iOS文件操作(笔记)

2019-08-27  本文已影响0人  车在路上爬fly
1.检查文件是否存在
   NSFileManager *fileManager = [NSFileManager defaultManager];
   //Get documents directory
   NSArray *directoryPaths = NSSearchPathForDirectoriesInDomains
   (NSDocumentDirectory, NSUserDomainMask, YES);
   NSString *documentsDirectoryPath = [directoryPaths objectAtIndex:0];
   if ([fileManager fileExistsAtPath:@""]==YES) {
        NSLog(@"File exists");
    } 

2.比较两个文件的内容
   if ([fileManager contentsEqualAtPath:@"FilePath1" andPath:@" FilePath2"]) {
      NSLog(@"Same content");
   }

3.检查是否可写、可读、可执行文件
//检查是否可写
  if ([fileManager isWritableFileAtPath:@"FilePath"]) {
      NSLog(@"isWritable");
   }
//检查是否可读
   if ([fileManager isReadableFileAtPath:@"FilePath"]) {
      NSLog(@"isReadable");
   }
//检查是否可执行
   if ( [fileManager isExecutableFileAtPath:@"FilePath"]){
      NSLog(@"is Executable");
   }

4.移动文件
   if([fileManager moveItemAtPath:@"FilePath1" 
   toPath:@"FilePath2" error:NULL]){
      NSLog(@"Moved successfully");
   }
5.复制文件
   if ([fileManager copyItemAtPath:@"FilePath1" 
   toPath:@"FilePath2"  error:NULL]) {
      NSLog(@"Copied successfully");
   }
6.删除文件
if ([fileManager removeItemAtPath:@"FilePath" error:NULL]) {
      NSLog(@"Removed successfully");
   }
7.读取文件
 NSData *data = [fileManager contentsAtPath:@"Path"];
8.写入文件
[fileManager createFileAtPath:@"" contents:data attributes:nil];

Swift&OC 文件夹和文件的详细操作

在iOS开发我们会遇到文件、音频、视频等等下载后本地存储的情况,这时对读文件,写文件就显得很重要,对文件夹以及文件中的文件的操作,这时就可以使用NSFileManager(FileManager)或NSFileHandle(FileHandle)来实现。下面会用OC和Swift的对比来实现对文件和文件夹的操作

一、沙盒以及组成部分

iOS应用程序只能对自己创建的文件系统读取文件,这个"独立","封闭","安全"的空间,称之为沙盒。

1.1、Home目录(应用程序包)
1.2、Documents
1.3、tmp
1.4、Library/Cache
1.5、Library/Preference
1.6.程序.app,与另三个路径的父路径不同

二、对文件以及文件夹的操作

2.1、获取各个目录的路径

2.1.1、HomeDirectory
OC:                
NSString *filePath = NSHomeDirectory();
Swift:
let homePath = NSHomeDirectory()
2.1.2、Documents
OC:                
方法一
NSString * documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES) objectAtIndex:0]; 
方法二
NSString * documentsPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
Swift:
方法1
let documentsPaths = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)
let documentsPath = documentPaths[0]
方法2
let documentsPath = NSHomeDirectory()+"/Documents"
2.1.3、Caches
OC:  
方法一
NSString *cachesPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0];
方法二
NSString *cachesPath= [NSHomeDirectory() stringByAppendingPathComponent:@"/Library/Caches"];             
Swift:
方法1
let cachePaths = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.cachesDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)
let cachePath = cachePaths.last
方法2
let cachePath = NSHomeDirectory()+"/Library/Caches"
2.1.4、Library
OC:  
方法一
NSString * libraryPath = [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES) objectAtIndex:0];
方法二
NSString * libraryPath = [NSHomeDirectory() stringByAppendingPathComponent:@"/Library"];
Swift:
方法1
let libraryPaths = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.libraryDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)
let libraryPath = libraryPaths[0]
方法2
let libraryPath = NSHomeDirectory()+"/Library"

2.1.5、tmp
OC:  
方法一
NSString *tempPath = NSTemporaryDirectory();
方法二
NSString * tempPath = [NSHomeDirectory() stringByAppendingPathComponent:@"/tmp"];
Swift:
方法1
let tempPath = NSTemporaryDirectory()
方法2
let tempPath = NSHomeDirectory()+"/tmp"

2.2、根据传件来的路径创建文件夹 创建文件目录(蓝色的,文件夹和文件是不一样的)

应用程序目录, Caches、Library、Documents目录文件夹下创建文件夹(蓝色的)

下面以Documents为例创建JKFile为例

NSString *filePath=[NSHomeDirectory() stringByAppendingPathComponent:@"Documents/JKFile"];
- (NSString *)jKCreateDir:folderName{
 
    NSString *filePath=[NSHomeDirectory() stringByAppendingPathComponent: folderName];
    NSFileManager *fileManager = [NSFileManager defaultManager];
    BOOL isDir = NO;
    // fileExistsAtPath 判断一个文件或目录是否有效,isDirectory判断是否一个目录
    BOOL existed = [fileManager fileExistsAtPath:filePath isDirectory:&isDir];
 
    if ( !(isDir == YES && existed == YES) ) {
 
      // 不存在的路径才会创建
      [fileManager createDirectoryAtPath:filePath withIntermediateDirectories:YES attributes:nil error:nil];
    }
  return filePath;
}
let jKFilePath = NSHomeDirectory() + "/Documents/JKFile";
func jKCreateFolder(folderName: NSString) -> NSString {
   let fileManager: FileManager = FileManager.default
   let filePath = "\(folderName)"
   let exist = fileManager.fileExists(atPath: filePath)
   // 不存在的路径才会创建
   if (!exist) {
 
    //withIntermediateDirectories为ture表示路径中间如果有不存在的文件夹都会创建
    try! fileManager.createDirectory(atPath: filePath,withIntermediateDirectories: true, attributes: nil)
    }
  return filePath as NSString
 }

2.3、删除文件夹(先判断文件夹存不存在)

NSString *filePath=[NSHomeDirectory() stringByAppendingPathComponent:@"Documents/JKFile"];
- (void)jKRemovefolder:(NSString *)filePathName {
    // filePath: 文件/目录的路径
 
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSString *filePath = [NSString stringWithFormat:@"%@",filePathName];
    BOOL isDir = NO;
    // fileExistsAtPath 判断一个文件或目录是否有效,isDirectory判断是否一个目录
    BOOL existed = [fileManager fileExistsAtPath:filePath isDirectory:&isDir];
 
    if ( !(isDir == YES && existed == YES) ) {
      // 不存在的路径才会创建
      return;
    }
   //文件夹
   [fileManager removeItemAtPath:filePath error:nil];
}
let jKFilePath = NSHomeDirectory() + "/Documents/JKFile";
func jKRemovefolder(folderName: NSString){
   let fileManager: FileManager = FileManager.default
   let filePath = "\(folderName)"
   let exist = fileManager.fileExists(atPath: filePath)
   // 查看文件夹是否存在,如果存在就直接读取,不存在就直接反空
   if (exist) {
     
      try! fileManager.removeItem(atPath: filePath)
     
   }else{
     
     // 不存在就不做什么操作了
   }
}

2.4、删除文件

- (void)jKRemovefile:(NSString *)filePathName {
     // filePath: 文件/目录的路径
     NSFileManager *fileManager = [NSFileManager defaultManager];
     NSString *filePath = [NSString stringWithFormat:@"%@",filePathName];
    //移除文件
   [fileManager removeItemAtPath:filePath error:nil];
}

func jKRemovefile(folderName: NSString){
   let fileManager: FileManager = FileManager.default
   let filePath = "\(folderName)"
   //移除文件
   try! fileManager.removeItem(atPath: filePath)
 }

2.5、深度遍历(搜索文件夹)

2.5.1、深度搜索遍历一(subpathsAtPath)深度遍历,会递归遍历子文件夹(包括符号链接,所以要求性能的话用enumeratorAtPath)
NSString *filePath = NSHomeDirectory();
-(NSArray *)jKGetAllFileNames:(NSString *)folderName
{
  NSFileManager *fileManager = [NSFileManager defaultManager];
  // 取得一个目录下得所有文件名
  NSArray *files = [fileManager subpathsAtPath:[self jKCreateFolder:folderName]];
  //NSLog(@"pdf名字的数量=%ld 数组=%@",files.count,files);
 
  return files;
}
let jKFilePath = NSHomeDirectory();
func jKGetAllFileNames(folderName: NSString) -> NSArray{
 
  let filePath = "\(folderName)"
  let exist = fileManager.fileExists(atPath: filePath)
  // 查看文件夹是否存在,如果存在就直接读取,不存在就直接反空
  if (exist) {
     let subPaths = fileManager.subpaths(atPath: folderName as String)
      return subPaths! as NSArray
  }else{
      return []
  }
}
2.5.2、深度遍历二,会递归遍历子文件夹(但不会递归符号链接)
// folderNmae:文件夹的名字
-(NSArray *)jKDeepSearchEnumeratorAllFileNames:(NSString *)folderName{
 
    NSFileManager *fileManager = [NSFileManager defaultManager];
    // 取得一个目录下得所有文件名
    NSDirectoryEnumerator *files = [fileManager enumeratorAtPath:[self jKCreateFolder:folderName]];
    //NSLog(@"pdf名字的数量=%ld 数组=%@",files.count,files);
    return files.allObjects;
 }
func jKDeepSearchAllFiles(folderName: NSString) -> NSArray
{
    let filePath = "\(folderName)"
    let exist = fileManager.fileExists(atPath: filePath)
    // 查看文件夹是否存在,如果存在就直接读取,不存在就直接反空
    if (exist) {
       let contentsOfPathArray = fileManager.enumerator(atPath: filePath)
       return contentsOfPathArray!.allObjects as NSArray
    }else{
       return []
    }
}

2.6、对指定路径执行浅搜索,返回指定目录路径下的文件、子目录及符号链接的列表(只寻找一层)

/**对指定路径执行浅搜索,返回指定目录路径下的文件、子目录及符号链接的列表(只寻找一层)*/
    
NSString *customPath = [NSString stringWithFormat:@"%@",[JKFilePathOperationExtension jKHomeDirectory]];
-(NSArray *)jKShallowSearchAllFiles:(NSString *)filePath{
 
     NSFileManager *fileManager = [NSFileManager defaultManager];
     NSArray *contentsOfPathArray = [fileManager contentsOfDirectoryAtPath:filePath error:nil];
     return contentsOfPathArray;
 }
/** 对指定路径执行浅搜索,读取指定目录路径下的文件、子目录及符号链接的列表(只寻找一层)*/
let jKFilePath = NSHomeDirectory()
func jKShallowSearchAllFiles(folderName: NSString) -> NSArray {
  
    let filePath = "\(folderName)"
    let contentsOfPathArray = try! fileManager.contentsOfDirectory(atPath: filePath);
    return contentsOfPathArray as NSArray
  
 }

2.7、判断文件或文件夹是否存在

+(BOOL)jkJudgeFileOrFolderExists:(NSString *)filePathName{
 
   NSFileManager *fileManager = [NSFileManager defaultManager];
   NSString *filePath = [NSString stringWithFormat:@"%@",filePathName];
   BOOL isDir = NO;
   // fileExistsAtPath 判断一个文件或目录是否有效,isDirectory判断是否一个目录
   BOOL existed = [fileManager fileExistsAtPath:filePath isDirectory:&isDir];
 
   if ( !(isDir == YES && existed == YES) ) {
 
        // 不存在的路径
        return NO;
   }else{
 
       return YES;
   }
  return nil;
}
func jkJudgeFileOrFolderExists(folderName: NSString) -> Bool
 {
    let filePath = "\(folderName)"
    let exist = fileManager.fileExists(atPath: filePath)
    // 查看文件夹是否存在,如果存在就直接读取,不存在就直接反空
    if (exist) {
       return true
    }else{
      return false
    }
 }

2.9、创建文件(如:动画乐园.text格式的文本文件)

/**folderNmae:文件的名字*/
- (NSString *)jKCreateFile:(NSString *)folderName{
 
    NSString *filePath = [NSString stringWithFormat:@"%@",folderName];
    NSFileManager *fileManager = [NSFileManager defaultManager];
    BOOL isDir = NO;
    // fileExistsAtPath 判断一个文件或目录是否有效,isDirectory判断是否一个目录
    BOOL existed = [fileManager fileExistsAtPath:filePath isDirectory:&isDir];
 
    if ( !(isDir == YES && existed == YES) ) {
   
         // 不存在的路径才会创建
         [fileManager createFileAtPath:filePath contents:nil attributes:nil];
     }
   return filePath;
}
// fileName:文件的名字(不是文件夹)
 // baseFilePath: 文件的基础路径
 // content: 存进文件的内容
 /** 根据传件来的路径创建文件*/
 func jKCreateFile(fileName: NSString,baseFilePath: NSString) -> (filePath: NSString,createStatus: Bool) {
   
   // NSHomeDirectory():应用程序目录
   let filePath = "\(baseFilePath)" + "/\(fileName)"
   let exist = fileManager.fileExists(atPath: filePath)
   // 不存在的文件路径才会创建
   if (!exist) {
       
       //withIntermediateDirectories为ture表示路径中间如果有不存在的文件夹都会创建
       let createSuccess = fileManager.createFile(atPath: filePath,contents:nil,attributes:nil)
       return (filePath as NSString,createSuccess as Bool)
       
    }
   return (filePath as NSString,true)
 }
2.10、可以通过write(to:)方法,可以创建文件并将对象(文件,音频,图片,视频以及数组,字典)都可以写入文件
2.10.1、把NSSString保存到上面“动画乐园.text”的文件里面
// 文件的路径(以文件存在为基础,创建文件请看2.9)
NSString * path = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/动画乐园.text"];
NSString *content = @"动画乐园欢迎你"
// 内容写入
[content writeToFile: path atomically:YES encoding:NSUTF8StringEncoding error:nil];

let path = NSHomeDirectory() + "/Documents/动画乐园.text"
let info = "动画乐园欢迎你" as String
try! info.write(toFile: path, atomically: true, encoding: String.Encoding.utf8)

2.10.2、把本地图片或者网络图片保存到上面“图片”的文件夹里面

filePath图片的路径是提前存在的(没有的话看上面的去创建文件夹)
把本地图片或者网络图片保存到上面“图片”的文件夹里面

// 本地图片的名字
NSString *imageString = @"testimage.png";
UIImage *image = [UIImage imageNamed:imageString];
NSData *data = UIImagePNGRepresentation(image);
// 图片的存储文件夹
NSString *customPath = [NSString stringWithFormat:@"%@%@",NSHomeDirectory(),@"/Documents/图片"];
// 图片的存储路径
imagePath = [NSString stringWithFormat:@"%@/%@", customPath, imageString];
[data writeToFile: imagePath atomically:YES];
网络图片
NSString *imageStr = @"http://images.ciotimes.com/o_1can10mm91sd91c6n1thv15oel8g9.png";
NSString *customPath = [NSString stringWithFormat:@"%@/%@",[JKFilePathOperationExtension jKDocuments],@"jk.png"];
NSData *data = [NSData dataWithContentsOfURL:[NSURL  URLWithString:imageStr]];
//转换为图片保存到以上的沙盒路径中
UIImage * currentImage = [UIImage imageWithData:data];
//其中参数0.5表示压缩比例,1表示不压缩,数值越小压缩比例越大
[UIImageJPEGRepresentation(currentImage, 0.5) writeToFile:customPath  atomically:YES];
let filePath = NSHomeDirectory() + "/Documents/图片/testimage.png"
let image = UIImage(named: "testimage.png")
let data:Data = UIImagePNGRepresentation(image!)!
try? data.write(to: URL(fileURLWithPath: filePath))
2.10.3、把本数组写到文件里面(array.plist的文件是已经存在的基础上)
// 创建数组
NSArray  *array = @[@"1",@"2",@"3"];
// 文件路径(前提是已经存在),创建文件请看上面2.9
NSString *customPath = [NSString stringWithFormat:@"%@%@",NSHomeDirectory(),@"/Documents/array.plist"];
[array writeToFile:filePath atomically:YES];
let filePath = NSHomeDirectory() + "/Documents/array.plist"
let array = NSArray(objects: "我","❤️","你")
array.write(toFile: filePath, atomically: true)
2.10.4、把本字典写到文件里面(dictionary.plist的文件是已经存在的基础上)
NSString *customPath = [NSString stringWithFormat:@"%@%@",NSHomeDirectory(),@"/Documents/dictionary.plist"];
// 创建字典
NSDictionary *dict = @{@"1":@"9",@"2":@"8",@"3":@"7",@"4":@"6"};
dict.write(toFile: filePath, atomically: true)

