objective c - Where to save the file in an application iPhon / iphone? -


i've make web app lot of image , safaris memory can't open of images. build application stores images in ipad. images can change dynamically , don't know can save it. rest of code works withe file put image.

notice : in ipad simulator works normally, in ipad have permission problem.

my code 

            uiimage *image = [[uiimage alloc] initwithdata:[nsdata datawithcontentsofurl:[nsurl urlwithstring: [nsstring stringwithformat:@"http://link_of_my_image", [splitlink objectatindex: 1],[splitlink objectatindex: 3] ] ]]];          nsdata *data1 = [nsdata datawithdata:uiimagepngrepresentation(image)];          bool test10 = [data1 writetofile:[nsstring stringwithformat: @"%@/%@/folder/%@",linkslidesfile, [splitlink objectatindex: 1],[splitlink objectatindex: 3]] atomically:yes];          nslog(@"creat image --------------------- %@ %i",               [nsstring stringwithformat: @"%@/%@/folder/%@",[splitlink objectatindex: 0], [splitlink objectatindex: 1],[splitlink objectatindex: 3]], test10);

log simulator :

creat image --------------------- link_of_image_ipad 1

log ipad :

creat image --------------------- link_of_image_ipad 0

can me please?

you able write documents directory; add method class in order path:

+ (nsstring *) applicationdocumentsdirectory  {         nsarray *paths = nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, yes);     nsstring *basepath = ([paths count] > 0) ? [paths objectatindex:0] : nil;     return basepath; }

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