iphone - Async image in button issue -


i have piece of code in function. , looping creating async image inside button. when run it, button not show async image.please tell me what's wrong code. when print nslog url, going , show of image url.

            // add button             uibutton *btn = [uibutton buttonwithtype:uibuttontypecustom];             [btn setframe:cgrectmake(topleft.x,topleft.y,width,height)];              //asyncronous image             nsmutablestring *imageurl;              if ([[[type objectatindex:btnnumber] objectforkey:@"last_content_image"] isequaltostring:@""] || [[type objectatindex:btnnumber] objectforkey:@"last_content_image"] == nil) {                 imageurl = [nsmutablestring stringwithformat:@"bank_images/actual/"];             }else{                 imageurl = [[type objectatindex:btnnumber] objectforkey:@"last_content_image"];             }              nsurl *url1 = [nsurl urlwithstring:imageurl];             nslog(@"url gbr : %@", url1);              nsarray  *paths = nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, yes);             nsstring  *documentsdirectory = [paths objectatindex:0];             nsstring *stringsub = [imageurl substringwithrange:nsmakerange (imageurl.length-9, 9)];             nsstring *path = [nsstring stringwithformat:@"%@/%u_%@", documentsdirectory,[globalvariable sharedinstance].indexcategoryglobal,stringsub];              if ([[nsfilemanager defaultmanager] fileexistsatpath:path])             {                 nsdata *img = [nsdata datawithcontentsoffile:path];                 uiimage *imageexist = [uiimage imagewithdata:img];                 image = imageexist;                 [btn setimage:image forstate:uicontrolstatenormal];             }else{                 dispatch_queue_t queue = dispatch_get_global_queue(dispatch_queue_priority_high,  0);                 dispatch_async(queue, ^{                     //this load lazily                     nsdata   *data1 = [nsdata datawithcontentsofurl:url1];                      dispatch_sync(dispatch_get_main_queue(), ^{                         image = [uiimage imagewithdata:data1];                         [btn setimage:image forstate:uicontrolstatenormal];                          if ([stringsub isequaltostring:@"s/actual/"]){                             image = [uiimage imagenamed:@"default_thumb.png"];                             [btn setimage:image forstate:uicontrolstatenormal];                         }                          [[nsfilemanager defaultmanager] createfileatpath:path                                                                 contents:data                                                               attributes:nil];                     });                 });             }             [btn settag:btnnumber];

looks create nsurl object in wrong way apple documentation says that

urlwithstring: creates , returns nsurl object initialized provided string.

  • (id)urlwithstring:(nsstring *)urlstring parameters urlstring string initialize nsurl object. must url conforms rfc 2396. method parses urlstring according rfcs 1738 , 1808. (to create nsurl objects file system paths, use fileurlwithpath:isdirectory: instead.)

so, looks should use fileurlwithpath:isdirectory:


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