我下面有一个if语句的一部分,它对Facebook和instagram进行了一些API调用。我在获取其中的“ instagram”部分以将数据推送到数组时遇到了麻烦。我认为这是一个范围问题,但不确定-也许您可以告诉我为什么我什么也没推送到数组中。评论说明发生了什么。我无法将instagram帖子推送到instaFormattedPosts数组。
else if(responseData.fbData && responseData.fbData.instaId){
//First Get Fb Posts - I push them into this array, 'fbFormattedPosts' then use thatlater to update state. This one works, fbPost object gets pushed forEach() fbPosts.data response.
let fbFormattedPosts = []
response = await fetch(`https://graph.facebook.com/${fbDataTemp.pageId}/feed?access_token=${fbDataTemp.pageAccessTokenLong}`)
let fbPosts = await response.json()
fbPosts.data.forEach(post => {
if(post.message){
let fbPostObject = {
type: 'text',
data: post.message,
link: `http://www.facebook.com/${post.id}`,
date: post.created_time,
postId: post.id,
rockOn: []
}
fbFormattedPosts.push(fbPostObject)
}
})
//Get IG Media Ids - This returns a list of instagram id's.
let instaFormattedPosts = []
response = await fetch(`https://graph.facebook.com/v7.0/${fbDataTemp.instaId}/media?access_token=${fbDataTemp.pageAccessTokenLong}`)
let instaPosts = await response.json()
//Get IG Posts - Alright here is where I cant get the instaPostObject to push to isntaFormattedPosts array...
instaPosts.data.forEach(async instaId => {
const instaResponse = await fetch(`https://graph.facebook.com/${instaId.id}?fields=id,media_url,timestamp,username&access_token=${fbDataTemp.pageAccessTokenLong}`)
let instaPostRendered = await instaResponse.json()
let instaPostObject = {
type: 'instagram',
data: instaPostRendered.media_url,
link: `http://www.instagram.com/${instaPostRendered.username}`,
date: instaPostRendered.timestamp,
postId: instaPostRendered.id,
rockOn: [],
}
instaFormattedPosts.push(instaPostObject)
console.log(instaPostObject) //Returns the object with the right details.
})
console.log(instaFormattedPosts) // returns empty array..
//Set All Posts
setPosts([
...responseData.posts,
...fbFormattedPosts
.filter(({postId}) =>
!responseData.posts
.find(post => post.postId == postId)),
...instaFormattedPosts
])
}
[async await
不能与forEach
一起使用,它只会调用
// this will just loop through all the data inside and instaPosts
// and not wait to complete inside block
instaPosts.data.forEach(async instaId => {
// your code
instaFormattedPosts.push(instaPostObject)
console.log(instaPostObject) //Returns the object with the right details.
})
解决方案:循环很简单
for (let i=0 ; i< instaPosts.data.length ; i++) {
const instaId = instaPosts.data[i];
const instaResponse = await fetch(`https://graph.facebook.com/${instaId.id}?fields=id,media_url,timestamp,username&access_token=${fbDataTemp.pageAccessTokenLong}`)
let instaPostRendered = await instaResponse.json()
let instaPostObject = {
type: 'instagram',
data: instaPostRendered.media_url,
link: `http://www.instagram.com/${instaPostRendered.username}`,
date: instaPostRendered.timestamp,
postId: instaPostRendered.id,
rockOn: [],
}
instaFormattedPosts.push(instaPostObject)
console.log(instaPostObject) //Returns the object with the right details.
}
console.log(instaFormattedPosts) // <---- CHECK NOW