ios - CAGradientLayer with Angle -

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i drawing cgpath not rectangle or square,and adding cgpath cashapelayer. cashapelayer's frame getting cgpath using cgpathgetboundingbox(path). rectangle or square. want set gradient color layer path not rectangle or square not spreading gradient color equally in whole cgpath. there way set gradient color cgpath or how can set gradient color angle?

please refer screen shot understand situation. here white color indicates frame of cgpath , green colour, our drawn cgpath. @ bottom of cgpath can see white gradient colour not distributed equally in cgpath.

enter image description here

enter image description here

the start , end points of linear gradient specified in points relative whole size of layer, (0,0) @ top left , (1,1) @ bottom right.

therefore, make linear gradient @ angle, need set start , end points appropriately. example, if used (0,0) , (1,1) start , end points, gradient run top left bottom right, @ 45 degree angle.

working out specific start , end points needs therefore matter of trigonometry.


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