Drawing gradient over image in ios

Question

How to create gradient colour look like following image programatically.

Answer 1

This is the best approach, working for me as requirement

CAGradientLayer *gradientLayer = [CAGradientLayer layer];
gradientLayer.frame = yourImageView.layer.bounds;

gradientLayer.colors = [NSArray arrayWithObjects:
                        (id)[UIColor colorWithWhite:1.0f alpha:1.0f].CGColor,
                        (id)[UIColor colorWithWhite:0.0f alpha:0.9f].CGColor,
                        nil];

gradientLayer.locations = [NSArray arrayWithObjects:
                           [NSNumber numberWithFloat:0.0f],
                           [NSNumber numberWithFloat:1.0f],
                           nil];

[yourImageView.layer addSublayer:gradientLayer];