background alert ios color black radial

----------------------hi, i have this code for background radial :----------------------- size_t locationsCount = 2; CGFloat locations[2] = {0.0f, 1.0f}; CGFloat colors[8] = {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.75f}; CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB(); CGGradientRef gradient = CGGradientCreateWithColorComponents(colorSpace, colors, locations, locationsCount); CGColorSpaceRelease(colorSpace); CGPoint center = CGPointMake([login to view URL] / 2, [login to view URL] / 2); CGFloat radius = MIN([login to view URL], [login to view URL]) ; CGContextDrawRadialGradient (context, gradient, center, 0, center, radius, kCGGradientDrawsAfterEndLocation); CGGradientRelease(gradient); ------------------I want to add in this code:---------------------------- -(void)createBackgroundView { // Allocating controller for presenting MLTableAlert MLTableAlertController *controller = [[MLTableAlertController alloc] init]; [login to view URL] = [[UIColor clearColor]]; [[login to view URL] addSubview:[login to view URL]]; [[login to view URL] makeKeyAndVisible]; // Creating new UIWindow to manage MLTableAlert and MLTableAlertController //[login to view URL] = [[UIColor whiteColor] colorWithAlphaComponent:0.4]; [login to view URL] = controller; [login to view URL] = 0.0; [login to view URL] = UIWindowLevelStatusBar; [login to view URL] = NO; //[[login to view URL] addSubview:selectorView]; //[[login to view URL] makeKeyAndVisible]; // Adding MLTableAlert as subview of MLTableAlertController (controller) [[login to view URL] addSubview:self]; // setting options to MLTableAlert [login to view URL] = [login to view URL]; [login to view URL] = YES; // get background color darker [UIView animateWithDuration:0.3 animations:^{ [login to view URL] = 1.0; }]; }