objective-c - 已经上传的图片能查看缩略图么

Question

我已经上传了图片，再次下载的时候能不能先不直接下载原图，先下载缩略图，点击查看的时候再下载原图

Answer 1

Crop the middle part and reduce it proportionally to generate a 200x200 thumbnail:

http://78re52.com1.z0.glb.clouddn.com/resource/gogopher.jpg?imageView2/1/w/200/h/200

You can refer to http://developer.qiniu.com/code/v6/api/kodo-api/image/imageview2.html#imageView2-samples