我的测试代码:
NSManagedObjectContext *context;
.....
NSAutoreleasePool *pool = [NSAutoreleasePool new];
User *u = (User *)[NSEntityDescription insertNewObjectForEntityForName:@"User" inManagedObjectContext:context];
NSLog(@"after create:%d", [u retainCount]);
[context deleteObject:u];
NSLog(@"after delete:%d", [u retainCount]);
[context save:NULL];
NSLog(@"after save:%d", [u retainCount]);
[pool drain];
[pool release];
NSLog(@"after pool release:%d", [u retainCount]);
[u release];
NSLog(@"after user release:%d", [u retainCount]);
u.loginName = @"aaaa";
结果:
2010-08-13 10:04:54.558 BriefCase[7448:207] after create:2
2010-08-13 10:04:54.560 BriefCase[7448:207] after delete:3
2010-08-13 10:04:54.561 BriefCase[7448:207] after save:1
2010-08-13 10:04:54.562 BriefCase[7448:207] after pool release:1
2010-08-13 10:04:54.563 BriefCase[7448:207] after user release:0
Program …