transformRequest用来转化请求的格式

request({
url: url,
method: ‘POST’,
data:data,
headers: { ‘Content-Type’: ‘application/x-www-form-urlencoded’ },
transformRequest : [function (data) {
let ret = ‘’
for (let it in data) {
ret += encodeURIComponent(it) + ‘=’ + encodeURIComponent(data[it]) + ‘&’
}
return ret
}]
}).then(result => {}）