NSAttributedString add text alignment - ios

Question

How can I add text alignment attribute to an NSAttributedString to center the text?
Edit:
Am I doing anything wrong? It doesn't seem to change the alignment.
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

NSMutableParagraphStyle *paragraphStyle = NSMutableParagraphStyle.new;
paragraphStyle.alignment = NSTextAlignmentCenter;
NSAttributedString *attributedString =
[NSAttributedString.alloc initWithString:#"someText"
attributes:
#{NSParagraphStyleAttributeName:paragraphStyle}];
Swift 4.2
let paragraphStyle: NSMutableParagraphStyle = NSMutableParagraphStyle()
paragraphStyle.alignment = NSTextAlignment.center
let attributedString = NSAttributedString(string: "someText", attributes: [NSAttributedString.Key.paragraphStyle : paragraphStyle])

Answer 2

I was searching for the same issue and was able to center align the text in a NSAttributedString this way:
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 3

Swift 4.0+
let titleParagraphStyle = NSMutableParagraphStyle()
titleParagraphStyle.alignment = .center
let titleFont = UIFont.preferredFont(forTextStyle: UIFontTextStyle.headline)
let title = NSMutableAttributedString(string: "You Are Registered",
attributes: [.font: titleFont,
.foregroundColor: UIColor.red,
.paragraphStyle: titleParagraphStyle])
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])
(original answer below)
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 4

As NSAttributedString is primarily used with Core Text on iOS, you have to use CTParagraphStyle instead of NSParagraphStyle. There is no mutable variant.
For example:
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 5

Swift 4 answer:
// Define paragraph style - you got to pass it along to NSAttributedString constructor
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.alignment = .center
// Define attributed string attributes
let attributes = [NSAttributedStringKey.paragraphStyle: paragraphStyle]
let attributedString = NSAttributedString(string:"Test", attributes: attributes)

Answer 6

In swift 4:
let paraStyle = NSMutableParagraphStyle.init()
paraStyle.alignment = .left
let str = "Test Message"
let attribute = [NSAttributedStringKey.font: UIFont.boldSystemFont(ofSize: 12)]
let attrMessage = NSMutableAttributedString(string: str, attributes: attribute)
attrMessage.addAttribute(kCTParagraphStyleAttributeName as NSAttributedStringKey, value: paraStyle, range: NSMakeRange(0, str.count))

Answer 7

If you use UILabel, just use label.textAlignment = .center instead

Answer 8

Xamarin.iOS
NSMutableParagraphStyle paragraphStyle = new NSMutableParagraphStyle();
paragraphStyle.HyphenationFactor = 1.0f;
var hyphenAttribute = new UIStringAttributes();
hyphenAttribute.ParagraphStyle = paragraphStyle;
var attributedString = new NSAttributedString(str: name, attributes: hyphenAttribute);

Answer 9

[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]];