CAGradientLayer

gistfile1.m

@interface FOOGradientLayer : NSObject

+ (CAGradientLayer *)gradientLayer;

@end

@implementation FOOGradientLayer

+ (CAGradientLayer *)gradientLayer {
    
    CAGradientLayer *gradientLayer = [CAGradientLayer layer];
    gradientLayer.colors = @[(id)[[UIColor redColor] CGColor], (id)[[UIColor greenColor] CGColor]];
    
    //gradientLayer.startPoint = CGPointMake(0.0f, 1.0f);
    //gradientLayer.endPoint = CGPointMake(1.0f, 0.0f);
    
    return gradientLayer;
}

@end

CAGradientLayer *gradientLayer = [FOOGradientLayer gradientLayer];
gradientLayer.frame = self.view.bounds;
[self.view.layer insertSublayer:gradientLayer atIndex:0];