在进入下一个视图中需要确保当前的控制段都被选中了

-(void)checkAllSegments
{   BOOL alertShown;
    alertShown = NO;
    for (UISegmentedControl *swItem in allSegmentControlOutlet) {
        int selectedSegment = swItem.selectedSegmentIndex;
        swItem.segmentedControlStyle = UISegmentedControlStyleBar;
//didPass = YES;
        if (selectedSegment == -1) {
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Fill in all forms"
                                                            message:@"Please go back and fill in missing info"
                                                           delegate:nil
                                                  cancelButtonTitle:@"OK"                                                  otherButtonTitles:nil];

           // [swItem setTintColor:[UIColor redColor]];
            if (!alertShown) {
                [alert show];
                alertShown = YES;
                didPass = NO;
                return;
            }
        }
    }
    if (didPass) {
        [self performSegueWithIdentifier:@"ToHiring" sender:self];
        }
}

但是我不知道应该将 didPass = YES;放到哪，这句代码所在的位置会被注释掉。除非最后一条循环完成。有没有更好的方法解决？