backBarButtonItem 颜色 图片

    UIBarButtonItem *backItem = [[UIBarButtonItem alloc] init];
    //temporaryBarButtonItem.title =@"返回";    
    [backItem setTintColor:[UIColor colorWithRed:240.0/255 green:160.0/255 blue:80.0/255.0 alpha:1]];
    
    self.navigationItem.backBarButtonItem = backItem;