Swift

Question

我想知道是否可以用两行文本创建一个 UIButton。我需要每一行都有不同的字体大小。第一行将是 17 点，第二行将是 11 点。我试过将两个标签放在 UIButton 中，但我无法让它们留在按钮的范围内。

我正在尝试在 ui builder 中执行所有这些操作，而不是以编程方式。

谢谢

Answer 1

将换行符更改为字符换行，select 您的按钮和属性检查器中转到换行符并将其更改为字符换行

Answer 2

您需要在代码中完成其中的一些工作。你不能在 IB 中设置 2 种不同的字体。除了将换行模式改为字符换行外，还需要这样设置标题，

override func viewDidLoad() {
        super.viewDidLoad()
        var str = NSMutableAttributedString(string: "First line\nSecond Line")
        str.addAttribute(NSFontAttributeName, value: UIFont.systemFontOfSize(17), range: NSMakeRange(0, 10))
        str.addAttribute(NSFontAttributeName, value: UIFont.systemFontOfSize(12), range: NSMakeRange(11, 11))
        button.setAttributedTitle(str, forState: .Normal)

    }

Answer 3

有两个问题。

I was wondering if it is possible to create a UIButton with two lines of text

这可以通过使用故事板或以编程方式实现。

故事板：

将 'Line Break Mode' 更改为 Character Wrap 或 Word Wrap 并使用 Alt/Option + Enter 键在 UIButton 的标题字段中输入一个新行。

以编程方式：

override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(animated)

        btnTwoLine?.titleLabel?.lineBreakMode = NSLineBreakMode.ByWordWrapping;
}

I need each line to have a different font size 1

最坏的情况是，您可以使用自定义 UIButton class 并在其中添加两个标签。

更好的方法是使用NSMutableAttributedString。请注意，这只能通过编程方式实现。

Swift 5:

@IBOutlet weak var btnTwoLine: UIButton?

override func viewDidAppear(animated: Bool) {
    super.viewDidAppear(animated)

    //applying the line break mode
    textResponseButton?.titleLabel?.lineBreakMode = NSLineBreakMode.byWordWrapping;
    let buttonText: NSString = "hello\nthere"

    //getting the range to separate the button title strings
    let newlineRange: NSRange = buttonText.range(of: "\n")

    //getting both substrings
    var substring1 = ""
    var substring2 = ""

    if(newlineRange.location != NSNotFound) {
        substring1 = buttonText.substring(to: newlineRange.location)
        substring2 = buttonText.substring(from: newlineRange.location)
    }

    //assigning diffrent fonts to both substrings
    let font1: UIFont = UIFont(name: "Arial", size: 17.0)!
    let attributes1 = [NSMutableAttributedString.Key.font: font1]
    let attrString1 = NSMutableAttributedString(string: substring1, attributes: attributes1)

    let font2: UIFont = UIFont(name: "Arial", size: 11.0)!
    let attributes2 = [NSMutableAttributedString.Key.font: font2]
    let attrString2 = NSMutableAttributedString(string: substring2, attributes: attributes2)

    //appending both attributed strings
    attrString1.append(attrString2)

    //assigning the resultant attributed strings to the button
    textResponseButton?.setAttributedTitle(attrString1, for: [])
}

年长Swift

@IBOutlet weak var btnTwoLine: UIButton?

override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(animated)

        //applying the line break mode
        btnTwoLine?.titleLabel?.lineBreakMode = NSLineBreakMode.ByWordWrapping;

        var buttonText: NSString = "hello\nthere"

        //getting the range to separate the button title strings
        var newlineRange: NSRange = buttonText.rangeOfString("\n")

        //getting both substrings
        var substring1: NSString = ""
        var substring2: NSString = ""

        if(newlineRange.location != NSNotFound) {
            substring1 = buttonText.substringToIndex(newlineRange.location)
            substring2 = buttonText.substringFromIndex(newlineRange.location)
        }

        //assigning diffrent fonts to both substrings
        let font:UIFont? = UIFont(name: "Arial", size: 17.0)
        let attrString = NSMutableAttributedString(
            string: substring1 as String,
            attributes: NSDictionary(
                object: font!,
                forKey: NSFontAttributeName) as [NSObject : AnyObject])

        let font1:UIFont? = UIFont(name: "Arial", size: 11.0)
        let attrString1 = NSMutableAttributedString(
            string: substring2 as String,
            attributes: NSDictionary(
                object: font1!,
                forKey: NSFontAttributeName) as [NSObject : AnyObject])

        //appending both attributed strings
        attrString.appendAttributedString(attrString1)

        //assigning the resultant attributed strings to the button
        btnTwoLine?.setAttributedTitle(attrString, forState: UIControlState.Normal)

