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I'm a complete newbie when it comes to iOS programming and much less Core Data. It's rather non-intuitive for me, as I really came into my own with programming with MATLAB, which I guess is more of a 'scripting' language.
At any rate, my problem is that I had no idea what I had to do to create a…
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I have problems, when i install app from Xcode all works but if I build app and install it from iTunes I have an error with the database at launch.
This happens only than i have changes in the core data model and need to migrate to a new version.
At first launch at crashes with message:
Thread 0:
0…
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My app makes updates in background thread then saves context changes.
And in main context there is a table view that works with NSFetchedResultsController.
For some time updates work correctly, but then exception is thrown.
To check this I've added NSLog(@"%@", [self.controller fetchedObjects]); to…
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I'm have an issue where i'm updating a many-to-many relationship in a background thread, which works fine in that threa, but when I send the object back to the main thread the changes do not show. If I close the app and reopen the data is saved fine and the changes show on the main thread. Also using…
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I know this question has been asked before, and I took a look at the answer to this question. However, I'm still confused as to how to implement reordering with a UITableView in a Core Data project. What I know is that I need to have a "displayOrder" attribute in my Entity to track the order of items…
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I am writing a program in Objective-C (XCode 3.2, on Snow Leopard) that is capable of either selectively blocking certain sites for a duration or only allow certain sites (and thus block all others) for a duration. The reasoning behind this program is rather simple. I tend to get distracted when I…
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Hi,
I made an Objective-C project for the iPhone. I had only one cpp class, the soundEngine taken from some Apple demo. Now I'm trying to merge OpenFeint which is coded in Objective-C++. As soon as I drop in the code without even referring to it from my code, when I hit Build, my Objective-C code…
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Does anyone know of a way to add additional attribute types to the @property keyword without modifying the compiler? Or can anyone think of another way to genericize getter/setter creation?
Basically, I have a lot of cases in a recent project where it's handy for objects to lazily instantiate their…
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What's the ObjectiveC syntax for specifying a protocol as an argument in a method?
Say I have 2 protocols, MyProtocol and MyProtocolCB:
@protocol MyProtocolCB <NSObject>
- (void) func;
@end
@protocol MyProtocol <NSObject>
- (void) register:(MyProtocolCB*) cb;
@end
I'm receiving this…
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I am developing an iPhone application and I use HTML to display formatted text.
I often display the same webpage, but with a different content. I would like to use a template HTML file, and then fill it with my diffent values.
I wonder if ObjectiveC has a template system similar to ERB in Ruby.
That…
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