Page({ ??????onLoad(){ ??????????console.log(this)//this一 ??????????wx.request({ ??????????????url:?'https://c.y.qq.com/musichall/fcgi-bin/fcg_yqqhomepagerecommend.fcg?g_tk=1844339964&uin=3278805836&format=json&inCharset=utf-8&outCharset=utf-8&notice=0',? ? ??????????success(res)?{ ????????????console.log(this)//this二 ???????????? ??????????} ??????????}) ?????} })這是微信小程序的js腳本。為何第一個this指向page對象；而第二個this又是指向success函數本身？