如何重新加载 NSFetchedResultsController？
我有一个应用程序，可以预加载一个月的数据，并且每天发布一次。
NSDate *now = [NSDate date];
// Create predicate
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"(location.name == %@) AND (date < %@)",longLocation,now];
在多任务处理之前，一切都运行良好，但现在它不再从零开始，我无法让它识别新日期并根据该新日期重新加载数据。
我已将视图加载到 TabBarController 中。它似乎想永远保留该视图，而我似乎无法让 viewWillAppear 执行任何操作。
任何帮助将不胜感激。 谢谢
I have an app that preloads a months worth of data and it gets released a day at a time.
NSDate *now = [NSDate date];
// Create predicate
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"(location.name == %@) AND (date < %@)",longLocation,now];
Everything worked great before multi-tasking, but now that it no longer starts from nil I cannot get it to recognize the new date and reload the data based on that new date.
I have the view loaded into a TabBarController. It seems to want to hang onto that view forever and I can't seem to get viewWillAppear to do anything.
Any help would be greatly appreciated.
Thanks
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如果您的 fetchRequestController 使用缓存，并且您想修改 fetchRequest（例如更改谓词），则必须在再次使用 PerformFetch 之前删除缓存
If your fetchRequestController uses a cache and if you want to modify the fetchRequest (for example changing a predicate) you have delete the cache before using performFetch again