由于现在已经从服务器接收完数据，请求就完成了，可以关闭网络活动指示器了，如清单4所示。
Because you are done receiving data from the server at this point, your request is complete and you can turn off the network activity indicator, as listing 4 demonstrates.
如此设置就可以在iPhoneUI 上显示一个可见的指示器，表示有网络活动正在进行。
This setting displays a visual indicator on the iPhone UI that there is network activity in progress.
如此设置就可以在iPhoneUI 上显示一个可见的指示器，表示有网络活动正在进行。
This setting displays a visual indicator on the iPhone UI that there is network activity in progress.
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