    }

输出

Answer 4

我想，一种方法是使用标签。我这样做了，它似乎工作正常。我想我可以将其创建为 UIButton，然后公开标签。我不知道这是否有意义。

    let firstLabel = UILabel()

    firstLabel.backgroundColor = UIColor.lightGrayColor()
    firstLabel.text = "Hi"
    firstLabel.textColor = UIColor.blueColor()
    firstLabel.textAlignment = NSTextAlignment.Center
    firstLabel.frame = CGRectMake(0, testButton.frame.height * 0.25, testButton.frame.width, testButton.frame.height * 0.2)
    testButton.addSubview(firstLabel)

    let secondLabel = UILabel()

    secondLabel.backgroundColor = UIColor.lightGrayColor()
    secondLabel.textColor = UIColor.blueColor()
    secondLabel.font = UIFont(name: "Arial", size: 12)
    secondLabel.text = "There"
    secondLabel.textAlignment = NSTextAlignment.Center
    secondLabel.frame = CGRectMake(0, testButton.frame.height * 0.5, testButton.frame.width, testButton.frame.height * 0.2)
    testButton.addSubview(secondLabel)

Answer 5

SWIFT 3 语法

let str = NSMutableAttributedString(string: "First line\nSecond Line")
str.addAttribute(NSFontAttributeName, value: UIFont.systemFont(ofSize: 17), range: NSMakeRange(0, 10))
str.addAttribute(NSFontAttributeName, value: UIFont.systemFont(ofSize: 12), range: NSMakeRange(11, 11))
button.setAttributedTitle(str, for: .normal)

Answer 6

我注意到大多数解决方案中的一个问题，即在将换行模式设置为 "Character Wrap" 时，第二行将与第一行左对齐

使所有线条居中。只需将标题从 Plain 更改为 Attributed，然后您就可以使每一行居中

Answer 7

我已经解决了这个问题，我的解决方案只在 Storyboard 中。

变化：

它添加在 Identity Inspector -> User Defined Runtime Attributes（这些 KeyPaths）中：

行数 = 2
titleLabel.textAlignment = 1

User Defined Runtime Attributes

我在属性检查器中添加了这个：

换行=自动换行

Word wrap

Answer 8

我一直在寻找几乎相同的主题，只是我不需要两种不同的字体大小。如果有人正在寻找一个简单的解决方案：

    let button = UIButton()
    button.titleLabel?.numberOfLines = 0
    button.titleLabel?.lineBreakMode = .byWordWrapping
    button.setTitle("Foo\nBar", for: .normal)
    button.titleLabel?.textAlignment = .center
    button.sizeToFit()
    button.addTarget(self, action: #selector(rightBarButtonTapped), for: .allEvents)
    navigationItem.rightBarButtonItem = UIBarButtonItem(customView: button)

Answer 9

我的方式：

func setButtonTitle(title: String, subtitle: String, button: UIButton){
        //applying the line break mode
        button.titleLabel?.lineBreakMode = NSLineBreakMode.byWordWrapping;
        let title = NSMutableAttributedString(string: title, attributes: Attributes.biggestLabel)
        let subtitle = NSMutableAttributedString(string: subtitle, attributes: Attributes.label)
        let char = NSMutableAttributedString(string: "\n", attributes: Attributes.biggestLabel)
        title.append(char)
        title.append(subtitle)
        button.setAttributedTitle(title, for: .normal)
    }

Answer 10

不幸的是，当我想在 CollectionView 中有一个多行按钮时，建议的解决方案对我不起作用。然后一位同事向我展示了一个解决方法，我想分享它以防有人遇到同样的问题 - 希望这有帮助！创建一个继承自 UIControl 的 class 并使用标签对其进行扩展，然后该标签的行为类似于按钮。

class MultilineButton: UIControl {

    let label: UILabel = {
        [=10=].translatesAutoresizingMaskIntoConstraints = false
        [=10=].numberOfLines = 0
        [=10=].textAlignment = .center
        return [=10=]
    }(UILabel())

    override init(frame: CGRect) {
        super.init(frame: frame)

        addSubview(label)

        NSLayoutConstraint.activate([
            label.leadingAnchor.constraint(equalTo: layoutMarginsGuide.leadingAnchor),
            label.trailingAnchor.constraint(equalTo: layoutMarginsGuide.trailingAnchor),
            label.topAnchor.constraint(equalTo: layoutMarginsGuide.topAnchor),
            label.bottomAnchor.constraint(equalTo: layoutMarginsGuide.bottomAnchor)
        ])
    }

    override var isHighlighted: Bool {
        didSet {
            backgroundColor = backgroundColor?.withAlphaComponent(isHighlighted ? 0.7 : 1.0)
            label.textColor = label.textColor.withAlphaComponent(isHighlighted ? 0.7 : 1.0)
        }
    }

    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

Answer 11

新 Xcode 13 (iOS 15)

从Xcode13开始，按钮的标题和副标题可以分别设置它们的属性。

使用故事板：

在按钮的属性检查器中，select按标题“归属”。然后更改标题和副标题的字体大小。

或以编程方式：

// Create Title
let titleSettings = AttributeContainer.font( UIFont(name: "HelveticaNeue-Italic", size: 17)! )
yourButton.configuration?.attributedTitle = AttributedString("Button's Title", attributes: titleSettings)

// Create Subtitle
let subtitleSettings = AttributeContainer.font( UIFont(name: "HelveticaNeue-Italic", size: 11)! )
yourButton.configuration?.attributedSubtitle = AttributedString("Button's Subtitle", attributes: subtitleSettings)

Swift - 带有两行文本的 UIButton

Swift - UIButton with two lines of text

uibutton

ios