objective c - How to slicing image and stretchable in iOS -

i need stretch image right , left side centre half circle remain is. need half circle in center

i have tried slicing concept , tried below code

uiimage *image = self.imgbgbottom.image; cgfloat capwidth =  floorf(image.size.width / 2) - 50; cgfloat capheight =  0; uiimage *capimage = [image resizableimagewithcapinsets:                      uiedgeinsetsmake(capheight, capwidth, capheight, capwidth)];  [self.imgbgbottom setimage:capimage]; 

but not working me

please me. in advance.

you using function, use - (uiimage *)stretchableimagewithleftcapwidth:(nsinteger)leftcapwidth topcapheight:(nsinteger)topcapheight instead - (uiimage *)resizableimagewithcapinsets:(uiedgeinsets)capinsets.

set top, left cap stretch image described in following code.

objective-c

uiimage *image = [uiimage imagenamed:@"test"];  cgfloat captop =  50;  // top cap keep half round cgfloat capleft = 5; // repeat or stretch equally. uiimage *capimage = [image stretchableimagewithleftcapwidth:capleft topcapheight:captop]; 

swift

let image =  uiimage(named: "stretchableimage")  let captop:int =  50;  // top cap keep half round let capleft:int = 5; // repeat or stretch equally. let capimage = image?.stretchableimage(withleftcapwidth: capleft, topcapheight: captop) 

alternet solution

same result can achieved using following function well.

objective-c

uiimage *stretchedimage = [image resizableimagewithcapinsets:                  uiedgeinsetsmake(50, 50, 0, 50)]; 

swift

var stretchedimage = image?.resizableimage(withcapinsets: uiedgeinsets(top: 50, left: 50, bottom: 0, right: 50), resizingmode: .stretch)  

note : keep stretchable image small possible otherwise not stretch smaller image container(imageview, button etc.). can reduce height & width of existing image.