如何突出顯示字符串的NSRange

Question

我使用此代碼在TextView中點擊時獲取字符串。 我聽懂了. 但我需要在iOS的復制粘貼功能中突出顯示選中的敲擊字符串。

- (void)textViewDidBeginEditing:(UITextView *)textView
{
    [NSTimer scheduledTimerWithTimeInterval:0.001 target:maintextview   selector:@selector(resignFirstResponder) userInfo:nil repeats:NO];
}

- (void)textViewDidEndEditing:(UITextView *)textView
{
    NSRange selectedRange = [textView selectedRange];
    NSString *backString = [maintextview.text substringToIndex:selectedRange.location];
    NSRange backRange = [backString rangeOfString:@"." options:NSBackwardsSearch];
    NSString *forwardString  = [maintextview.text substringFromIndex:backRange.location];
    NSLog(@"%@",[[forwardString componentsSeparatedByString:@"."] objectAtIndex:1]);
 }

當我點擊它時，如何用某些顏色突出顯示forwardString ？

Answer 1

您不能只為forwardString生成NSRange（通過使用substringFromIndex而不是substringToIndex）並調用：

[textView setSelectedRange];

？