问题
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?
回答1:
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;
}
来源:https://stackoverflow.com/questions/7514648/how-to-get-coordinates-cgrect-for-the-selected-text-in-uiwebview