92 lines
3.4 KiB
Swift
92 lines
3.4 KiB
Swift
import CoreImage
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import UIKit
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import Foundation
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import SwiftUICore
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public class QR{
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static func imageToBase64(_ image: UIImage) -> String {
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if let imageData = image.jpegData(compressionQuality: 1.0) {
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// 使用imageData进行你的操作
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let base64String = imageData.base64EncodedString(options: [])
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return base64String
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}
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return "";
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}
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static func createQrCode(_ data:String,_ size:Int)->String{
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// 使用示例
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var b:CGFloat=CGFloat(size);
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guard let qrCodeImage = QR.generateQRCode(with:data, qrSize: b)
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else{
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return "";
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}
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let q = QR.imageToBase64(qrCodeImage)
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return q
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}
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static func createQrCodeWithLogo(_ data:String,_ size:Int,_ logo: String,_ logoW:Int,_ logoH:Int)->String{
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// 使用示例
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var b:CGFloat=CGFloat(size);
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var w:CGFloat=CGFloat(logoW);
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var h:CGFloat=CGFloat(logoH);
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var logoSize:CGSize=CGSize(width: w, height: h)
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guard let qrCodeImage = QR.generateQRCode(with:data,logoName:logo, logoSize:logoSize, qrSize: b)
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else{
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return "";
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}
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let q = QR.imageToBase64(qrCodeImage)
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return q
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}
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// 生成二维码图像，并可选地添加logo
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static func generateQRCode(with content: String, logoName: String? = nil, logoSize: CGSize = CGSize(width: 50, height: 50), qrSize: CGFloat = 200) -> UIImage? {
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// 1. 生成二维码
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guard let qrFilter = CIFilter(name: "CIQRCodeGenerator") else { return nil }
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let data = content.data(using: .utf8)
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qrFilter.setValue(data, forKey: "inputMessage")
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qrFilter.setValue("H", forKey: "inputCorrectionLevel") // 高纠错级别
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guard let qrImage = qrFilter.outputImage else { return nil }
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// 2. 调整二维码尺寸
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let scaleTransform = CGAffineTransform(scaleX: qrSize / qrImage.extent.size.width, y: qrSize / qrImage.extent.size.height)
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let scaledQrImage = qrImage.transformed(by: scaleTransform)
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// 3. 创建UIImage对象
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guard let qrUIImage:UIImage? = UIImage(ciImage: scaledQrImage) else { return nil }
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// if let image: UIImage? = someFunctionThatReturnsUIImage() {
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// // 这里image已经被解包，并且是非空的
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// } else {
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// // 处理image为nil的情况
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// }
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// 4. 添加logo（如果有）
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if let logoName = logoName, let logoImage = UIImage(named: logoName) {
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let logoFrame = CGRect(x: (qrUIImage!.size.width - logoSize.width) / 2,
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y: (qrUIImage!.size.height - logoSize.height) / 2,
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width: logoSize.width,
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height: logoSize.height)
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UIGraphicsBeginImageContextWithOptions(qrUIImage!.size, false, 0.0)
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qrUIImage?.draw(in: CGRect(origin: .zero, size: qrUIImage!.size))
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logoImage.draw(in: logoFrame)
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let finalImage = UIGraphicsGetImageFromCurrentImageContext()
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UIGraphicsEndImageContext()
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return finalImage
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}
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// 如果没有logo，直接返回二维码图像
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return qrUIImage
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}
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} |