gradient color for view.

UIView+Gradient.m

#import "CoreText/CoreText.h"

#import <QuartzCore/QuartzCore.h>

enum GradientType {
    LEFT2RIGHT = 1,
    TOP2BOTTOM = 2,
    RIGHT2LEFT = 3,
    BOTTOM2TOP = 4
};

@interface UIView(Gradient)

@end

@implementation UIView(Gradient)

-(void)setGradientColor:(CGRect)rc startColor:(UIColor *)startColor endColor:(UIColor *)endColor type:(enum GradientType)type 
{
    CAGradientLayer *gradient = [CAGradientLayer layer];
    gradient.frame = rc;
    gradient.colors = [NSArray arrayWithObjects:(id)startColor.CGColor, 
                       (id)endColor.CGColor, nil];
    
    if (LEFT2RIGHT==type) {
        gradient.startPoint = CGPointMake(0.0, 0.5);
        gradient.endPoint = CGPointMake(1.0, 0.5);
    } else if(RIGHT2LEFT==type) {
        gradient.endPoint = CGPointMake(0.0, 0.5);
        gradient.startPoint = CGPointMake(1.0, 0.5);
    } else if(BOTTOM2TOP==type) {
        gradient.endPoint = CGPointMake(0.5,0.0);
        gradient.startPoint = CGPointMake(0.5,1.0);
    }
    
    [self.layer insertSublayer:gradient atIndex:0];
}

@end

// [self setGradientColor:CGRectMake(100, 100, 100, 100) startColor:[UIColor redColor] endColor:[UIColor clearColor] type:RIGHT2LEFT];