ios - 如何在 UILabel 中嵌入小图标

Question

我需要UILabel在 iOS7 中嵌入小图标（某种自定义项目符号）。我如何在界面设计器中做到这一点？或者至少在代码中？

在 Android 中有leftDrawableand rightDrawablefor 标签，但在 iOS 中是如何实现的呢？安卓示例：

安卓示例

score 307 · Accepted Answer

您可以使用 iOS 7 的文本附件来做到这一点，它们是 TextKit 的一部分。一些示例代码：

NSTextAttachment *attachment = [[NSTextAttachment alloc] init];
attachment.image = [UIImage imageNamed:@"MyIcon.png"];

NSAttributedString *attachmentString = [NSAttributedString attributedStringWithAttachment:attachment];

NSMutableAttributedString *myString= [[NSMutableAttributedString alloc] initWithString:@"My label text"];
[myString appendAttributedString:attachmentString];

myLabel.attributedText = myString;

score 189 · Accepted Answer

这是在 UILabel 中嵌入图标的方法。

还要对齐图标使用attachment.bounds

斯威夫特 5.1

// Create Attachment
let imageAttachment = NSTextAttachment()
imageAttachment.image = UIImage(named:"iPhoneIcon")
// Set bound to reposition
let imageOffsetY: CGFloat = -5.0
imageAttachment.bounds = CGRect(x: 0, y: imageOffsetY, width: imageAttachment.image!.size.width, height: imageAttachment.image!.size.height)
// Create string with attachment
let attachmentString = NSAttributedString(attachment: imageAttachment)
// Initialize mutable string
let completeText = NSMutableAttributedString(string: "")
// Add image to mutable string
completeText.append(attachmentString)
// Add your text to mutable string
let textAfterIcon = NSAttributedString(string: "Using attachment.bounds!")
completeText.append(textAfterIcon)
self.mobileLabel.textAlignment = .center
self.mobileLabel.attributedText = completeText

Objective-C 版本

NSTextAttachment *imageAttachment = [[NSTextAttachment alloc] init];
imageAttachment.image = [UIImage imageNamed:@"iPhoneIcon"];
CGFloat imageOffsetY = -5.0;
imageAttachment.bounds = CGRectMake(0, imageOffsetY, imageAttachment.image.size.width, imageAttachment.image.size.height);
NSAttributedString *attachmentString = [NSAttributedString attributedStringWithAttachment:imageAttachment];
NSMutableAttributedString *completeText = [[NSMutableAttributedString alloc] initWithString:@""];
[completeText appendAttributedString:attachmentString];
NSAttributedString *textAfterIcon = [[NSAttributedString alloc] initWithString:@"Using attachment.bounds!"];
[completeText appendAttributedString:textAfterIcon];
self.mobileLabel.textAlignment = NSTextAlignmentRight;
self.mobileLabel.attributedText = completeText;

score 63 · Accepted Answer

斯威夫特 4.2：

let attachment = NSTextAttachment()        
attachment.image = UIImage(named: "yourIcon.png")
let attachmentString = NSAttributedString(attachment: attachment)
let myString = NSMutableAttributedString(string: price)
myString.append(attachmentString)
label.attributedText = myString

score 24 · Accepted Answer

斯威夫特 3 版本

let attachment = NSTextAttachment()
attachment.image = UIImage(named: "plus")
attachment.bounds = CGRect(x: 0, y: 0, width: 10, height: 10)
let attachmentStr = NSAttributedString(attachment: attachment)
let myString = NSMutableAttributedString(string: "")
myString.append(attachmentStr)
let myString1 = NSMutableAttributedString(string: "My label text")
myString.append(myString1)
lbl.attributedText = myString

UILabel 扩展

extension UILabel {

    func set(text:String, leftIcon: UIImage? = nil, rightIcon: UIImage? = nil) {

        let leftAttachment = NSTextAttachment()
        leftAttachment.image = leftIcon
        leftAttachment.bounds = CGRect(x: 0, y: -2.5, width: 20, height: 20)
        if let leftIcon = leftIcon {
            leftAttachment.bounds = CGRect(x: 0, y: -2.5, width: leftIcon.size.width, height: leftIcon.size.height)
        }
        let leftAttachmentStr = NSAttributedString(attachment: leftAttachment)

        let myString = NSMutableAttributedString(string: "")

        let rightAttachment = NSTextAttachment()
        rightAttachment.image = rightIcon
        rightAttachment.bounds = CGRect(x: 0, y: -5, width: 20, height: 20)
        let rightAttachmentStr = NSAttributedString(attachment: rightAttachment)


        if semanticContentAttribute == .forceRightToLeft {
            if rightIcon != nil {
                myString.append(rightAttachmentStr)
                myString.append(NSAttributedString(string: " "))
            }
            myString.append(NSAttributedString(string: text))
            if leftIcon != nil {
                myString.append(NSAttributedString(string: " "))
                myString.append(leftAttachmentStr)
            }
        } else {
            if leftIcon != nil {
                myString.append(leftAttachmentStr)
                myString.append(NSAttributedString(string: " "))
            }
            myString.append(NSAttributedString(string: text))
            if rightIcon != nil {
                myString.append(NSAttributedString(string: " "))
                myString.append(rightAttachmentStr)
            }
        }
        attributedText = myString
    }
}

