objective-c - 将取得的图片放在一个数组里，用for循环调用单张图片上传的接口上传图片，为什么只有最后一张图片上传成功呀

Question

Answer 1

First of all, I don’t know OC very well. I don’t know whether your method of uploading pictures is single-threaded or multi-threaded. However, I feel that it should not be executed in a For loop. Putting it in a For loop will upload all pictures. You can consider it. Add an upload success event listener. After each picture is uploaded successfully or fails, the next picture is uploaded.

Answer 2

I still don’t understand why