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IOS apprentice3

时间:2015-04-20 16:41:59      阅读:137      评论:0      收藏:0      [点我收藏+]

1. Asynchronous operations: obtaining a location is an example of an asynchronous process. it is said to be operating "in the background". As soon as the operation is done, hte app is notified through a delegagte so that it can process the results

2. watchdog timer

 

IOS apprentice3

原文:http://www.cnblogs.com/glee/p/4441666.html

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