-Swift

let filePath = NSHomeDirectory() + "/Documents/dictionary.plist"
let dictionary = NSDictionary(dictionary: ["name":"JK","age":"26"])
dictionary.write(toFile: filePath, atomically: true)

2.11、复制文件

NSString *fromPath = [NSString stringWithFormat:@"%@%@",NSHomeDirectory(),@"/Documents/我的笔记.text"];
 NSString *toPath = [NSString stringWithFormat:@"%@%@",NSHomeDirectory(),@"/Documents/复制后的笔记.text"];
 NSFileManager *fileManager = [NSFileManager defaultManager];
 BOOL isCopySuccess = [fileManager copyItemAtPath: fromPath toPath: toPath error:nil];
let homeDirectory = NSHomeDirectory()
 let fomePath = homeDirectory + "/Documents/我的笔记.text"
 let toPath = homeDirectory + "/Documents/复制后的笔记.text"
 let fileManager1 = FileManager.default
 try! fileManager1.copyItem(atPath: fomePath as String, toPath: toPath as String)

2.12、移动文件或者文件夹

文件夹或者文件,这里是文件夹JKPdf要提前建好,创建方式看上面

NSString *fromPath = [NSString stringWithFormat:@"%@%@",NSHomeDirectory(),@"/Documents/JKPdf"];
NSString *toPath = [NSString stringWithFormat:@"%@%@",NSHomeDirectory(),@"/tmp/JKPdf"];
NSFileManager *fileManager = [NSFileManager defaultManager];
BOOL isMoveSuccess = [fileManager moveItemAtPath:fromPath toPath:toPath error:nil];
let fomePath =NSHomeDirectory()  + "/Documents/JKPdf"
let toPath =  NSHomeDirectory()  + "/tmp/JKPdf"
let fileManagerMove = FileManager.default
try! fileManagerMove.moveItem(atPath: fromUrl as String, toPath: toUrl as String)

2.13、读取文件

2.13.1、文件的类型为文本,如 我的笔记.text
// 拿到我的笔记.text的路径
 NSString *customPath = @"路径";
 // 取出文本的内容
 NSString *str = [NSString stringWithContentsOfFile:customPath encoding:NSUTF8StringEncoding error:nil];

let path = NSHomeDirectory() + "/Documents/我的笔记.text"
 let readHandler =  FileHandle(forReadingAtPath: path)
 let data = readHandler?.readDataToEndOfFile()
 let readString = String(data: data!, encoding: String.Encoding.utf8)
 print("文件内容: \(String(describing: readString))")

2.13.2、读取沙盒图片

模仿SDWebImage: 加载图片前先去沙盒寻找,如果有就加载沙盒里的图片,没有的话就加载网络的图片

/** 读出图片 imageUrl: 图片的链接*/
+(void)jKReadImageWithImageUrl:(NSString *)imageUrl withReadImage:(ReadImage)readImage{
 
