ios - NSAttributedString agrega alineación de texto

objective-c core-text

Question

¿Cómo puedo agregar un atributo de alineación de texto a un NSAttributedString para centrar el texto?

Editar: ¿Estoy haciendo algo mal? No parece cambiar la alineación.

CTParagraphStyleSetting setting;
setting.spec = kCTParagraphStyleSpecifierAlignment;
setting.valueSize = kCTCenterTextAlignment;
CTParagraphStyleSetting settings[1] = {
{kCTParagraphStyleSpecifierAlignment, sizeof(CGFloat), &setting},
};
CTParagraphStyleRef paragraph = CTParagraphStyleCreate(settings, sizeof(setting));
NSMutableAttributedString *mutableAttributed = [[NSMutableAttributedString alloc] initWithAttributedString:self.attributedString];
[mutableAttributed addAttributes:[NSDictionary dictionaryWithObjectsAndKeys:(NSObject*)paragraph ,(NSString*) kCTParagraphStyleAttributeName, nil] range:_selectedRange];

Answer 1

Swift 3.0+

let titleParagraphStyle = NSMutableParagraphStyle()
titleParagraphStyle.alignment = .center
let titleFont = UIFont.preferredFont(forTextStyle: UIFontTextStyle.headline)
let title = NSMutableAttributedString(string: "You Are Registered",
attributes: [NSFontAttributeName:titleFont,
NSForegroundColorAttributeName:UIColor.red,
NSParagraphStyleAttributeName: titleParagraphStyle])

(respuesta original a continuación)

Swift 2.0+

let titleParagraphStyle = NSMutableParagraphStyle()
titleParagraphStyle.alignment = .Center
let titleFont = UIFont.preferredFontForTextStyle(UIFontTextStyleHeadline)
let title = NSMutableAttributedString(string: "You Are Registered",
attributes:[NSFontAttributeName:titleFont,
NSForegroundColorAttributeName:UIColor.redColor(),
NSParagraphStyleAttributeName: titleParagraphStyle])

Answer 2

Como NSAttributedString se usa principalmente con Core Text en iOS, debe usar CTParagraphStyle lugar de NSParagraphStyle . No hay variante mutable.

Por ejemplo:

CTTextAlignment alignment = kCTCenterTextAlignment;
CTParagraphStyleSetting alignmentSetting;
alignmentSetting.spec = kCTParagraphStyleSpecifierAlignment;
alignmentSetting.valueSize = sizeof(CTTextAlignment);
alignmentSetting.value = &alignment;
CTParagraphStyleSetting settings[1] = {alignmentSetting};
size_t settingsCount = 1;
CTParagraphStyleRef paragraphRef = CTParagraphStyleCreate(settings, settingsCount);
NSDictionary *attributes = @{(__bridge id)kCTParagraphStyleAttributeName : (__bridge id)paragraphRef};
NSAttributedString *attributedString = [[NSAttributedString alloc] initWithString:@"Hello World" attributes:attributes];

Answer 3

Estaba buscando el mismo problema y pude centrar el texto en un NSAttributedString de esta manera:

NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc]init] ;
[paragraphStyle setAlignment:NSTextAlignmentCenter];
NSMutableAttributedString *attribString = [[NSMutableAttributedString alloc]initWithString:string];
[attribString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [string length])];

Answer 4

Swift 4 respuesta:

// Define paragraph style - you got to pass it along to NSAttributedString constructor
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.alignment = .center
// Define attributed string attributes
let attributes = [.paragraphStyle: paragraphStyle]
let attributedString = NSAttributedString(string:"Test", attributes: attributes)

Answer 5

 NSMutableParagraphStyle *paragraphStyle = NSMutableParagraphStyle.new;
paragraphStyle.alignment = NSTextAlignmentCenter;
NSAttributedString *attributedString =
[NSAttributedString.alloc initWithString:@"someText"
attributes:
@{NSParagraphStyleAttributeName:paragraphStyle}];

Answer 6

[averagRatioArray addObject:[NSString stringWithFormat:@"When you respond Yes to %@ the average response to %@ was %0.02f",QString1,QString2,M1]];
[averagRatioArray addObject:[NSString stringWithFormat:@"When you respond No to %@ the average response to %@ was %0.02f",QString1,QString2,M0]];
UIFont *font2 = [UIFont fontWithName:@"Helvetica-Bold" size:15];
UIFont *font = [UIFont fontWithName:@"Helvetica-Bold" size:12];
NSMutableAttributedString *str=[[NSMutableAttributedString alloc] initWithString:[NSString stringWithFormat:@"When you respond Yes to %@ the average response to %@ was",QString1,QString2]];
[str addAttribute:NSFontAttributeName value:font range:NSMakeRange(0,[@"When you respond Yes to " length])];
[str addAttribute:NSFontAttributeName value:font2 range:NSMakeRange([@"When you respond Yes to " length],[QString1 length])];
[str addAttribute:NSFontAttributeName value:font range:NSMakeRange([QString1 length],[@" the average response to " length])];
[str addAttribute:NSFontAttributeName value:font2 range:NSMakeRange([@" the average response to " length],[QString2 length])];
[str addAttribute:NSFontAttributeName value:font range:NSMakeRange([QString2 length] ,[@" was" length])];
// [str addAttribute:NSFontAttributeName value:font2 range:NSMakeRange(49+[QString1 length]+[QString2 length] ,8)];
[averagRatioArray addObject:[NSString stringWithFormat:@"%@",str]];