UITextPosition到NSRange
UITextPosition到NSRange
提问于 2012-07-31 10:05:33
我需要使用NSStringFromRange，但我只有一个开始和结束UITextPositions。如何将UITextPosition转换为NSRange。
NSMutableArray * wordArray = [[NSMutableArray alloc]init];
id<UITextInputTokenizer> tokenizer = tv.tokenizer;
UITextPosition *start = tv.beginningOfDocument;
while (![start isEqual:tv.endOfDocument]) {
UITextPosition *end = [tokenizer positionFromPosition:start toBoundary:UITextGranularityWord inDirection:UITextStorageDirectionForward];
NSString *word = [tv textInRange:[tv textRangeFromPosition:start toPosition:end]];
[wordArray addObject:NSStringFromRange(<#NSRange range#>)];
start = end;
}回答 4
Stack Overflow用户
回答已采纳
发布于 2012-07-31 11:40:54
试试这个：
NSInteger startOffset = [tv offsetFromPosition:tv.beginningOfDocument toPosition:start];
NSInteger endOffset = [tv offsetFromPosition:tv.beginningOfDocument toPosition:end];
NSRange offsetRange = NSMakeRange(startOffset, endOffset - startOffset);
[wordArray addObject:NSStringFromRange(offsetRange)];Stack Overflow用户
发布于 2014-01-26 04:40:56
- (NSRange)rangeFromTextRange:(UITextRange *)textRange inTextView:(UITextView*)textView {
UITextPosition* beginning = textView.beginningOfDocument;
UITextPosition* start = textRange.start;
UITextPosition* end = textRange.end;
const NSInteger location = [textView offsetFromPosition:beginning toPosition:start];
const NSInteger length = [textView offsetFromPosition:start toPosition:end];
return NSMakeRange(location, length);
}Stack Overflow用户
发布于 2017-09-04 00:28:24
Swift3版本
func angeFromTextRange(textRange:UITextRange,textView:UITextView) -> NSRange {
let location:Int = textView.offset(from: textView.beginningOfDocument, to: textRange.start)
let length:Int = textView.offset(from: textRange.start, to: textRange.end)
return NSMakeRange(location, length)
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/11732150
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