IOS Compressed picture resolution

+  (uiimage *) Imagewithmaxside: (cgfloat) Length sourceimage: (uiimage *) image{     CGFloat scale = [[UIScreen mainScreen] scale];     Cgsize imgsize = cwsizereduce (image.size, length);     uiimage * Img = nil;    uigraphicsbeginimagecontextwithoptions (imgSize, YES,  Scale);  //  Create a  bitmap context    [image drawinrect: CGRectMake (0, 0, imgsize.width, imgsize.height)              blendMode:kCGBlendModeNormal alpha:1.0];               //  draw a picture to the current  context       Img = uigraphicsgetimagefromcurrentimagecontext ();             //  from Current &Get the picture you just drew in nbsp;context       uigraphicsendimagecontext ();     return img;} Static inlinecgsize cwsizereduce (Cgsize size, cgfloat limit)    //   proportionally reduced size {    cgfloat max = max (size.width, size.height);     if  (Max < limit)  {         return size;    }    cgsize imgsize;     cgfloat ratio = size.height / size.width;    if  (size.width  > size.height)  {        imgSize =  Cgsizemake (Limit, limit*ratio);    } else {         imgsize = cgsizemake (Limit/ratio, limit);    }     reTurn imgsize;} 

IOS Compressed picture resolution