iOS: 計算 UIWebView 的內容高度

時間 2019-11-11

標籤 ios 計算 uiwebview 內容高度欄目 iOS 简体版

原文原文鏈接

先是 html 文件內容web

// index.html
<html> <body> <div id="content" contenteditable="false" style="font-family: Helvetica"> <a href="id:abc" style="text-decoration:none; color:green"> John </a> : This is out Rich Text Editing View </div> </body> </html>

加載 html 文件post

- (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib.  NSBundle *mainBundle = [NSBundle mainBundle]; NSURL *indexFileURL = [mainBundle URLForResource:@"index" withExtension:@"html"]; [self.webView loadRequest:[NSURLRequest requestWithURL:indexFileURL]]; }

計算 webView 顯示內容後實際高度this

兩種方法，方法1能夠獲得內容的實際高度，方法2獲得了將內容顯示完整後的 webView 的尺寸（包含 UIEdgeInsets）lua

- (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; }