Question

Possible Duplicate:
Understanding NSString comparison in Objective-C

Header file:

@property (nonatomic, strong) NSString *pid;
@property (nonatomic, strong) NSString *name;

Coredata NSString stored:

[newPref setValue: @"0" forKey:@"pid"];  //correctly show in DB & NSLog
[newPref setValue: @"Sales" forKey:@"name"];

After later retrieving, evaluation fails:

if(preference.pid == @"0")

Debugger says:

_pid = (NSSting *) 0x... @"o\xee\"
_name = (NSString *) )x0.. @<variable is not NSString>

Is my storing of the NSString incorrect, or is my evaluation wrong?
Note: The Coredata model is type string also.

Answer 1

In your code, you are comparing the objects, but if you want to compare strings, it should be

if ([preference.pid isEqualToString:@"0"])