ios 用项目符号格式化 UILabel？

Format UILabel with bullet points?

提问by Rob

Is it possible to format the textin a UILabelto show a bullet point?

是否可以text在 a 中格式化UILabel以显示项目符号？

If so, How can I do it?

如果是这样，我该怎么做？

回答by Chris Doble

Perhaps use the Unicode code point for the bullet character in your string?

也许对字符串中的项目符号字符使用 Unicode 代码点？

Objective-c

目标-c

myLabel.text = @"\u2022 This is a list item!";

Swift 4

斯威夫特 4

myLabel.text = "\u{2022} This is a list item!"

回答by Zac24

just add " ? "

只需添加 " ? "

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 labelsalso.

甚至我也在为我的textView. 我所做的，只需将上面的字符串附加到我的字符串并将其传递给我的textView，也可以这样做labels。

I answered this for future Viewer.

我为未来的查看者回答了这个问题。

回答by Krunal

Here is nice solution with Swift

这是 Swift 的不错解决方案

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

添加项目符号属性

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:

这是结果：

回答by Hyman

In Swift 4i have used " ? " with new Line

在Swift 4 中，我使用了 "?" 和 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:

输出：

回答by Daxesh Nagar

In swift 3.1

在迅速 3.1

lblItemName.text = "\u{2022} This is a list item!"

回答by Akshay Kumar Both

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

查看此链接，我创建了一个自定义视图，将带有项目符号/其他符号/图像（使用 UILabel 的 attributeText 属性）的文本格式化为列表项符号（Swift 3.0） https://github.com/akshaykumarboth/SymbolTextLabel-iOS-迅速

 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by Jonathan Cabrera

If you want to align the text indenting for the bullet points as well, you can use the following method that builds a NSAttributedStringwith the proper indentation and spacing properties:

如果您还想为项目符号点对齐文本缩进，您可以使用以下方法构建NSAttributedString具有适当缩进和间距属性的 a：

- (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 NSArraywith the texts and providing you already have a UILabel:

你可以按如下，通过传递的使用方法NSArray与文本，并提供你已经有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by ScottyBlades

Yes. Copy and paste the following bullet: ?Swift's compiler can interpret and display the bullet as desired within Xcode, nothing else needed.

是的。复制并粘贴以下项目符号：?Swift 的编译器可以在 Xcode 中根据需要解释和显示项目符号，无需其他任何操作。

Reuse

重用

extension String {
    static var bullet: String {
        return "? "
    }
}


print(String.bullet + "Buy apples")
let secondPoint: String = .bullet + "Buy oranges"
print(secondPoint)

output

输出

? Buy apples
? Buy oranges

Reusable array

可重用数组

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

输出

? get apples
? get oranges
? get a bannana

回答by Narasimha Nallamsetty

If anyone looking for textview text with bullet points like me, below is the answer. By the way it works only for static text.

如果有人像我一样寻找带有项目符号的 textview 文本，下面是答案。顺便说一下，它仅适用于静态文本。

?   Better experience - Refer a friend and How to Play \n? Tournaments performance improvement\n? UI/UX Improvements\n? Critical bug fixes

I have assigned above text to textview. It worked as intended for me.

我已将上述文本分配给 textview。它按我的预期工作。

回答by tadija

Here's the solution from @krunalrefactored into Swift 5 NSAttributedStringextension:

这是重构为 Swift 5扩展的@krunal的解决方案NSAttributedString：

import UIKit

public extension NSAttributedString {
    static func makeBulletList(from strings: [String],
                               bulletCharacter: String = "\u{2022}",
                               bulletAttributes: [NSAttributedString.Key: Any] = [:],
                               textAttributes: [NSAttributedString.Key: Any] = [:],
                               indentation: CGFloat = 20,
                               lineSpacing: CGFloat = 1,
                               paragraphSpacing: CGFloat = 10) -> NSAttributedString
    {
        let paragraphStyle = NSMutableParagraphStyle()
        paragraphStyle.defaultTabInterval = indentation
        paragraphStyle.tabStops = [
            NSTextTab(textAlignment: .left, location: indentation)
        ]
        paragraphStyle.lineSpacing = lineSpacing
        paragraphStyle.paragraphSpacing = paragraphSpacing
        paragraphStyle.headIndent = indentation

        let bulletList = NSMutableAttributedString()

        for string in strings {
            let bulletItem = "\(bulletCharacter)\t\(string)\n"

            var attributes = textAttributes
            attributes[.paragraphStyle] = paragraphStyle

            let attributedString = NSMutableAttributedString(
                string: bulletItem, attributes: attributes
            )

            if !bulletAttributes.isEmpty {
                let bulletRange = (bulletItem as NSString).range(of: bulletCharacter)
                attributedString.addAttributes(bulletAttributes, range: bulletRange)
            }

            bulletList.append(attributedString)
        }

        if bulletList.string.hasSuffix("\n") {
            bulletList.deleteCharacters(
                in: NSRange(location: bulletList.length - 1, length: 1)
            )
        }

        return bulletList
    }
}