CODEWITHSUNDEEP
iosobjective-cnsstringnsrange
Rakesh kumar
Rakesh kumar

Reputation: 81

How to get highlighted text range in WebView Content in iOS?

Applied this code in .js file

var selectedText = "";
function getHighlightedString()
{
  var text = document.getSelection();
  startIndex = text.anchorOffset;
  endIndex = text.focusOffset;
  selectedText = text.anchorNode.textContent.substr(startIndex,endIndex - text.anchorOffset);
  var rangeText = document.getSelection().toString();
}
function highlight() {
 if (typeof window.getSelection != "undefined") {
  var range = document.getSelection().getRangeAt(0);
  var selectionContents = range.extractContents();
  var span = document.createElement("span");
  span.appendChild(selectionContents);
  span.setAttribute("class","uiWebviewHighlight");
  span.style.backgroundColor = "rgb(237,191,245)";
  span.style.color = "orange";
  range.insertNode(span);
 }
}

And I'm using this code for highlighting the text.

NSString *filePath  = [[NSBundle mainBundle] pathForResource:@"first" ofType:@"js" inDirectory:@""];
NSData *fileData    = [NSData dataWithContentsOfFile:filePath];
NSString *jsString  = [[NSMutableString alloc] initWithData:fileData encoding:NSUTF8StringEncoding];
[webView_Detail stringByEvaluatingJavaScriptFromString:jsString];

NSString *highlightFunction = [NSString stringWithFormat:@"highlight()"];
[webView_Detail stringByEvaluatingJavaScriptFromString:highlightFunction];
highlightedString = [webView_Detail                                     stringByEvaluatingJavaScriptFromString:@"document.documentElement.outerHTML"];

I stuck for getting the text range. it i have to send to server.but i couldn't able to get selected text range. Please help me.

Upvotes: 0

Views: 895

Answers (1)

Nirav Gadhiya
Nirav Gadhiya

Reputation: 6342

Try Following 

NSString * strJS = @"window.getSelection().toString()";
NSString * strSelectedText = [self.webView stringByEvaluatingJavaScriptFromString:strJS];
NSString *plainText = [self.webView stringByEvaluatingJavaScriptFromString:@"document.body.textContent"];
NSRange * rangeOfString = [plainText rangeOfString:strSelectedText];

You can try following alternate also

NSString *plainText = [self.webView stringByEvaluatingJavaScriptFromString: @"document.body.innerText"];

If there are multiple matches found for selected text, please refer following link to find all ranges of occurrence.

Find all locations of substring in NSString (not just first)

Upvotes: 1

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