写本文的初衷：因为公司最近在研发自己的仓库管理系统，作为一个iOS屌丝，本来就不关事；但老大看我闲的蛋疼，就叫我去生成并打印一百多个仓库条形码，刚开始时候用网页的条形码生成工具生成，妈蛋！一百多个啊。。。一个一个生成，保存，你不知道对于程序员来说会死的！！所以打算用iOS写一个脚本，输入完条形码内容，一次性生成几十个条形码图片！
于是乎，开始了哥的网上大开搜。。。。。。。。。。。。。。。。
结论就是源码太少，解释更少啦！而且还没有条形码底部的文字说明！所以，就自己动手写咯！！！
实现：
一、生成条形码
直接上码啦：
func generateBarCode128(barCodeStr:String,barCodeSize:CGSize) ->UIImage? { //将传入的string转成nsstring，再编码 let stringData = barCodeStr.dataUsingEncoding(NSUTF8StringEncoding) //系统自带能生成的码 // CIAztecCodeGenerator 二维码 // CICode128BarcodeGenerator 条形码 // CIPDF417BarcodeGenerator // CIQRCodeGenerator 二维码 let qrFilter = CIFilter(name: "CICode128BarcodeGenerator") qrFilter?.setDefaults() qrFilter?.setValue(stringData, forKey: "inputMessage") let outputImage:CIImage? = qrFilter?.outputImage /* 生成的条形码需要对其进行消除模糊处理，本文提供两种方法消除模糊，其原理都是放大条码，但项目中需要在条码底部加上条码内容文字，使用其方法一会模糊并变小文字，所以使用方法二，需要各位去研究下原因哈。。。 */ // 消除模糊方法一 // let context = CIContext() // let cgImage = context.createCGImage(outputImage!, fromRect: outputImage!.extent) // let image = UIImage(CGImage: cgImage, scale: 1.0, orientation: UIImageOrientation.Up) // // // Resize without interpolating // let scaleRate:CGFloat = 20.0 // let resized = resizeImage(addText(image), quality: CGInterpolationQuality.None, rate: scaleRate) // 消除模糊方法二 let scaleX:CGFloat = barCodeSize.width/outputImage!.extent.size.width; // extent 返回图片的frame let scaleY:CGFloat = barCodeSize.height/outputImage!.extent.size.height; let resultImage = outputImage?.imageByApplyingTransform(CGAffineTransformScale(CGAffineTransformIdentity, scaleX, scaleY)) let image = UIImage.init(CIImage: resultImage!) return addText(image,textName: barCodeStr); }
二、对生成的条形码加上文字
//添加条形码下方文字 func addText(image:UIImage,textName:String) ->UIImage{ let size = CGSizeMake(image.size.width, image.size.height+30) UIGraphicsBeginImageContextWithOptions (size, false , 0.0 ); image.drawAtPoint(CGPointZero) // 获得一个位图图形上下文 let context = UIGraphicsGetCurrentContext (); CGContextDrawPath (context!, .Stroke ); //绘制文字 let barText:NSString = textName let textStyle = NSMutableParagraphStyle() textStyle.lineBreakMode = .ByWordWrapping textStyle.alignment = .Center barText.drawInRect(CGRectMake(0, image.size.height-4, size.width, 30), withAttributes: [NSFontAttributeName:UIFont.systemFontOfSize(18.0),NSBackgroundColorAttributeName:UIColor.clearColor(),NSParagraphStyleAttributeName:textStyle]) let image = UIGraphicsGetImageFromCurrentImageContext() UIGraphicsEndImageContext() return image }
三、最后一步：将加工过的条形码存入本地
//写入本地 func writeToLocal(image:UIImage,imgName:String) { let path = (NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true) as NSArray).objectAtIndex(0) let filePath = "\(path)/\(imgName).jpeg" // let fileurl = __stringToUrl(filePath) let imgData = UIImageJPEGRepresentation(image, 0) if imgData != nil { imgData!.writeToFile(filePath, atomically: true) print("写入成功！！") print("filePath=\(filePath)") } }
好了，方法都写好了，所以现在就用我们的代码生成几十张条形码吧！因为是将生成的条形码存入本地，所以跑这个应用需要用模拟器来跑，这样你就能用command+shift+G快捷键打开打印出来的文件路径啦！激动不？~~~
调用：
override func viewDidLoad() { super.viewDidLoad() barCodeNameArray = ["SN00000000001","SN00000000002","SN00000000003","SN00000000005","SN00000000006","SN00000000007","SN00000000008","SN00000000009","SN000000000010","SN00000000011","SN00000000012","SN00000000013","SN00000000014","SN00000000015","SN00000000015","SN00000000016","SN00000000017","SN00000000018","SN00000000019"] for codeName in barCodeNameArray { //异步生成条形码，并保存到本地 let queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0) dispatch_async(queue) { //生成条形码 let image = self.generateBarCode128(codeName,barCodeSize: self.barCodeSize) if image != nil { self.writeToLocal(image!,imgName: codeName) } } } }
是不是很简单？不信？那你看我代码包：https://files.cnblogs.com/files/justAg/TestCreatBarCode.zip
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