How do NSEntityDescription and NSAttributeDescription work? - core-data

Question

I am trying to understand how these things work : NSEntityDescription, NSAttributeDescription, attributeType.
I think these few lines of code work, since I get what I expect for the value of X.
Can some one tell me how I should modify the inner part of the loop, that is the line : X++;
in order to get the names and type of the properties in the entity : "myentity" ?
//::::::::::::::::::::::::::: EXPERIMENT
MeDaSyAGAppDelegate *TheAppDelegate=[[UIApplication sharedApplication] delegate];
NSManagedObjectContext *TheContext=[TheAppDelegate managedObjectContext];
NSEntityDescription *TheEntityDesc;
TheEntityDesc=[NSEntityDescription entityForName:#"myentity" inManagedObjectContext:TheContext];
int X=0;
NSDictionary *attribs=[TheEntityDesc attributesByName];
for (NSAttributeDescription *eachA in [attribs allValues]) {
X++;
}
[self showMessageBox:[NSString stringWithFormat:#"X = %d.",X]];
//::::::::::::::::::::::::::: EXPERIMENT

Answer 1

First: Format your code. See below.
Second: try to do this:
NSLog(#"%#",eachA.name);//The name
NSLog(#"%d",[eachA attributeType])//The type, this is an integer
NSLog(#"%#",[eachA attributeValueClassName]);//Class name receiver
See:NSAttributeDescription Class Docs
Formatting: This looks better. (Attributes start with lower cases and use spaces)
//::::::::::::::::::::::::::: EXPERIMENT
MeDaSyAGAppDelegate *theAppDelegate = [[UIApplication sharedApplication] delegate];
NSManagedObjectContext *theContext = [TheAppDelegate managedObjectContext];
NSEntityDescription *theEntityDesc = [NSEntityDescription entityForName:#"myentity" inManagedObjectContext:TheContext];
int X = 0;
NSDictionary *attribs = [theEntityDesc attributesByName];
for (NSAttributeDescription *eachA in [attribs allValues]) {
X++;
}
[self showMessageBox:[NSString stringWithFormat:#"X = %d.", X]];
//::::::::::::::::::::::::::: EXPERIMENT