Created
May 29, 2013 14:17
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How to Synchronously get the Height of UIWebView
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| - (UIWebView*)createWebViewContent:(NSString*)content frame:(CGRect)frame | |
| { | |
| NSString * webContent = [NSString stringWithFormat:@"<html><head><meta name = \"viewport\" content = \"initial-scale = 1.0, user-scalable = no\"><style type='text/css'> body {color:black; margin:0 0 0 7pt; font-family: %@ !important; font-size:13; background-color: transparent;} .label{color:red} </style></head><body face=\"Bookman Old Style, Book Antiqua, Garamond\" size=\"5\"><div>%@</div></body></html>",WEBVIEW_FONT,content]; | |
| UIWebView *webView = [[UIWebView alloc] initWithFrame:frame]; | |
| webView.delegate = self; | |
| webView.tag = 444; | |
| webView.backgroundColor = [UIColor clearColor]; | |
| [webView loadHTMLString:webContent baseURL:nil]; | |
| NSLog(@"before CFRunLoop"); | |
| CFRunLoopRunInMode((CFStringRef)NSDefaultRunLoopMode, 1, NO); | |
| NSLog(@"after CFRunLoop"); | |
| [self waitHtmlLoadingTime:webView]; | |
| return webView; | |
| } | |
| - (void) waitHtmlLoadingTime:(UIWebView*)webView | |
| { | |
| float webViewHeight = 30; | |
| webViewHeight = [[webView stringByEvaluatingJavaScriptFromString: @"document.body.offsetHeight"] floatValue]; | |
| NSLog(@"webViewHeight - %f",webViewHeight); | |
| CGRect size = webView.frame; | |
| size.size.height = webViewHeight; | |
| webView.frame = size; | |
| } | |
| -(void) stopRunLoop | |
| { | |
| CFRunLoopRef runLoop = [[NSRunLoop currentRunLoop] getCFRunLoop]; | |
| CFRunLoopStop(runLoop); | |
| } | |
| -(void) webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error | |
| { | |
| NSLog(@"before didFailLoadWithError"); | |
| [self performSelector:@selector(stopRunLoop) withObject:nil afterDelay:.01]; | |
| } | |
| -(void) webViewDidFinishLoad:(UIWebView *)webView | |
| { | |
| NSLog(@"before webViewDidFinishLoad"); | |
| [self performSelector:@selector(stopRunLoop) withObject:nil afterDelay:.01]; | |
| } |
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get the idea from > https://github.com/gavrix/UISynchedWebView-demo