   NSString *catchsImageStr = [imageUrl lastPathComponent];
   NSFileManager *fileManager = [NSFileManager defaultManager];
   NSString *filePath = [NSString stringWithFormat:@"%@/Library/Caches/JKImage/%@",NSHomeDirectory(),catchsImageStr];
 
   // fileExistsAtPath 判断一个文件或目录是否有效
   BOOL existed = [fileManager fileExistsAtPath:filePath];
 
   if ( !(existed == YES) ) {
      // 图片不存在沙盒里,检查文件夹是否存在 
      NSString *folderPath = [NSString stringWithFormat:@"%@/Library/Caches/JKImage",NSHomeDirectory()];
      BOOL isDir = NO;
      // fileExistsAtPath 判断一个文件或目录是否有效,isDirectory判断是否一个目录
      BOOL existedFolder = [fileManager fileExistsAtPath:folderPath isDirectory:&isDir];
      if ( !(isDir == YES && existedFolder == YES) ) {
 
          // 不存在的文件夹JKImage才会创建
          [fileManager createDirectoryAtPath:folderPath withIntermediateDirectories:YES attributes:nil error:nil];
      }
 
     // 文件夹存在就把图片缓存进去
     // 图片不存在
     NSData *data = [NSData dataWithContentsOfURL:[NSURL  URLWithString:imageUrl]];
     //转换为图片保存到以上的沙盒路径中
     UIImage * currentImage = [UIImage imageWithData:data];
     //其中参数0.5表示压缩比例,1表示不压缩,数值越小压缩比例越大
     [UIImageJPEGRepresentation(currentImage, 0.5) writeToFile:[NSString stringWithFormat:@"%@/%@",folderPath,catchsImageStr] atomically:YES];
     readImage(currentImage,YES);
 
   }else{
 
      // 图片在沙盒里直接取出
      NSData *data = [NSData dataWithContentsOfFile:filePath];
      UIImage *image = [UIImage imageWithData:data];
      readImage(image,YES);
   }
 }

 let path = NSHomeDirectory() + "/Documents/2.png"
 let fileManagerReadImage = FileManager.default
 let exist = fileManagerReadImage.fileExists(atPath: path)
 // 不存在直接返回false
 if (!exist) {
    
     print("存在图片")
 }else{
    
    let readHandler =  FileHandle(forReadingAtPath: path)
    let data = (readHandler?.readDataToEndOfFile())!
    let image = UIImage(data: data)
   
    print("不存在图片")
 }

2.14、获取文件属性(创建时间,修改时间,文件大小,文件类型等信息)

let docPath = NSHomeDirectory() + "/Documents/我的笔记.text"
NSFileManager *fileManager = [NSFileManager defaultManager];
NSDictionary *fileAttributes = [fileManager attributesOfItemAtPath:path error:nil];
 
if (fileAttributes != nil) {
   NSNumber *fileSize;
   NSString *fileOwner, *creationDate;
   NSDate *fileModDate;
   //NSString *NSFileCreationDate
   //文件大小
   if ((fileSize = [fileAttributes objectForKey:NSFileSize])) {
    
      NSLog(@"文件的大小= %qi\n", [fileSize unsignedLongLongValue]);
   }
   //文件创建日期
   if ((creationDate = [fileAttributes objectForKey:NSFileCreationDate])) {
    
      NSLog(@"文件创建的日期: %@\n", creationDate);
   }
   //文件所有者
   if ((fileOwner = [fileAttributes objectForKey:NSFileOwnerAccountName])) {
   
      NSLog(@"Owner: %@\n", fileOwner);
    }
    //文件修改日期
    if ((fileModDate = [fileAttributes objectForKey:NSFileModificationDate])) {
    
       NSLog(@"文件修改的日期: %@\n", fileModDate);
    }
}else {
     NSLog(@"该文件不存在");
}
// 我的笔记.text文本是存在Documents下面的
let path = NSHomeDirectory() + "/Documents/我的笔记.text"
let managerGetFile = FileManager.default
let attributes = try? managerGetFile.attributesOfItem(atPath: path) //结果为Dictionary类型
print("创建时间:\(attributes[FileAttributeKey.creationDate]!)")
print("修改时间:\(attributes[FileAttributeKey.modificationDate]!)")
print("文件大小:\(attributes[FileAttributeKey.size]!)")