score 23 · Accepted Answer

您的参考图像看起来像一个按钮。尝试（也可以在 Interface Builder 中完成）：

在此处输入图像描述

UIButton* button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setFrame:CGRectMake(50, 50, 100, 44)];
[button setImage:[UIImage imageNamed:@"img"] forState:UIControlStateNormal];
[button setImageEdgeInsets:UIEdgeInsetsMake(0, -30, 0, 0)];
[button setTitle:@"Abc" forState:UIControlStateNormal];
[button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[button setBackgroundColor:[UIColor yellowColor]];
[view addSubview:button];

score 16 · Accepted Answer

我在这里快速实现了这个功能：https ://github.com/anatoliyv/SMIconLabel

代码尽可能简单：

var labelLeft = SMIconLabel(frame: CGRectMake(10, 10, view.frame.size.width - 20, 20))
labelLeft.text = "Icon on the left, text on the left"

// Here is the magic
labelLeft.icon = UIImage(named: "Bell") // Set icon image
labelLeft.iconPadding = 5               // Set padding between icon and label
labelLeft.numberOfLines = 0             // Required
labelLeft.iconPosition = SMIconLabelPosition.Left // Icon position
view.addSubview(labelLeft)

这是它的外观：

SMIconLabel 图像

score 13 · Accepted Answer

Swift 4 UIlabel Extension 参考上述答案将图像添加到标签

extension UILabel {
  func set(image: UIImage, with text: String) {
    let attachment = NSTextAttachment()
    attachment.image = image
    attachment.bounds = CGRect(x: 0, y: 0, width: 10, height: 10)
    let attachmentStr = NSAttributedString(attachment: attachment)

    let mutableAttributedString = NSMutableAttributedString()
    mutableAttributedString.append(attachmentStr)

    let textString = NSAttributedString(string: text, attributes: [.font: self.font])
    mutableAttributedString.append(textString)

    self.attributedText = mutableAttributedString
  }
}

score 10 · Accepted Answer

Swift 5 Easy Way 只需 CopyPaste 并更改您想要的内容

let fullString = NSMutableAttributedString(string:"To start messaging contacts who have Talklo, tap ")

 // create our NSTextAttachment
let image1Attachment = NSTextAttachment() 
image1Attachment.image = UIImage(named: "chatEmoji")
image1Attachment.bounds = CGRect(x: 0, y: -8, width: 25, height: 25)

// wrap the attachment in its own attributed string so we can append it
let image1String = NSAttributedString(attachment: image1Attachment)

 // add the NSTextAttachment wrapper to our full string, then add some more text.

 fullString.append(image1String)
 fullString.append(NSAttributedString(string:" at the right bottom of your screen"))

 // draw the result in a label
 self.lblsearching.attributedText = fullString

score 4 · Accepted Answer

试试这个方法...

  self.lbl.text=@"Drawble Left";
    UIImageView *img=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 20, 20)];
    img.image=[UIImage imageNamed:@"Star.png"];
    [self.lbl addSubview:img];

score 4 · Accepted Answer

在 Swift 5 中，通过使用 UILabel 扩展在文本的开头和结尾嵌入图标，如下所示：-

extension UILabel {
    
    func addTrailing(image: UIImage, text:String) {
        let attachment = NSTextAttachment()
        attachment.image = image

        let attachmentString = NSAttributedString(attachment: attachment)
        let string = NSMutableAttributedString(string: text, attributes: [:])

        string.append(attachmentString)
        self.attributedText = string
    }
    
    func addLeading(image: UIImage, text:String) {
        let attachment = NSTextAttachment()
        attachment.image = image

        let attachmentString = NSAttributedString(attachment: attachment)
        let mutableAttributedString = NSMutableAttributedString()
        mutableAttributedString.append(attachmentString)
        
        let string = NSMutableAttributedString(string: text, attributes: [:])
        mutableAttributedString.append(string)
        self.attributedText = mutableAttributedString
    }
}

要在您想要的标签中使用上述代码：-

文本右侧的图像然后： -

statusLabel.addTrailing(image: UIImage(named: "rightTick") ?? UIImage(), text: " Verified ")

文本左侧的图像然后： -

statusLabel.addLeading(image: UIImage(named: "rightTick") ?? UIImage(), text: " Verified ")

输出：-

score 3 · Accepted Answer

尝试将 aUIView拖到 IB 的屏幕上。从那里您可以将 aUIImageView和UILabel拖入您刚刚创建的视图中。将属性检查器中的图像设置UIImageView为自定义项目符号图像（您必须通过将其拖到导航窗格中来将其添加到项目中），然后您可以在标签中写入一些文本。

score 3 · Accepted Answer

斯威夫特 2.0 版本：

//Get image and set it's size
let image = UIImage(named: "imageNameWithHeart")
let newSize = CGSize(width: 10, height: 10)

