Question

此代码适用于其他任何人，只有当我尝试在放置在Cell中的UITextView上使用它时，我似乎无法得到属于tap的属性词。

UITapGesturRecognizer添加在单元格本身上。

这是创建属性文本的代码：

   //Color:
+ (NSAttributedString *)attributedMessageFromMessage:(NSString *)message {
    NSArray* messageWords = [message componentsSeparatedByString: @" "];
    NSMutableAttributedString *attributedMessage = [[NSMutableAttributedString alloc] initWithString:@""];

    for (NSString *word in messageWords) {
        NSDictionary * attributes;
        if ([word isEqualToString:@""] || !word) {
            return attributedMessage;
        }
        if([word characterAtIndex:0] == '@'){
            attributes = @{NSForegroundColorAttributeName:[UIColor colorWithRed:72.0/255.0
                                                                          green:192.0/255.0
                                                                           blue:89.0/255.0
                                                                          alpha:1.0],
                           wordType: userNameKey,
                           userNameKey:[word substringFromIndex:1],
                            NSFontAttributeName:[UIFont fontWithName:@"HelveticaNeue-Light" size:18.0f]};

        } else if([word characterAtIndex:0] == '#'){
            attributes = @{NSForegroundColorAttributeName:[UIColor colorWithRed:16.0/255.0
                                                                          green:96.0/255.0
                                                                           blue:184.0/255.0
                                                                          alpha:1.0],
                           wordType: hashTagKey,
                           hashTagKey:[word substringFromIndex:1],
                            NSFontAttributeName:[UIFont fontWithName:@"HelveticaNeue-Light" size:18.0f]};

        } else {
            attributes = @{
                           NSForegroundColorAttributeName:[UIColor colorWithRed:145.0/255.0 green:145.0/255.0  blue:145.0/255.0  alpha:1], wordType: normalKey,
                           NSFontAttributeName:[UIFont fontWithName:@"HelveticaNeue-Light" size:18.0f]};


        }
        NSAttributedString * subString = [[NSAttributedString alloc]
                                          initWithString:[NSString stringWithFormat:@"%@ ",word]
                                          attributes:attributes];


        [attributedMessage appendAttributedString:subString];

    }
    return attributedMessage;
}

这是在点击时调用的代码：

//Tap gestureRecornizer:
+ (WordObject *)messageTapped:(UITapGestureRecognizer *)recognizer {

    UITextView *textView = (UITextView *)recognizer.view;

    NSLayoutManager *layoutManager = textView.layoutManager;
    CGPoint location = [recognizer locationInView:textView];

    location.x -= textView.textContainerInset.left;
    location.y -= textView.textContainerInset.top;

    NSUInteger characterIndex;
    characterIndex = [layoutManager characterIndexForPoint:location
                                           inTextContainer:textView.textContainer
                  fractionOfDistanceBetweenInsertionPoints:NULL];

    if (characterIndex < textView.textStorage.length) {

        NSRange range;
        id wordTypeToFind = [textView.attributedText attribute:@"WordType"
                                                 atIndex:characterIndex
                                          effectiveRange:&range];


        if([wordTypeToFind isEqualToString:userNameKey]){
            NSString *userName = [textView.attributedText attribute:userNameKey
                                                            atIndex:characterIndex
                                                     effectiveRange:&range];

            //Returning the word that was tappet:

            WordObject *wordObject = [[WordObject alloc]initWithWord:userName andType:NAME andWhasThereAWordClick:YES];
            return wordObject;


        } else if([wordType isEqualToString:hashTagKey]){
            // TODO: Segue to hashtag controller once it is in place.
            NSString *userName = [textView.attributedText attribute:hashTagKey
                                                            atIndex:characterIndex
                                                     effectiveRange:&range];
            // [self openViewControllerForUserName:userName];

            WordObject *wordObject = [[WordObject alloc]initWithWord:userName andType:HASHTAG andWhasThereAWordClick:YES];
            return wordObject;
        }
    }
    return nil;
}

id＆＃34; wordTypeToFind＆＃34;刚刚回来了。

我想也许是因为UITextView放在一个单元格上，我需要考虑一些以太值？

修改

我正在检查这个问题，这很奇怪。我试图在点击后插入然后在线恢复归属文本，并且我没有了！这是怎么回事？并且，当属性字符串附加到不在Cell上的UITextView时，会发生这种情况。

//This is called on tap:
    NSAttributedString *final = [TextHandlerHelper attributedTextViewString:stringSeperated];
//Final has a value of @"bla bla @bla"
    [self.labelHashTagsBottum setAttributedText:final];
    //Text value is nil!
    NSString *text = [self.labelHashTagsBottum.attributedText string];

Answer 1

由于一些奇怪的原因，归因于文本，无论何时在单元格Outlet中使用它，它都会自行释放（即使它是一个字符串引用）。

我不知道这种情况到底发生了什么，但仍然可以看到属性文本，但值：

cell.textView.attributedText

将是nill。

让我们说，你有像Instagram这样的UITable，在单元格上有可点击的HashTag。属性文本的值每次都会返回nill。

解决方案

我发现解决这个问题的唯一方法是将UITextView作为子视图添加到Cells ContentView。

像这样：

[self.textView removeFromSuperview];
    self.textView = nil;

    self.textView = [[UITextView alloc]initWithFrame:CGRectMake(43, 310, 224, 51)];
    [self.contentView addSubview:self.textView];
    self.textView.editable = NO;
    [self.textView setBackgroundColor:[UIColor clearColor]];
    self.textView.scrollEnabled = NO;

检测单元格中属性文本的单击

1 个答案: