问题
Is it possible to format the text in a UILabel to show a bullet point?
If so, How can I do it?
回答1:
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!"
回答2:
just add " • "
Even i was looking for something like this for my textView. What i did, just append above string with my string and pass it to my textView, same can be done for labels also.
I answered this for future Viewer.
回答3:
Here is nice solution with Swift
let label = UILabel()
label.frame = CGRect(x: 40, y: 100, width: 280, height: 600)
label.textColor = UIColor.lightGray
label.numberOfLines = 0
let arrayString = [
"Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.",
"Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.",
"Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.",
"Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."
]
label.attributedText = add(stringList: arrayString, font: label.font, bullet: "")
self.view.addSubview(label)
Add bullet attributes
func add(stringList: [String],
font: UIFont,
bullet: String = "\u{2022}",
indentation: CGFloat = 20,
lineSpacing: CGFloat = 2,
paragraphSpacing: CGFloat = 12,
textColor: UIColor = .gray,
bulletColor: UIColor = .red) -> NSAttributedString {
let textAttributes: [NSAttributedStringKey: Any] = [NSAttributedStringKey.font: font, NSAttributedStringKey.foregroundColor: textColor]
let bulletAttributes: [NSAttributedStringKey: Any] = [NSAttributedStringKey.font: font, NSAttributedStringKey.foregroundColor: bulletColor]
let paragraphStyle = NSMutableParagraphStyle()
let nonOptions = [NSTextTab.OptionKey: Any]()
paragraphStyle.tabStops = [
NSTextTab(textAlignment: .left, location: indentation, options: nonOptions)]
paragraphStyle.defaultTabInterval = indentation
//paragraphStyle.firstLineHeadIndent = 0
//paragraphStyle.headIndent = 20
//paragraphStyle.tailIndent = 1
paragraphStyle.lineSpacing = lineSpacing
paragraphStyle.paragraphSpacing = paragraphSpacing
paragraphStyle.headIndent = indentation
let bulletList = NSMutableAttributedString()
for string in stringList {
let formattedString = "\(bullet)\t\(string)\n"
let attributedString = NSMutableAttributedString(string: formattedString)
attributedString.addAttributes(
[NSAttributedStringKey.paragraphStyle : paragraphStyle],
range: NSMakeRange(0, attributedString.length))
attributedString.addAttributes(
textAttributes,
range: NSMakeRange(0, attributedString.length))
let string:NSString = NSString(string: formattedString)
let rangeForBullet:NSRange = string.range(of: bullet)
attributedString.addAttributes(bulletAttributes, range: rangeForBullet)
bulletList.append(attributedString)
}
return bulletList
}
Here is result:
回答4:
In swift 3.1
lblItemName.text = "\u{2022} This is a list item!"
回答5:
In Swift 4 i have used " • " with new Line
@IBOutlet weak var bulletLabel: UILabel!
let arrayOfLines = ["Eat egg for protein","You should Eat Ghee","Wheat is with high fiber","Avoid to eat Fish "]
for value in arrayOfLines {
bulletLabel.text = bulletLabel.text! + " • " + value + "\n"
}
Output:
回答6:
Check out this link, I made a Custom view to format text with bullet points/ other symbols/ image(using attributeText property of UILabel) as list item symbol (Swift 3.0) https://github.com/akshaykumarboth/SymbolTextLabel-iOS-Swift
import UIKit
class ViewController: UIViewController {
@IBOutlet var symbolView: SymbolTextLabel!
var testString = "Understanding the concept of sales"
var bulletSymbol = "\u{2022}"
var fontsize: CGFloat= 18
override func viewDidLoad() {
super.viewDidLoad()
//First way // Dynamically creating SymbolTextLabel object
let symbolTextLabel = SymbolTextLabel(frame: CGRect(x: 0, y: 0, width: 0, height: 0))
symbolTextLabel.setText(text: testString, symbolCode: bulletSymbol) //setting text and symbol of text item
symbolTextLabel.setFontSize(textSize: fontsize) // setting font size
//symbolTextLabel.setSpacing(spacing: 5) // setting space between symbol and text
self.view.addSubview(symbolTextLabel)
//second way // from storyboard or interface builder
symbolView.setText(text: testString, symbolCode: bulletSymbol)
//setting text and symbol of text item
symbolView.setFontSize(textSize: fontsize) // setting font size
//symbolView.setSpacing(spacing: 5) // setting space between symbol and text
}
}
回答7:
If you want to align the text indenting for the bullet points as well, you can use the following method that builds a NSAttributedString with the proper indentation and spacing properties:
- (NSAttributedString *)attributedStringForBulletTexts:(NSArray *)stringList
withFont:(UIFont *)font
bulletString:(NSString *)bullet
indentation:(CGFloat)indentation
lineSpacing:(CGFloat)lineSpacing
paragraphSpacing:(CGFloat)paragraphSpacing
textColor:(UIColor *)textColor
bulletColor:(UIColor *)bulletColor {
NSDictionary *textAttributes = @{NSFontAttributeName: font,
NSForegroundColorAttributeName: textColor};
NSDictionary *bulletAttributes = @{NSFontAttributeName: font, NSForegroundColorAttributeName: bulletColor};
NSMutableParagraphStyle *paragraphStyle = [NSMutableParagraphStyle new];
paragraphStyle.tabStops = @[[[NSTextTab alloc] initWithTextAlignment: NSTextAlignmentLeft location:indentation options:@{}]];
paragraphStyle.defaultTabInterval = indentation;
paragraphStyle.lineSpacing = lineSpacing;
paragraphStyle.paragraphSpacing = paragraphSpacing;
paragraphStyle.headIndent = indentation;
NSMutableAttributedString *bulletList = [NSMutableAttributedString new];
for (NSString *string in stringList) {
NSString *formattedString = [NSString stringWithFormat:@"%@\t%@\n", bullet, string];
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:formattedString];
if (string == stringList.lastObject) {
paragraphStyle = [paragraphStyle mutableCopy];
paragraphStyle.paragraphSpacing = 0;
}
[attributedString addAttributes:@{NSParagraphStyleAttributeName: paragraphStyle} range:NSMakeRange(0, attributedString.length)];
[attributedString addAttributes:textAttributes range:NSMakeRange(0, attributedString.length)];
NSRange rangeForBullet = [formattedString rangeOfString:bullet];
[attributedString addAttributes:bulletAttributes range:rangeForBullet];
[bulletList appendAttributedString:attributedString];
}
return bulletList;
}
And you can use that method as follows, by passing an NSArray with the texts and providing you already have a UILabel:
NSArray *stringArray = @[@"Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.",
@"Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.",
@"Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.",
@"Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."
];
label.attributedText = [self attributedStringForBulletTexts:stringArray
withFont:label.font
bulletString:@"•"
indentation:15
lineSpacing:2
paragraphSpacing:10
textColor:UIColor.blackColor
bulletColor:UIColor.grayColor];
回答8:
Yes. Copy and paste the following bullet: • Swift's compiler can interpret and display the bullet as desired within Xcode, nothing else needed.
Reuse
extension String {
static var bullet: String {
return "• "
}
}
print(String.bullet + "Buy apples")
let secondPoint: String = .bullet + "Buy oranges"
print(secondPoint)
output
• Buy apples
• Buy oranges
Reusable array
extension Array where Element == String {
var bulletList: String {
var po = ""
for (index, item) in self.enumerated() {
if index != 0 {
po += "\n"
}
po += .bullet + item
}
return po
}
}
print(["get apples", "get oranges", "get a bannana"].bulletList)
output
• get apples
• get oranges
• get a bannana
来源：https://stackoverflow.com/questions/5533851/format-uilabel-with-bullet-points