//Resize image
UIGraphicsBeginImageContextWithOptions(newSize, false, 0.0)
image?.drawInRect(CGRectMake(0, 0, newSize.width, newSize.height))
let imageResized = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()

//Create attachment text with image
var attachment = NSTextAttachment()
attachment.image = imageResized
var attachmentString = NSAttributedString(attachment: attachment)
var myString = NSMutableAttributedString(string: "I love swift ")
myString.appendAttributedString(attachmentString)
myLabel.attributedText = myString

score 2 · Accepted Answer

如果需要，您可以扩展 UILbe 传递图像加载项前导或尾随的标志，还可以设置 imageBounds。

斯威夫特 5+

extension UILabel {
    func add(image: UIImage, text: String, isLeading: Bool = true, imageBounds: CGRect = CGRect(x: 0, y: 0, width: 16, height: 12)) {
        let imageAttachment = NSTextAttachment()
        imageAttachment.bounds = imageBounds
        
        imageAttachment.image = image
        
        let attachmentString = NSAttributedString(attachment: imageAttachment)
        let string = NSMutableAttributedString(string: text)
        
        let mutableAttributedString = NSMutableAttributedString()
        
        if isLeading {
            mutableAttributedString.append(attachmentString)
            mutableAttributedString.append(string)
            attributedText = mutableAttributedString
        } else {
            string.append(attachmentString)
            attributedText = string
        }
    }
    }

score 1 · Accepted Answer

您必须在使用 a 的地方制作一个自定义对象，UIView并在其中放置 aUIImageView和 aUILabel

score 1 · Accepted Answer

您可以将UITextField与leftView属性一起使用，然后将该enabled属性设置为NO

或使用UIButton和setImage:forControlState

score 1 · Accepted Answer

对于希望在标签右端有一个图标的人，不一定紧跟在文本之后，您可以根据此答案中的想法使用此技术：https ://stackoverflow.com/a/19318843/826946 （请注意，这里有一些常量您可能需要调整，但总体思路应该很清楚）。如果您的标签使用其隐式大小调整大小，这将不起作用，只有当您对宽度有一些其他限制并且您确信会为您的图标留出空间时。

    let imgView = UIImageView(frame: CGRect(x: 0, y: 0, width: 20, height: 20))
    imgView.image = UIImage(named: "arrow")
    myLabel.addSubview(imgView)
    imgView.translatesAutoresizingMaskIntoConstraints = false
    imgView.centerYAnchor.constraint(equalTo: myLabel.centerYAnchor, constant: 0).isActive = true
    imgView.rightAnchor.constraint(equalTo: myLabel.rightAnchor, constant: -20).isActive = true

score 1 · Accepted Answer

 func atributedLabel(str: String, img: UIImage)->NSMutableAttributedString
{   let iconsSize = CGRect(x: 0, y: -2, width: 16, height: 16)
    let attributedString = NSMutableAttributedString()
    let attachment = NSTextAttachment()
    attachment.image = img
    attachment.bounds = iconsSize
    attributedString.append(NSAttributedString(attachment: attachment))
    attributedString.append(NSAttributedString(string: str))

    return attributedString
}

您可以使用此功能将图像或小图标添加到标签

score 0 · Accepted Answer

Swift 3 UILabel 扩展

提示：如果您需要在图像和文本之间留出一些空格，只需在 labelText 之前使用一两个空格即可。

extension UILabel {
    func addIconToLabel(imageName: String, labelText: String, bounds_x: Double, bounds_y: Double, boundsWidth: Double, boundsHeight: Double) {
        let attachment = NSTextAttachment()
        attachment.image = UIImage(named: imageName)
        attachment.bounds = CGRect(x: bounds_x, y: bounds_y, width: boundsWidth, height: boundsHeight)
        let attachmentStr = NSAttributedString(attachment: attachment)
        let string = NSMutableAttributedString(string: "")
        string.append(attachmentStr)
        let string2 = NSMutableAttributedString(string: labelText)
        string.append(string2)
        self.attributedText = string
    }
}

score 0 · Accepted Answer

在 Swift 2.0 中，

我对这个问题的解决方案是结合这个问题的几个答案。我在@Phil 的回答中遇到的问题是我无法更改图标的位置，而且它总是出现在右上角。@anatoliy_v 的一个答案是，我无法调整要附加到字符串的图标大小。

为了让它对我有用，我首先做了一个pod 'SMIconLabel'然后创建了这个函数：

func drawTextWithIcon(labelName: SMIconLabel, imageName: String, labelText: String!,  width: Int, height: Int) {

        let newSize = CGSize(width: width, height: height)
        let image = UIImage(named: imageName)
        UIGraphicsBeginImageContextWithOptions(newSize, false, 0.0)
        image?.drawInRect(CGRectMake(0, 0, newSize.width, newSize.height))
        let imageResized = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()

        labelName.text = " \(labelText)"
        labelName.icon = imageResized
        labelName.iconPosition = .Left
    }

此解决方案不仅可以帮助您放置图像，还可以让您对图标大小和其他属性进行必要的更改。

谢谢你。

ios - 如何在 UILabel 中嵌入小图标

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