App crashes on iPad but works well on iPhone4 and iTouch
self.remindItem = [[[UITabBarItem alloc] initWithTitle:@"提醒"
                                   image:[UIImage imageNamed:@"remind.png"] tag:0] autorelease];
[self.remindItem setFinishedSelectedImage:[UIImage imageNamed:@"remind_tapped.png"]
         withFinishedUnselectedImage:[UIImage imageNamed:@"remind.png"]];
self.remindItem.badgeValue = @"2";