In this latest installment of my iCloud series I'll be taking a look at real world iCloud. Not in the sense of how you should write code to make effective use of iCloud, but in the sense of finding out how people are actually using it in real shipping apps. This was one of my primary purposes in writing momdec, my Core Data model decompiler, and I'll use it here to see what turns up. I included a…read more →
In today's installment of my continuing series on using iCloud with Core Data I'm going to discuss how factors beyond your control may render iCloud unusable, even if everything is working normally. Even if everything is working correctly, the current API can still require complex workarounds to get decent app performance. Through this, keep in mind that as with my previous post, I'm sticking to…read more →
From the README on github:
momcom is a command-line tool for Mac OS X that takes an uncompiled Core Data model created with Xcode and compiles it to produce a compiled
.momdsuitable for use at run time.
Please note that momcom is experimental. Although it is intended to be at least as as functional as compiling a data model using Xcode's built-in model compiler, it is not mature enough to recommend as a replacement. It was written mostly as an experiement to see if it could be done.
After writing momdec I realized I could probably compile models as well as decompile them. So, I wrote some code to do so. Twitter comments by John "Wolf" Rentzsch about how hard it might be may have spurred me on a bit. The code also fixes a bug I found in Xcode's model compiler (rdar://problem/13677527 and http://openradar.appspot.com/radar?id=2948402).
Fixing a bug wasn't the real reason, though. Once I realized this was probably possible, I had to find out. It was!
I also added a fork of mogenerator that uses
momcom's internal classes.
mogenerator normally uses Xcode's model compiler to get a working model and then uses that to generate class files. In this fork
momcom code to compile the model directly when possible.
From the README on github:
momdec is a command-line tool for Mac OS X that takes a compiled Core Data model and decompiles it to produce an equivalent xcdatamodel or xcdatamodeld suitable for use in Xcode. The resulting model file can also be used with mogenerator to produce source code files for Core Data entities which have custom subclasses.
My latest open source project. A compiled managed object model contains enough information to reconstruct an equivalent editable model file. So, I thought, wouldn't it be interesting to actually do that?permalink
Today I'm continuing my series of iCloud/Core Data-related posts with a discussion of duplicate data, how and why it occurs, and what you can do about it in your apps. As with my previous post in this series, today I'm sticking to how things are supposed to work and sometimes actually do. The problem of duplicate data isn't actually specific to iCloud. It can happen in any case where people might…read more →