Format UILabel with bullet points?
Perhaps use the Unicode code point for the bullet character in your string?
Objective-c
myLabel.text = @"\u2022 This is a list item!";
Swift 4
myLabel.text = "\u{2022} This is a list item!"
How to make a bullet list with Swift?
use 2 labels inside a view for the columns. both labels being multulined
class Helper {
static func bulletedList(strings:[String], textColor:UIColor, font:UIFont, bulletColor:UIColor, bulletSize:BulletSize) -> NSAttributedString {
let textAttributesDictionary = [NSFontAttributeName : font, NSForegroundColorAttributeName:textColor]
let bulletAttributesDictionary = [NSFontAttributeName : font.withSize(bulletSize.rawValue), NSForegroundColorAttributeName:bulletColor]
let fullAttributedString = NSMutableAttributedString.init()
for string: String in strings
{
let bulletPoint: String = "\u{2022}"
let formattedString: String = "\(bulletPoint) \(string)\n"
let attributedString: NSMutableAttributedString = NSMutableAttributedString(string: formattedString)
let paragraphStyle = createParagraphAttribute()
attributedString.addAttributes([NSParagraphStyleAttributeName: paragraphStyle], range: NSMakeRange(0, attributedString.length))
attributedString.addAttributes(textAttributesDictionary, range: NSMakeRange(0, attributedString.length))
let string:NSString = NSString(string: formattedString)
let rangeForBullet:NSRange = string.range(of: bulletPoint)
attributedString.addAttributes(bulletAttributesDictionary, range: rangeForBullet)
fullAttributedString.append(attributedString)
}
return fullAttributedString
}
static func createParagraphAttribute() -> NSParagraphStyle {
var paragraphStyle: NSMutableParagraphStyle
paragraphStyle = NSParagraphStyle.default.mutableCopy() as! NSMutableParagraphStyle
paragraphStyle.tabStops = [NSTextTab(textAlignment: .left, location: 15, options: NSDictionary() as! [String : AnyObject])]
paragraphStyle.defaultTabInterval = 15
paragraphStyle.firstLineHeadIndent = 0
paragraphStyle.lineSpacing = 3
paragraphStyle.headIndent = 10
return paragraphStyle
}
}
and simply use Helper.bulletedList
to create your bulletted list as Attributed text for the label
NSAttributedString inserting a bullet point?
The easy bit: [mutableAttributedString insertAttributedString: @"•\t" atIndex:0];
The hard bit. Something along the following lines. (This is extracted from a bigger project, but it may give you a decent start.)
NSMutableAttributedString * string = [[NSMutableAttributedString alloc] initWithString:@"•\texample bullet fill out the text to check what happens on the second line and make sure it is lining up OK"];
CTTextAlignment alignment = kCTLeftTextAlignment;
CGFloat paragraphSpacing = 0.0;
CGFloat paragraphSpacingBefore = 0.0;
CGFloat firstLineHeadIndent = 15.0;
CGFloat headIndent = 30.0;
CGFloat firstTabStop = 15.0; // width of your indent
CGFloat lineSpacing = 0.45;
CTTextTabRef tabArray[] = { CTTextTabCreate(0, firstTabStop, NULL) };
CFArrayRef tabStops = CFArrayCreate( kCFAllocatorDefault, (const void**) tabArray, 1, &kCFTypeArrayCallBacks );
CFRelease(tabArray[0]);
CTParagraphStyleSetting altSettings[] =
{
{ kCTParagraphStyleSpecifierLineSpacing, sizeof(CGFloat), &lineSpacing},
{ kCTParagraphStyleSpecifierAlignment, sizeof(CTTextAlignment), &alignment},
{ kCTParagraphStyleSpecifierFirstLineHeadIndent, sizeof(CGFloat), &firstLineHeadIndent},
{ kCTParagraphStyleSpecifierHeadIndent, sizeof(CGFloat), &headIndent},
{ kCTParagraphStyleSpecifierTabStops, sizeof(CFArrayRef), &tabStops},
{ kCTParagraphStyleSpecifierParagraphSpacing, sizeof(CGFloat), ¶graphSpacing},
{ kCTParagraphStyleSpecifierParagraphSpacingBefore, sizeof(CGFloat), ¶graphSpacingBefore}
};
CTParagraphStyleRef style;
style = CTParagraphStyleCreate( altSettings, sizeof(altSettings) / sizeof(CTParagraphStyleSetting) );
if ( style == NULL )
{
NSLog(@"*** Unable To Create CTParagraphStyle in apply paragraph formatting" );
return;
}
[string addAttributes:[NSDictionary dictionaryWithObjectsAndKeys:(NSObject*)style,(NSString*) kCTParagraphStyleAttributeName, nil] range:NSMakeRange(0,[string length])];
CFRelease(tabStops);
CFRelease(style);
You need to include the CoreText framework and then import CoreText/CoreText.h
Adding some bullet points to my application
You can use Unicode characters:
NSString *stringWithBullets = @"\u00b7 one";
will produce:
• one
iOS7 TextKit: bullet point alignment
Below it the code I use to set a bulleted paragraph. This comes straight out of a working app and is used to apply the style to the entire paragraph in response to a user clicking on a formatting button. I have tried to put in all the dependent methods but may have missed some.
