ios7 - How to make this kind of effect in iOS, blur effect it is increasing leaner to lower side -

i searched this, didn't found exact solution problem, answer making blur effect shows making blur effect on entire frame want blur effect below image

in image blur effect @ bottom to, increasing leaner lower side

can 1 know how this, ideas or sample code ... :)

use cagradientlayer

uicolor *thecolor = [[uicolor alloc] initwithred:146.0/255.0 green:146.0/255.0 blue:146.0/255.0 alpha:1];  cagradientlayer *gradientlayer = [cagradientlayer layer];  cgrect gradientlayerframe = theview.frame; gradientlayerframe.origin.x = 0; gradientlayerframe.origin.y = 0; gradientlayer.frame = gradientlayerframe;  //build colors array gradient nsarray *colors = [nsarray arraywithobjects:                    (id)[thecolor cgcolor],                    (id)[[thecolor colorwithalphacomponent:0.9f] cgcolor],                    (id)[[thecolor colorwithalphacomponent:0.6f] cgcolor],                    (id)[[thecolor colorwithalphacomponent:0.4f] cgcolor],                    (id)[[thecolor colorwithalphacomponent:0.3f] cgcolor],                    (id)[[thecolor colorwithalphacomponent:0.1f] cgcolor],                    (id)[[uicolor clearcolor] cgcolor],                    nil];  gradientlayer.colors = colors;  [yourview.layer insertsublayer:gradientlayer atindex:0]; 

swift version of code here