Question

我正在尝试在UITextView中找到Tapped字符串。我试过了UIDataDetectorTypeLink。但它没有用。我也不确定是否有可能检测到String。我在自定义UITextView中使用UITableViewCell。从那我我试图检测轻拍的字符串。以下是我试过的示例代码。任何人都可以帮我找到我做错了什么，我怎么能解决这个问题？即使不可能，我该如何解决这个问题呢？

NSMutableArray *sampleArray = [[NSMutableArray alloc]init];
NSMutableString *mutableString = [[NSMutableString alloc]init];
NSMutableAttributedString * string;
sampleArray = [[postArray valueForKey:@"hash_tags"] objectAtIndex:indexPath.row];
for(NSString *sampleString in sampleArray){
    if (mutableString.length == 0) {
        [mutableString appendString:sampleString];
    }else{
        [mutableString appendString:[NSString stringWithFormat:@", %@",sampleString]];
    }
    string = [[NSMutableAttributedString alloc] initWithString:[NSString stringWithFormat:@"%@",mutableString]];
    //        [string addAttribute:NSForegroundColorAttributeName value:[UIColor blueColor] range:NSMakeRange(0,[string length])];
}
NSDictionary *linkAttributes = @{NSForegroundColorAttributeName: [UIColor colorWithRed:5.0f/255.0f green:107.0f/255.0f blue:153.0f/255.0f alpha:1.0f], NSUnderlineColorAttributeName: [UIColor greenColor],NSUnderlineStyleAttributeName: @(NSUnderlinePatternSolid)};
[string addAttribute:NSLinkAttributeName
               value:string
               range:NSMakeRange(0, [string length])];//[[string string] rangeOfString:sampleString]];
[cell.tagsTextView setAttributedText:string];
[cell.tagsTextView setDelegate:self];
[cell.tagsTextView setUserInteractionEnabled:YES];
cell.tagsTextView.scrollEnabled = NO;
cell.tagsTextView.editable = NO;
cell.tagsTextView.dataDetectorTypes = UIDataDetectorTypeLink;
//        cell.tagsTextView.textContainer.lineFragmentPadding = 0;
//        cell.tagsTextView.textContainerInset = UIEdgeInsetsMake(0, 0, 0, 0);
[cell.tagsTextView setLinkTextAttributes:linkAttributes];

UITextView Delegates

-(BOOL)textView:(UITextView *)textView shouldInteractWithURL:(NSURL *)URL inRange:(NSRange)characterRange {
    NSLog(@"url %@",URL);
    if ([[URL scheme] isEqualToString:@"username"]) {
        NSString *username = [URL host];
        // do something with this username
        // ...
        return NO;
    }
    return YES; // let the system open this URL
}

提前致谢

Answer 1

将 UITapGestureRecognizer 添加到 UITextView ，下面是 UITapGestureRecognizer选择器方法。< / p>

- (void) tapResponse:(UITapGestureRecognizer *)recognizer{

    UITextView *textView =  (UITextView *)recognizer.view;
    CGPoint location = [recognizer locationInView:textView];
    NSLog(@"Tap Gesture Coordinates: %.2f %.2f -- %@", location.x, location.y,textView.text);

    CGPoint position = CGPointMake(location.x, location.y);
    //get location in text from textposition at point
    UITextPosition *tapPosition = [textView closestPositionToPoint:position];

    //fetch the word at this position (or nil, if not available)
    UITextRange *textRange = [textView.tokenizer rangeEnclosingPosition:tapPosition withGranularity:UITextGranularityWord inDirection:UITextLayoutDirectionRight];
    NSString *tappedSentence = [textView textInRange:textRange];//[self lineAtPosition:CGPointMake(location.x, location.y)];
    NSLog(@"selected :%@ -- %@",tappedSentence,tapPosition);
}

Answer 2

感谢@Grey_Code，此代码的Swift 4版本为：

class Tender(Procurement):
    pass

class OfferRequest(Procurement):
    tender = models.ForeignKey(Tender)

    @classmethod
    def from_tender(cls, tender):
        instance = cls()
        instance.tender = tender
        for field in Procurement._meta.fields:
            if field.auto_created:
                continue
            setattr(
                instance,
                field.name,
                getattr(tender, field.name, None)
            )
        instance.save()
        return instance

tender = Tender.objects.first()
offer_request = OfferRequest.from_tender(tender)

在UITextView中检测Tapped字符串

2 个答案: