Simple way how to achieve Linear Gradient View in Objective-c

LinearGradientView.h

#import <UIKit/UIKit.h>

@interface LinearGradientView : UIView

@end

LinearGradientView.m

#import "LinearGradientView.h"

@implementation LinearGradientView

- (void)drawRect:(CGRect)rect
{
    CGContextRef currentContext = UIGraphicsGetCurrentContext();
  
    CGGradientRef glossGradient;
    CGColorSpaceRef rgbColorspace;
    size_t num_locations = 2;
    CGFloat locations[2] = { 0.7, 1.0 };
    CGFloat components[8] = {
		0.00, 0.00, 0.00, 1,  // End color
		0.20, 0.20, 0.20, 1,  // Start color
	};
	
    rgbColorspace = CGColorSpaceCreateDeviceRGB();
    glossGradient = CGGradientCreateWithColorComponents(rgbColorspace, components, locations, num_locations);
	
    CGRect currentBounds = self.bounds;
	CGPoint topCenter = CGPointMake(CGRectGetMidX(currentBounds), CGRectGetMaxY(currentBounds));
    CGPoint minCenter = CGPointMake(CGRectGetMidX(currentBounds), CGRectGetMinY(currentBounds));
	
	CGContextDrawLinearGradient(currentContext, glossGradient, topCenter, minCenter, nil);
	
    CGGradientRelease(glossGradient);
    CGColorSpaceRelease(rgbColorspace);
}

@end