2.15、计算单个或多个文件夹的大小(清理数据常用)

/** 计算文件夹的大小 folderPath: 文件夹的大小*/
-(NSString *)jKCalculateTheSizeOfTheFolderPath:(NSString *)folderPath{
 
   NSFileManager *fileManager = [NSFileManager defaultManager];
   BOOL isExist = [fileManager fileExistsAtPath:folderPath];
   if (isExist) {
 
       unsigned long long folderSize = 0;
       NSArray *childerFiles=[fileManager subpathsAtPath:folderPath];
 
       if (childerFiles.count != 0) {
    
            for (NSString *fileName in childerFiles) {
        
               NSString *fileAbsolutePath=[folderPath stringByAppendingPathComponent:fileName];
               folderSize +=[self jKCalculateTheSizeOfTheFilePath:fileAbsolutePath];
            }
       }else{
    
            folderSize = [self jKCalculateTheSizeOfTheFilePath:folderPath];
       }
 
      NSString *sizeString;
 
      if (folderSize >= 1024.0 * 1024.0) {
    
          sizeString = [NSString stringWithFormat:@"%.2fMB",folderSize / (1024.0 * 1024.0)];
      }else if (folderSize >= 1024.0){
    
          sizeString = [NSString stringWithFormat:@"%.fkb",folderSize / (1024.0)];
      }else{
    
          sizeString = [NSString stringWithFormat:@"%llub",folderSize];
      }
 
      // unsigned long long
      return sizeString;
 
   } else {
 
      NSLog(@"file is not exist");
      return @"0MB";
   }
}
 
/** 计算文件的大小*/
-(unsigned long long)jKCalculateTheSizeOfTheFilePath:(NSString *)filePath{
 
    NSFileManager *fileManager = [NSFileManager defaultManager];
    BOOL isExist = [fileManager fileExistsAtPath:filePath];
    if (isExist) {
        unsigned long long fileSize = [[fileManager attributesOfItemAtPath:filePath error:nil] fileSize];
        return fileSize;
    } else {
        NSLog(@"file is not exist");
        return 0;
    }
}

/** 计算文件夹或者文件的大小 */
class func getSize(folderPath: String)-> String
{
  if folderPath.count == 0 {
      return "0MB" as String
  }
  let manager = FileManager.default
  if !manager.fileExists(atPath: folderPath){
      return "0MB" as String
  }
  var fileSize:Float = 0.0
  do {
        let files = try manager.contentsOfDirectory(atPath: folderPath)
       
        for file in files {
           
          let path = folderPath + "/\(file)"
          fileSize = fileSize + fileSizeAtPath(filePath: path)
           
        }
      }catch{
          
          fileSize = fileSize + fileSizeAtPath(filePath: folderPath)
  }
   
  print("大小==\(fileSize)")
   
  var resultSize = ""
   
  if fileSize >= 1024.0*1024.0{
       
      resultSize = NSString(format: "%.2fMB", fileSize/(1024.0 * 1024.0)) as String
 
  }else if fileSize >= 1024.0{
       
      resultSize = NSString(format: "%.fkb", fileSize/(1024.0 )) as String
       
  }else{
       
      resultSize = NSString(format: "%llub", fileSize) as String
  }
 
  return resultSize
}
 
/**  计算单个文件或文件夹的大小 */
class func fileSizeAtPath(filePath:String) -> Float {
   
  let manager = FileManager.default
  var fileSize:Float = 0.0
  if manager.fileExists(atPath: filePath) {
      do {
          let attributes = try manager.attributesOfItem(atPath: filePath)
           
           if attributes.count != 0 {
               
              fileSize = attributes[FileAttributeKey.size]! as! Float
            }
         }catch{
       
         }
    }
   
   return fileSize;
}

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