问显示邮件后状态栏下的iOS 7导航栏-短信编写器

EN

float systemVersion=[[[UIDevice currentDevice] systemVersion] floatValue];
if(systemVersion>=7.0f)
{
    CGRect tmpFrame = self.navigationController.view.frame;
    tmpFrame.origin.y = 20;
    self.navigationController.view.frame = tmpFrame;
}

- (IBAction)act_shareSMS:(id)sender {
    
    MFMessageComposeViewController *controller = [[MFMessageComposeViewController alloc] init];
    NSString* message = @"adasdasd";
    controller.body =message;
    controller.messageComposeDelegate = self;
    
    if([NavigationManager sharedManager].contentNavigation)
        [[NavigationManager sharedManager].contentNavigation presentModalViewController:controller animated:YES];
}

- (void)messageComposeViewController:(MFMessageComposeViewController *)controller didFinishWithResult:(MessageComposeResult)result {

    [[NavigationManager sharedManager].contentNavigation dismissModalViewControllerAnimated:YES];

    if (result == MessageComposeResultCancelled) {
        NSLog(@"Message cancelled");
    } 
    else if (result == MessageComposeResultSent) {
       NSLog(@"Message sent");
    }
}