My app appears to work terribly over cellular networks - the UI often has spinners instead of images, but not always. It uses NSURLConnections driven by concurrent NSOperations. It works fine on WIFI - no problems at all. My app appears to work terribly over cellular n
阅读背景：
为什么在通过蜂窝网络下载图像时总是会出现NSURLConnection超时？
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