使用NSAttributedString爲UILabel設置突出顯示的文本顏色。

我在tableview單元格上使用了一個標籤。該單元格已被分配一個屬性字符串，但問題是，在選擇時，單元格文本不會因屬性字符串變成白色。使用NSAttributedString爲UILabel設置突出顯示的文本顏色。

有什麼辦法解決它..？

任何幫助表示讚賞。

這是看我的代碼。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    static NSString *CellIdentifier = @"Cell"; 

    LHSearchViewCell *cell = [LHSearchViewCell cellForTableView:tableView fromNib:_cellNib]; 

    cell.selectionStyle = UITableViewCellSelectionStyleGray; 

    cell.headerLabel.textColor = [UIColor darkGrayColor]; 
    cell.headerLabel.highlightedTextColor = [UIColor whiteColor]; 
    cell.headerLabel.font = [UIFont systemFontOfSize:14]; 

    cell.subLabel.font = [UIFont systemFontOfSize:12]; 
    cell.subLabel.textColor = [UIColor darkGrayColor]; 
    cell.subLabel.numberOfLines = 2; 
    switch (indexPath.section) { 
     case 0: 
     { 
      UIFont *font = [UIFont systemFontOfSize:14.0]; 
      NSDictionary *firstAttributes = [NSDictionary dictionaryWithObjectsAndKeys:font,NSFontAttributeName,[UIColor darkGrayColor],NSForegroundColorAttributeName,nil]; 
      UIFont *secondFont = [UIFont systemFontOfSize:10.0]; 
      NSDictionary *secondAttributes = [NSDictionary dictionaryWithObjectsAndKeys:secondFont,NSFontAttributeName,[UIColor lightGrayColor],NSForegroundColorAttributeName,nil]; 
      NSString* completeString = [NSString stringWithFormat:@"%@ | %@",[_libraryPdfArray objectAtIndex:indexPath.row],[_libraryPdfDateArray objectAtIndex:indexPath.row]]; 
      NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc]  initWithString:completeString]; 
      [attributedString setAttributes:firstAttributes range:[completeString rangeOfString:[_libraryPdfArray objectAtIndex:indexPath.row]]]; 
      [attributedString setAttributes:secondAttributes range:[completeString rangeOfString:[_libraryPdfDateArray objectAtIndex:indexPath.row]]];    
      cell.headerLabel.attributedText = attributedString; 

      cell.subLabel.text = [_libraryPdfSubtitleArray objectAtIndex:indexPath.row]; 

     } 
      break; 

     case 1: 
     { 
      UIFont *font = [UIFont systemFontOfSize:14.0]; 
      NSDictionary *firstAttributes = [NSDictionary dictionaryWithObjectsAndKeys:font,NSFontAttributeName,[UIColor darkGrayColor],NSForegroundColorAttributeName,nil]; 
      NSString* completeString = [NSString stringWithFormat:@"%@ | %@",[_ebriefingPdfArray objectAtIndex:indexPath.row],[_ebriefingSecondLabelTextArray objectAtIndex:indexPath.row]]; 
      NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc]  initWithString:completeString]; 
      [attributedString setAttributes:firstAttributes range:[completeString rangeOfString:[_ebriefingPdfArray objectAtIndex:indexPath.row]]]; 
      [attributedString setAttributes:firstAttributes range:[completeString rangeOfString:[_ebriefingSubtitleArray objectAtIndex:indexPath.row]]]; 
      cell.headerLabel.attributedText = attributedString; 
      cell.subLabel.text = [_ebriefingSubtitleArray objectAtIndex:indexPath.row]; 
     } 
      break; 

     default: 
      break; 
    } 

    return cell; 
}

來源

2013-06-28 Ankit Srivastava

下載它，請添加對你爲什麼投下來的註釋。 –

我的猜測是，如果你向我們展示你迄今爲止所做的事情，你將不會得到反對票。 –

@AnkitSrivastava看到我從這個鏈接的答案http://stackoverflow.com/questions/14068962/how-to-use-multiple-font-stylings-on-a-single-string-inside-a-label/14068992#14068992 :) –

我已經得到了解決。

在Cell類，我們可以輸入字符串歸結如下

- (void) formatText:(BOOL)isSelected{ 
    UIFont *font = [UIFont systemFontOfSize:14.0]; 
    UIFont *secondFont = [UIFont systemFontOfSize:10.0]; 

