {name: 'asdfadfa'},
  {name: 'asdfadfa'},
  {name: 'asdfadfa'},
  {name: 'asdfadfa'},
  {name: 'asdfadfa'},
  {name: 'asdfadfa'}
];

然后按照你给的结构，这样遍历：

for(let i in data) {
  console.log(data[i].name);
}

若改成数组，则这样遍历：

for(let obj of data) {
  console.log(obj.name);
}

更多数组和对象遍历方法，请搜索“js 遍历数组”和“js 遍历对象”。

Answer 2

用Object.keys转成数组

Object.keys(data).map(key => {
    console.log(data.key.name);
})

Answer 3

使用ES6语法，一行可以解决：

var data = {
  1:{name: 'asdfadfa'},
  2:{name: 'asdfadfa'},
  3:{name: 'asdfadfa'},
  4:{name: 'asdfadfa'},
  5:{name: 'asdfadfa'},
  6:{name: 'asdfadfa'}
}

Object.values(data).map(x => x.name)

Answer 4

虽然这数据结构更应该使用数组，不过如果你想遍历这样的对象，你可以使用：
var data = {
0: {name: 'asdfadfa'},
1: {name: 'asdfadfa'},
2: {name: 'asdfadfa'},
3: {name: 'asdfadfa'},
4: {name: 'asdfadfa'},
5: {name: 'asdfadfa'}
};

data.length = 6;

Array.prototype.slice.call(data).map(val => val.name)

Answer 5

var data = {

    1 : {name: 'qweqweqwe'},
    2 : {name: 'qweqweqwe'},
    3 : {name: 'qweqweqwe'},
    4 : {name: 'qweqweqwe'}
  }

  for(let i in data){
    console.log(data[i].name)
  }

Answer 6

es6的object.values方法，直接转换成数组