从UITextView的单词中获取单词 [英] Get word from long tap in a word of UITextView

问题描述

现在我已经在UITextView中检测到长按

Now I already detect long tap in UITextView

    - (void)viewDidLoad
    {
         [super viewDidLoad];
         UILongPressGestureRecognizer *LongPressgesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPressFrom:)];    
         [[self textview] addGestureRecognizer:LongPressgesture];
         longPressGestureRecognizer.delegate = self;
    }
    - (void) handleLongPressFrom: (UISwipeGestureRecognizer *)recognizer
    {
         CGPoint location = [recognizer locationInView:self.view];

         NSLog(@"Tap Gesture Coordinates: %.2f %.2f", location.x, location.y);
    }

现在，我该如何获取长按的单词内容，并获得该单词的矩形以准备显示PopOver？

Now, How should I do to get content of word which got long press, and get a rect of that word to prepare to show the PopOver?

推荐答案

此函数将返回UITextView中给定位置的单词。

This function will return the word at a given position in an UITextView.

+(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];

    return [_tv textInRange:wr];
}

这篇关于从UITextView的单词中获取单词的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！