zoukankan      html  css  js  c++  java
  • 最新swift4.0 图片进行尺寸大小及体积压缩

    ///图片压缩方法

       class func resetImgSize(sourceImage : UIImage,maxImageLenght : CGFloat,maxSizeKB : CGFloat) -> Data {

        var maxSize = maxSizeKB

        var maxImageSize = maxImageLenght

        

        if (maxSize <= 0.0) {

            maxSize = 1024.0;

        }

        if (maxImageSize <= 0.0)  {

            maxImageSize = 1024.0;

        }

        //先调整分辨率

        var newSize = CGSize.init( sourceImage.size.width, height: sourceImage.size.height)

        let tempHeight = newSize.height / maxImageSize;

        let tempWidth = newSize.width / maxImageSize;

        if (tempWidth > 1.0 && tempWidth > tempHeight) {

            newSize = CGSize.init( sourceImage.size.width / tempWidth, height: sourceImage.size.height / tempWidth)

        }

        else if (tempHeight > 1.0 && tempWidth < tempHeight){

            newSize = CGSize.init( sourceImage.size.width / tempHeight, height: sourceImage.size.height / tempHeight)

        }

        UIGraphicsBeginImageContext(newSize)

        sourceImage.draw(in: CGRect.init(x: 0, y: 0, newSize.width, height: newSize.height))

        let newImage = UIGraphicsGetImageFromCurrentImageContext()

        UIGraphicsEndImageContext()

        var imageData = UIImageJPEGRepresentation(newImage!, 1.0)

        var sizeOriginKB : CGFloat = CGFloat((imageData?.count)!) / 1024.0;

        //调整大小

        var resizeRate = 0.9;

        while (sizeOriginKB > maxSize && resizeRate > 0.1) {

            imageData = UIImageJPEGRepresentation(newImage!,CGFloat(resizeRate));

            sizeOriginKB = CGFloat((imageData?.count)!) / 1024.0;

            resizeRate -= 0.1;

        }

        return imageData!

       }

  • 相关阅读:
    Unity 3D第三人称视角、用途广泛限定角度(视角不能360度翻转)
    Android Studio安卓导出aar包与Unity 3D交互
    Unity 3D调用Windows打开、保存窗口、文件浏览器
    安卓与Unity交互之-Android Studio创建Module库模块教程
    Unity 3D与Android Studio安卓交互之-导出jar包
    C#字符串string以及相关内置函数
    Unity 3D委托entrust
    数据结构与算法学习一
    .NET Core学习一--Powered by .NET Core on Kubernetes
    easyui.form
  • 原文地址:https://www.cnblogs.com/qizhuo/p/8242589.html
Copyright © 2011-2022 走看看