我正在使用以下代码来检测UITextView中的单词。这工作正常,但我想检测一些特殊字符,如?
。使用?
时,UITextGranularityWord
不会显示为单词的一部分,而且在使用UITextGranularityCharacter
时似乎无法显示它。
如何检测?
等单个特殊字符的点击?
-(NSString*)getWordAtPosition:(CGPoint)pos inTextView:(UITextView*)_tv
{
//eliminate scroll offset
pos.y += _tv.contentOffset.y;
//get location in text from textposition at point
UITextPosition *tapPos = [_tv closestPositionToPoint:pos];
//fetch the word at this position (or nil, if not available)
UITextRange * wr = [_tv.tokenizer rangeEnclosingPosition:tapPos withGranularity:UITextGranularityWord inDirection:UITextLayoutDirectionRight];
if ([_tv textInRange:wr].length == 0) {//i.e. it's not a word
NSLog(@"is 0 length, check for characters (e.g. ?)");
UITextRange *ch = [_tv.tokenizer rangeEnclosingPosition:tapPos withGranularity:UITextGranularityCharacter inDirection:UITextLayoutDirectionRight];
NSLog(@"ch range: %@ ch text: %@",ch, [_tv textInRange:ch] ); // logs: ch range: (null) ch text:
if ([[_tv textInRange:ch] isEqualToString:@"?"]) {
return [_tv textInRange:ch];
}
}
return [_tv textInRange:wr];
}
答案 0 :(得分:3)
此代码在iOS 6上适用于我:
- (void)tappedTextView:(UITapGestureRecognizer *)recognizer {
UITextView *textView = (UITextView *)recognizer.view;
CGPoint location = [recognizer locationInView:textView];
UITextPosition *tapPosition = [textView closestPositionToPoint:location];
UITextRange *textRange = [textView.tokenizer rangeEnclosingPosition:tapPosition withGranularity:UITextGranularityCharacter inDirection:UITextLayoutDirectionRight];
NSString *character = [textView textInRange:textRange];
NSLog(@"%@", character);
}