我正在下载一些数据和互联网连接线,在核心数据模型中从目前状态下载吗?
核心数据模型和下载之间没有任何关系。 你们必须区分这些步骤:
Step 1 will be handled with a NSURLRequest.
Step 2 can be caught in the NSURLConnection delegate methods.
Step 3 is should be routine if you were successful. If not, you would have to analyze your data object to see what you can salvage and save.
Step 4 can be accomplished with the Reachability class. Check Apple s sample code.
Step 5 requires that your server can handle the selective data requests.
单一步骤有许多细节。 排流的最佳召集,并查阅文件,以规范各个步骤。 我希望这一计划有助于你解脱。
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