webview内容适应

解决方法：

方法1可以得到内容的实际高度，方法2得到了将内容显示完整后的 webView 的尺寸（包含 UIEdgeInsets）
- (void)webViewDidFinishLoad:(UIWebView *)wb
{
    //方法1
    CGFloat documentWidth = [[wb stringByEvaluatingJavaScriptFromString:@"document.getElementById('content').offsetWidth"] floatValue];
    CGFloat documentHeight = [[wb stringByEvaluatingJavaScriptFromString:@"document.getElementById(\"content\").offsetHeight;"] floatValue];
    NSLog(@"documentSize = {%f, %f}", documentWidth, documentHeight);

    //方法2
    CGRect frame = wb.frame;
    frame.size.width = 768;
    frame.size.height = 1;
//    wb.scrollView.scrollEnabled = NO;
    wb.frame = frame;

    frame.size.height = wb.scrollView.contentSize.height;

    NSLog(@"frame = %@", [NSValue valueWithCGRect:frame]);
    wb.frame = frame;
}

//其他几种方案
//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

}



}

}

}