iOS Webview自适应实际内容高度的4种方法详解

Z时代
2024-01-10
分类：综合

//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
}
}
}
}