iOS Webview自适应实际内容高度的4种方法详解

//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
}
}
}
}

以上所述是小编给大家介绍的ios webview自适应实际内容高度的4种方法详解，希望对大家有所帮助