How to get coordinates (CGRect) for the selected text in UIWebView?
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25-01-2021 - |
Question
I have simple UIWebView with loaded html. I want to show the PopoverView pointed to the selected text. I can get the menuFrame of the UIMenuController and use its rect, but the result isn't as accurate at the corners of the screen as I need. I can calculate the screen size and get menuFrame rect and then I can suppose where the selection may be found, but I want exactly know where is the selected text. Is it generally possible?
Solution
You can use the javascript function getBoundingClientRect() on the range object of the selected text. This is how I do it:
function getRectForSelectedText() {
var selection = window.getSelection();
var range = selection.getRangeAt(0);
var rect = range.getBoundingClientRect();
return "{{" + rect.left + "," + rect.top + "}, {" + rect.width + "," + rect.height + "}}";
}
and in a category on UIWebView, you could use it like such:
- (CGRect)rectForSelectedText{
CGRect selectedTextFrame = CGRectFromString([self stringByEvaluatingJavaScriptFromString:@"getRectForSelectedText()"]);
return selectedTextFrame;
}
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