objective-c - IOS七牛上传错误码-2是什么意思啊，每次上传都出这样的错误

Question

key=20160909100242 resp=(null)info=-2==Error Domain=qiniu.com Code=-2 "未能完成操作。（“qiniu.com”错误 -2。）" UserInfo=0x175c65a00 {error=cancelled by user}

Answer 1

error=cancelled by user
主動被cancelled ,是否是上傳邏輯有問題？