ios - How to draw an image in a specific shape -

i ordinary image designer every new network call. design image must in shape this:

how can that? on android use path create such shape , use shader draw image in shape. don't find on ios?

thanks krivoblotsky. can use piece of code mask image:

- (uiimage*) _maskimage:(uiimage *) image withmask:(uiimage *) mask {     cgimageref imagereference = image.cgimage;     cgimageref maskreference = mask.cgimage;      cgimageref imagemask = cgimagemaskcreate(cgimagegetwidth(maskreference),             cgimagegetheight(maskreference),             cgimagegetbitspercomponent(maskreference),             cgimagegetbitsperpixel(maskreference),             cgimagegetbytesperrow(maskreference),             cgimagegetdataprovider(maskreference),             null,             yes     );      cgimageref maskedreference = cgimagecreatewithmask(imagereference, imagemask);     cgimagerelease(imagemask);      uiimage *maskedimage = [uiimage imagewithcgimage:maskedreference];     cgimagerelease(maskedreference);      return maskedimage; } 

you need make sure image black , not sort of black because used transparency.

this tutorial , shows mask image:

http://jeroendeleeuw.com/post/33638733049/how-to-mask-images-with-core-graphics-in-ios