ios - Swift Code for reducing / compressing pictures saved to parse -


please @ code below if believe there can done improve swift code please let me know - converted code objective-c off raw engineering website www.rawend.com

@ibaction func signup(sender: anyobject) {

    let imagedata = uiimagepngrepresentation(self.profilepic.image)      let image = uiimage(data: imagedata)      func compressimage(image:uiimage) -> nsdata {         // reducing file size 10th          var actualheight : cgfloat = image.size.height         var actualwidth : cgfloat = image.size.width         var maxheight : cgfloat = 1136.0         var maxwidth : cgfloat = 640.0         var imgratio : cgfloat = actualwidth/actualheight         var maxratio : cgfloat = maxwidth/maxheight         var compressionquality : cgfloat = 0.5          if (actualheight > maxheight || actualwidth > maxwidth){             if(imgratio < maxratio){                 //adjust width according maxheight                 imgratio = maxheight / actualheight;                 actualwidth = imgratio * actualwidth;                 actualheight = maxheight;             }             else if(imgratio > maxratio){                 //adjust height according maxwidth                 imgratio = maxwidth / actualwidth;                 actualheight = imgratio * actualheight;                 actualwidth = maxwidth;             }             else{                 actualheight = maxheight;                 actualwidth = maxwidth;                 compressionquality = 1;             }         }          var rect = cgrectmake(0.0, 0.0, actualwidth, actualheight);         uigraphicsbeginimagecontext(rect.size);         image.drawinrect(rect)         var img = uigraphicsgetimagefromcurrentimagecontext();         let imagedata = uiimagejpegrepresentation(img, compressionquality);         uigraphicsendimagecontext();          return imagedata;     }      let compressedimage = compressimage(image!)      let picture = pffile(name: "image.png", data: compressedimage)      pfuser.currentuser()!.setobject(picture, forkey: "profilepic")     pfuser.currentuser()!.saveinbackgroundwithblock {         (success: bool, error: nserror?) -> void in         if (success) {             println("image has been saved")         } else {             println("image failed")         }     } }


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