SOURCE

// 循环串执行


let a = []
const arr = [{
	"name": "hosts.doc",
	"url": "/storage/emulated/0/ccs/hosts.doc",
	"sizeMB": "0.0009"
}, {
	"name": "hosts.pdf",
	"url": "/storage/emulated/0/ccs/hosts.pdf",
	"sizeMB": "0.0009"
}]

function get(e){
    // 网络请求
    return new Promise((resolve, reject) => {
        setTimeout(() => {
            resolve(e)
        }, 500)
    })
}

async function run(){
  let users = [{
	"name": "hosts.doc",
	"url": "/storage/emulated/0/ccs/hosts.doc",
	"sizeMB": "0.0009"
}, {
	"name": "hosts.pdf",
	"url": "/storage/emulated/0/ccs/hosts.pdf",
	"sizeMB": "0.0009"
}]
  let nameArray = [];
  for (item of users){
      console.log(item)
    const name = await get(item.name)
    nameArray.push(name);
  }
  console.log(nameArray);
}

run()

// console.log(a)
// arr.forEach((n,i)=>{
//     get(i).then(res=>{
//         console.log(res)
//         a.push(res)
//     })
// })


// a获取正确的值需要在arr遍历结束后再执行
// 怎么知道上面的遍历结束,或者遍历换一种写法?