Note that I am setting most indents in centimetres and hence the use of the conversion functions at the end of the listing.
I am also checking for the presence of a tab character (no tab key on iOS!) and automatically insert a dash and a tab.
If all you need is the paragraph style then look at the last few methods below where the firstLineIndent etc get set up.
Note that these calls all get wrapped in [textStorage beginEditing/endEditing]
. Despite the (IBAction) below the method is not getting called by a UI object directly.
- (IBAction) styleBullet1:(id)sender
{
NSRange charRange = [self rangeForUserParagraphAttributeChange];
NSTextStorage *myTextStorage = [self textStorage];
// Check for "-\t" at beginning of string and add if not found
NSAttributedString *attrString = [myTextStorage attributedSubstringFromRange:charRange];
NSString *string = [attrString string];
if ([string rangeOfString:@"\t"].location == NSNotFound) {
NSLog(@"string does not contain tab so insert one");
NSAttributedString * aStr = [[NSAttributedString alloc] initWithString:@"-\t"];
// Insert a bullet and tab
[[self textStorage] insertAttributedString:aStr atIndex:charRange.location];
} else {
NSLog(@"string contains tab");
}
if ([self isEditable] && charRange.location != NSNotFound)
{
[myTextStorage setAttributes:[self bullet1Style] range:charRange];
}
}
- (NSDictionary*)bullet1Style
{
return [self createStyle:[self getBullet1ParagraphStyle] font:[self normalFont] fontColor:[UIColor blackColor] underlineStyle:NSUnderlineStyleNone];
}
- (NSDictionary*)createStyle:(NSParagraphStyle*)paraStyle font:(UIFont*)font fontColor:(UIColor*)color underlineStyle:(int)underlineStyle
{
NSMutableDictionary *style = [[NSMutableDictionary alloc] init];
[style setValue:paraStyle forKey:NSParagraphStyleAttributeName];
[style setValue:font forKey:NSFontAttributeName];
[style setValue:color forKey:NSForegroundColorAttributeName];
[style setValue:[NSNumber numberWithInt: underlineStyle] forKey:NSUnderlineStyleAttributeName];
FLOG(@" font is %@", font);
return style;
}
- (NSParagraphStyle*)getBullet1ParagraphStyle
{
NSMutableParagraphStyle *para;
para = [self getDefaultParagraphStyle];
NSMutableArray *tabs = [[NSMutableArray alloc] init];
[tabs addObject:[[NSTextTab alloc] initWithTextAlignment:NSTextAlignmentLeft location:[self ptsFromCMF:1.0] options:nil]];
//[tabs addObject:[[NSTextTab alloc] initWithType:NSLeftTabStopType location:[self ptsFromCMF:1.0]]];
[para setTabStops:tabs];
[para setDefaultTabInterval:[self ptsFromCMF:2.0]];
[para setFirstLineHeadIndent:[self ptsFromCMF:0.0]];
//[para setHeaderLevel:0];
[para setHeadIndent:[self ptsFromCMF:1.0]];
[para setParagraphSpacing:3];
[para setParagraphSpacingBefore:3];
return para;
}
- (NSMutableParagraphStyle*)getDefaultParagraphStyle
{
NSMutableParagraphStyle *para;
para = [[NSParagraphStyle defaultParagraphStyle]mutableCopy];
[para setTabStops:nil];
[para setAlignment:NSTextAlignmentLeft];
[para setBaseWritingDirection:NSWritingDirectionLeftToRight];
[para setDefaultTabInterval:[self ptsFromCMF:3.0]];
[para setFirstLineHeadIndent:0];
//[para setHeaderLevel:0];
[para setHeadIndent:0.0];
[para setHyphenationFactor:0.0];
[para setLineBreakMode:NSLineBreakByWordWrapping];
[para setLineHeightMultiple:1.0];
[para setLineSpacing:0.0];
[para setMaximumLineHeight:0];
[para setMinimumLineHeight:0];
[para setParagraphSpacing:6];
[para setParagraphSpacingBefore:3];
//[para setTabStops:<#(NSArray *)#>];
[para setTailIndent:0.0];
return para;
}
-(NSNumber*)ptsFromCMN:(float)cm
{
return [NSNumber numberWithFloat:[self ptsFromCMF:cm]];
}
-(float)ptsFromCMF:(float)cm
{
return cm * 28.3464567;
}
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