ios webview自适应实际内容高度4种方法

转自：http://www.2cto.com/kf/201508/435091.html

//第一种方法

- (void)webViewDidFinishLoad:(UIWebView *)webView

{

CGFloat webViewHeight=[webView.scrollView contentSize].height;

 

CGRect newFrame = webView.frame;

newFrame.size.height = webViewHeight;

webView.frame = newFrame;

_webTablewView.contentSize = CGSizeMake(320, newFrame.size.height + 64 + KWIDTH - 100);

 

}

//2.执行js语句 直接获取html文档的dom高度
- (void)webViewDidFinishLoad:(UIWebView *)webView{

CGFloatwebViewHeight =[[webViewstringByEvaluatingJavaScriptFromString:@document.body.offsetHeight]floatValue];

// CGFloat webViewHeight= [[webViewstringByEvaluatingJavaScriptFromString:@document.body.scrollHeight]floatValue];

CGRectnewFrame = webView.frame;

newFrame.size.height= webViewHeight;

webView.frame= newFrame;

}

//方法3.先将UIWebView的高度设为最小，然后再使用sizeThatFits就会返回刚好合适的大小

-(void)webViewDidFinishLoad:(UIWebView*)webVie{

CGSize actualSize = [webView sizeThatFits:CGSizeZero];

CGRect newFrame = webView.frame;

newFrame.size.height = actualSize.height;

webView.frame = newFrame;

}

//方法4.遍历webview子视图 获取UIWebDocumentView高度即实际高度

 

-(void)webViewDidFinishLoad:(UIWebView *)webView{

CGFloat webViewHeight = 0.0f;

 

if([webView.subviews count] > 0)

{

UIView *scrollerView = webView.subviews[0];

 

if([scrollerView.subviews count] >

0)

{

UIView *webDocView = scrollerView.subviews.lastObject;

if ([webDocView isKindOfClass:[NSClassFromString(@UIWebDocumentView)class]])

{

webViewHeight = webDocView.frame.size.height;//获取文档的高度

 

webView.frame=webDocView.frame;

 

//更新UIWebView 的高度

}

 

}

}

}