    NSMutableDictionary *firstAttributes; 
    NSMutableDictionary *secondAttributes; 

    NSDictionary *firstAttributeFont = @{NSFontAttributeName:font}; 
    NSDictionary *secondAttributeFont = @{NSFontAttributeName:secondFont}; 

    [firstAttributes addEntriesFromDictionary:firstAttributeFont]; 
    [secondAttributes addEntriesFromDictionary:secondAttributeFont]; 

    if (!isSelected) { 
     [firstAttributes addEntriesFromDictionary:@{NSForegroundColorAttributeName:[UIColor darkGrayColor]}]; 
     [secondAttributes addEntriesFromDictionary:@{NSForegroundColorAttributeName:[UIColor lightGrayColor]}]; 

    } 
    else{ 
     [firstAttributes addEntriesFromDictionary:@{NSForegroundColorAttributeName:[UIColor whiteColor]}]; 
     [secondAttributes addEntriesFromDictionary:@{NSForegroundColorAttributeName:[UIColor colorWithWhite:1.0 alpha:4.0]}]; 
    } 


    NSString* completeString = [NSString stringWithFormat:@"%@ %@",self.firstAttributeText,self.secondAttributeText]; 
    NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc]  initWithString:completeString]; 
    [attributedString setAttributes:firstAttributes range:[completeString rangeOfString:self.firstAttributeText]]; 
    [attributedString setAttributes:secondAttributes range:[completeString rangeOfString:self.secondAttributeText]]; 
    self.headerLabel.attributedText = attributedString; 
} 

- (void)setSelected:(BOOL)selected animated:(BOOL)animated{ 

    [super setSelected:selected animated:animated]; 
    [self formatText:selected]; 
    // Configure the view for the selected state 

} 

-(void)setHighlighted:(BOOL)highlighted animated:(BOOL)animated{ 

    [super setHighlighted:highlighted animated:animated]; 
    [self formatText:highlighted]; 

}

來源

2013-06-28 11:35:09

嘗試使用這一

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
     { 

     UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath]; 

     UILabel *label = (UILabel *)[cell viewWithTag:yourTag]; 

     NSMutableAttributedString *str = [[NSMutableAttributedString alloc] initWithString:label.text]; 

[str addAttribute:NSForegroundColorAttributeName value:[UIColor whiteColor] range:NSMakeRange(10,10)]; 

     label.attributedText = str 
     }

來源

2013-06-28 10:40:23

這是一個選擇willSelect和willDeselect單元的替代解決方案，但我試圖通過避免在控制器中使用文本更改而不是在單元類中找出一些更好的解決方案。 –

你應該做「label.attributedText = str」，而不是簡單的「label.text = str」 – superpuccio

@superpuccio謝謝改變.... –

-1

您可以使用RTLabel類它會非常有用。從這裏RTLabel

來源

2013-06-28 16:47:50

是的，讓我們解決這個與第三方庫... – TheCodingArt

的UILabel子類的解決方案

@implementation CustomLabelHighlighted { 
    NSAttributedString *savedAttributedString; 
} 

-(void)setHighlighted:(BOOL)highlighted { 
    if(!SYSTEM_VERSION_LESS_THAN(@"6.0")){ 
     if(highlighted){ 
      if(!self.attributedText){ 
       return; 
      } 

      NSMutableAttributedString *highAttributedString = [self.attributedText mutableCopy]; 
[highAttributedString addAttribute:NSForegroundColorAttributeName value:[UIColor whiteColor] range:(NSRange){0, [highAttributedString.string length]}]; 

      // important! 
      [super setAttributedText:highAttributedString]; 
     } 
     else{ 
      if(savedAttributedString){ 
       self.attributedText = savedAttributedString; 
      } 
     } 
    } else { 
     [super setHighlighted:highlighted]; 
    } 
} 

- (void)setAttributedText:(NSAttributedString *)attributedText { 
    [super setAttributedText:attributedText]; 
    savedAttributedString = attributedText; 
} 

@end

來源

2014-12-23 08:20:43 Uladzimir

使用NSAttributedString爲UILabel設置突出顯示的文本顏色。

回答

相關問題