ios - How to wait until webViewDidFinishLoad is called? -

i'm creating ios app.

i separated pdf has multi page each pages,

and create uiwebviews show each pages.

the code this.

for( int = 0; < _pagenumbers; i++) {     _webview = [[uiwebview alloc]init];     _webview.delegate = self;     _webview.frame = imageviewframe;     _webview.scalespagetofit = yes;     _webview.autoresizingmask =     uiviewautoresizingflexibleleftmargin  |     uiviewautoresizingflexiblewidth       |     uiviewautoresizingflexiblerightmargin |     uiviewautoresizingflexibletopmargin   |     uiviewautoresizingflexibleheight      |     uiviewautoresizingflexiblebottommargin;     [self setimageatindex:i toscrollview:imagescrollview]; }  - (void)setimageatindex:(nsinteger)index toscrollview:(imagescrollview*)scrollview {     uiwebview   *thewebview = (scrollview.subviews)[0];     if (index < 0 || [webviews count] <= index) {         thewebview = nil;         return;     }      dispatch_queue_t queueloadpdf = dispatch_get_global_queue(dispatch_queue_priority_default, 0);     dispatch_sync(queueloadpdf, ^{         nsstring    *document = [[[[nsstring alloc]initwithstring:_documwntpath]stringbyappendingstring:@"/"]stringbyappendingformat:@"page%zd.pdf",(index + 1) ];          nsurl   *url = [nsurl fileurlwithpath:document];         nsstring *urlstring = [url absolutestring];         nsstring *encodedstring=[urlstring stringbyaddingpercentescapesusingencoding:nsutf8stringencoding];         nsurl *weburl = [nsurl urlwithstring:encodedstring];         nsurlrequest    *req = [nsurlrequest requestwithurl:weburl];         [thewebview loadrequest:req];     }); } 

the pdf pages big. after calling loadrequest, program go loop , creates new uiwebview.

i want wait until webviewdidfinishload called before returning loop.

is there solutions?

thank helps.

@masarukitajima it's kinda hard see trying do. initial thoughts same @chinttu -maddy- ramani's when looked @ code again, see more problem rough assumptions. throw couple of questions , should think design again answer.

somehow code doesn't make sense me. see [webviews count] in code. have multiple webviews in scroll view? see _webview think it's member variable , initiating in for-loop? do?? should able answer first. loading 1 webview not because didn't know how load next webview in webviewdidfinishload because have 1 webview??

second, think want load 1 webview @ time , design doesn't make sense me either. should load next webview when imagescrollview scrolled down next webview. idea pretty same how load next data in table view when last cell displayed.