ios - Cropping of the image in a particular frame in iphone? -

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i have application in need crop image particular frame.ie cgrectmake(20,40, 280,200).then taking image , in

pickerdidfinish

i doing ` 

    uiimage *image = [info objectforkey:uiimagepickercontrolleroriginalimage];      //code crop     cgrect rect=cgrectmake(20,40,280,180);     cgimageref imageref = cgimagecreatewithimageinrect([image cgimage], rect);     uiimage *newimg = [uiimage imagewithcgimage:imageref];      cgimagerelease(imageref);     cgsize size = [newimg size];     uibutton *btn=[[uibutton alloc]initwithframe:cgrectmake(0, 0, size.width, size.height)];     nslog(@"frame = %@\n", nsstringfromcgrect(btn.frame));   imagedata =[[utility getcompresseddata:newimg]retain];           [[uiapplication sharedapplication] setnetworkactivityindicatorvisible:no];         [self dismissmodalviewcontrolleranimated:yes];

`and uploading image .but when got image uploaded server still 360*480.why so.i need have overlay view enables part of camera view user.so user can take whichever part wants.that shown only.but dont know going wrong.can me?


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