ios - How to create/save high resolution image in Objective-C? -


i have following problem - have 2 high resolution images 300dpi. want create new image 2 high-res images. using following code:

i generate new image this:

    nsstring *filename = @"imageone.jpeg";     nsarray *path = nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, yes);     nsstring *documentdirectory = [path objectatindex:0];     nsstring *imgpathwithfilename = [documentdirectory stringbyappendingpathcomponent:filename];     // [uiimagepngrepresentation(finalimage) writetofile:imgpathwithfilename atomically:yes];     [uiimagejpegrepresentation(imageone, 1) writetofile:imgpathwithfilename atomically:yes];     nslog (@"success!");

the problem new image 72dpi. why that, when images compose new one, 300dpi each? how create image 300dpi, ideas?


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