How to implement search function to UITextView?

问题

I have more than 40 views with their own respective UITexView. I want to implement a search function that allows the user to search across the UITextViews. Actually, I do not even know how to implement search function for 1 UITextView. Therefore I do not know if it is possible at all.

I have searched the web and looked for it here but did not find what I looked for.

I appreciate your advice.

回答1:

This is a pretty easy (may I say obvious?) task. Just think a bit about it. What does searching in a text view mean? Well, it means getting its text and see if a particular string (the one which is searched for) is the substring of the text, and if so, where it is inside. Assuming you use a UISearchBar to hold the text to be searched for:

NSString *subs = searchBar.text;
NSString *wholeText = textView.text;

NSRange r = [wholeText rangeOfString:subs];
if (r.location == NSNotFound)
{
    // The term to be searched couldn't be found...
}
else
{
    // The string to be searched for is in the text view, r.location contains where exactly it is.
}

回答2:

You can search for text in TextView like this:

[TextView.text rangeOfString:]

There's no built in controller for searching UITextView, you have to implement this functionality by yourself with above function.

来源：https://stackoverflow.com/questions/11914282/how-to-implement-search-function-to-uitextview