blocks|key|456894|text|我通常使用以下方法来设置UIWebview+frame的内容大小：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|456895|-+(void)webViewDidStartLoad:(UIWebView+*)webView+{
++++CGRect+frame+=+webView.frame;
++++frame.size.height+=+5.0f;
++++webView.frame+=+frame;
}

-+(void)webViewDidFinishLoad:(UIWebView+*)webView+{
++++CGSize+mWebViewTextSize+=+[webView+sizeThatFits:CGSizeMake(1.0f,+1.0f)];+//+Pass+about+any+size
++++CGRect+mWebViewFrame+=+webView.frame;
++++mWebViewFrame.size.height+=+mWebViewTextSize.height;
++++webView.frame+=+mWebViewFrame;

++++//Disable+bouncing+in+webview
++++for+(id+subview+in+webView.subviews)+{
++++++++if+([[subview+class]+isSubclassOfClass:+[UIScrollView+class]])+{
++++++++++++[subview+setBounces:NO];
++++++++}
++++}
}|code-block|syntax|javascript|456896|当WebView加载完它的内容时，它们会被自动调用(如果你将webView的委托设置为这个类)。|456897|entityMap^0|C|9|0|0|1|7|U|7|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|X|8|@]|D|@]|E|$]]]|N|$]]

I usually use these methods, to set <code>UIWebview</code> frame as it's content size:

<pre><code>- (void)webViewDidStartLoad:(UIWebView *)webView {
 CGRect frame = webView.frame;
 frame.size.height = 5.0f;
 webView.frame = frame;
}

- (void)webViewDidFinishLoad:(UIWebView *)webView {
 CGSize mWebViewTextSize = [webView sizeThatFits:CGSizeMake(1.0f, 1.0f)]; // Pass about any size
 CGRect mWebViewFrame = webView.frame;
 mWebViewFrame.size.height = mWebViewTextSize.height;
 webView.frame = mWebViewFrame;

 //Disable bouncing in webview
 for (id subview in webView.subviews) {
 if ([[subview class] isSubclassOfClass: [UIScrollView class]]) {
 [subview setBounces:NO];
 }
 }
}
</code></pre>

They are automatically called (if you set <code>webView</code>'s delegate to this class), when <code>WebView</code> has finished loading it's content.

blocks|key|239881|text|-+(void)viewDidLoad
{
++++[super+viewDidLoad];
++++webview.delegate+=+self;
++++[webview+loadHTMLString:@"<div+id='foo'+style='background:+red'>The+quick+brown+fox+jumped+over+the+lazy+dog.</div>"+baseURL:nil];
}

-+(void)webViewDidFinishLoad:(UIWebView+*)webView
{
++++NSString+*output+=+[webview+stringByEvaluatingJavaScriptFromString:@"document.getElementById(\"foo\").offsetHeight;"];
++++NSLog(@"height:+%25@",+output);
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|239882|另请参阅How+to+determine+UIWebView+height+based+on+content,+within+a+variable+height+UITableView?|unstyled|offset|length|239883|Calculate+UIWebView+height+depending+on+its+content|239884|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/745160/how-to-determine-uiwebview-height-based-on-content-within-a-variable-height-uit|1|https://stackoverflow.com/questions/10715524/calculate-uiwebview-height-depending-on-its-content^0|0|4|2H|0|0|0|1F|1|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|V|8|@]|9|@$G|W|H|X|1|Y]]|A|$]]|$1|I|3|J|5|F|7|Z|8|@]|9|@$G|10|H|11|1|12]]|A|$]]|$1|K|3|-4|5|F|7|13|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]|S|$5|N|O|P|A|$Q|T]]]]

<pre><code>- (void)viewDidLoad
{
 [super viewDidLoad];
 webview.delegate = self;
 [webview loadHTMLString:@"&lt;div id='foo' style='background: red'&gt;The quick brown fox jumped over the lazy dog.&lt;/div&gt;" baseURL:nil];
}

- (void)webViewDidFinishLoad:(UIWebView *)webView
{
 NSString *output = [webview stringByEvaluatingJavaScriptFromString:@"document.getElementById(\"foo\").offsetHeight;"];
 NSLog(@"height: %@", output);
}
</code></pre>

see also <a href="https://stackoverflow.com/questions/745160/how-to-determine-uiwebview-height-based-on-content-within-a-variable-height-uit">How to determine UIWebView height based on content, within a variable height UITableView?</a>

<a href="https://stackoverflow.com/questions/10715524/calculate-uiwebview-height-depending-on-its-content">Calculate UIWebView height depending on its content</a>

blocks|key|239889|text|试试这段代码|type|unstyled|depth|inlineStyleRanges|entityRanges|data|239890|-+(void)webViewDidFinishLoad:(UIWebView+*)webView
{+++++
++++height=+[[self.webView+stringByEvaluatingJavaScriptFromString:@"document.body.scrollHeight"]+floatValue];
}|code-block|syntax|javascript|239891|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try this code 

<pre><code>- (void)webViewDidFinishLoad:(UIWebView *)webView
{ 
 height= [[self.webView stringByEvaluatingJavaScriptFromString:@"document.body.scrollHeight"] floatValue];
}
</code></pre>

blocks|key|239907|text|每个web视图都有一个内置的UIScrollView，所以我会尝试等待页面加载，然后点击滚动视图的contentSize属性来获取页面的高度。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|239908|-+(void)webViewDidFinishLoad:(UIWebView+*)webView
{
++++CGFloat+height+=+webView.scrollView.contentSize.height;
}|code-block|syntax|javascript|239909|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Well, every web view has a UIScrollView built into it, so I would try waiting for the page to load and then tapping into the scroll view's contentSize property to get the height of the page.

<pre><code>- (void)webViewDidFinishLoad:(UIWebView *)webView
{
 CGFloat height = webView.scrollView.contentSize.height;
}
</code></pre>

blocks|key|456948|text|如果你在tableviewcell中有webview，在heightForRowAtIndexPath中将单元格的高度设置为NSAttributedString大小的高度，如下所示。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|456949|-(CGFloat)tableView:(UITableView+*)tableView+heightForRowAtIndexPath:(NSIndexPath+*)indexPath{


++++NSAttributedString+*attributedText+=+[NSString++getHTMLAttributedString:@"HTML+Content"];
++++CGSize+size+=+CGSizeMake(300,+CGFLOAT_MAX);
++++CGRect+paragraphRect+=+++++[attributedText+boundingRectWithSize:size
+++++++++++++++++++++++++++++++++options:(NSStringDrawingUsesLineFragmentOrigin)
+++++++++++++++++++++++++++++++++context:nil];
++++return+paragraphRect.size.height;
}

%2B(NSAttributedString+*)+getHTMLAttributedString:(NSString+*)+string{
++++NSError+*errorFees=nil;
++++NSString+*sourceFees+=+[NSString+stringWithFormat:
++++++++++++++++++++++++++++@"<span+style=\"font-family:+'Roboto-Light';font-size:+14px\">%25@",string];
++++NSMutableAttributedString*+strFees+=+[[NSMutableAttributedString+alloc]+initWithData:[sourceFees+dataUsingEncoding:NSUTF8StringEncoding]
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++options:@{NSDocumentTypeDocumentAttribute:+NSHTMLTextDocumentType,
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++NSCharacterEncodingDocumentAttribute:+[NSNumber+numberWithInt:NSUTF8StringEncoding]}
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++documentAttributes:nil+error:&errorFees];
++++return+strFees;

}|code-block|syntax|javascript|456950|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If you have webview in tableviewcell, in heightForRowAtIndexPath set the height of cell to height of NSAttributedString size as following.

<pre><code>-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{


 NSAttributedString *attributedText = [NSString getHTMLAttributedString:@"HTML Content"];
 CGSize size = CGSizeMake(300, CGFLOAT_MAX);
 CGRect paragraphRect = [attributedText boundingRectWithSize:size
 options:(NSStringDrawingUsesLineFragmentOrigin)
 context:nil];
 return paragraphRect.size.height;
}

+(NSAttributedString *) getHTMLAttributedString:(NSString *) string{
 NSError *errorFees=nil;
 NSString *sourceFees = [NSString stringWithFormat:
 @"&lt;span style=\"font-family: 'Roboto-Light';font-size: 14px\"&gt;%@&lt;/span&gt;",string];
 NSMutableAttributedString* strFees = [[NSMutableAttributedString alloc] initWithData:[sourceFees dataUsingEncoding:NSUTF8StringEncoding]
 options:@{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType,
 NSCharacterEncodingDocumentAttribute: [NSNumber numberWithInt:NSUTF8StringEncoding]}
 documentAttributes:nil error:&amp;errorFees];
 return strFees;

}
</code></pre>

I want to set height of UIWebview based on HTML content. I am getting the size of a string, but not getting the actual size due to paragraph, bold, different font size, etc.

How to set height of UIWebView based on html content?

我想设置基于超文本标记语言内容的UIWebview高度。我得到了字符串的大小，但由于段落、粗体、不同的字体大小等原因，我没有得到实际的大小。

问如何根据html内容设置UIWebView的高度？
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何根据html内容设置UIWebView的高度？EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何根据html内容设置UIWebView的高度？
EN