沙盒路径、文件管理、清理缓存

794092-20160412225334582-792473503.png

文件操作类

//获取Document路径
+ (NSString *)getDocumentPath
{
    NSArray *filePaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    return [filePaths objectAtIndex:0];
}

//获取Library路径
+ (NSString *)getLibraryPath
{
    NSArray *filePaths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
    return [filePaths objectAtIndex:0];
}

//获取应用程序路径
+ (NSString *)getApplicationPath
{
    return NSHomeDirectory();
}

//获取Cache路径
+ (NSString *)getCachePath
{
    NSArray *filePaths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
    return [filePaths objectAtIndex:0];
}

//获取Temp路径
+ (NSString *)getTempPath
{
    return NSTemporaryDirectory();
}

//判断文件是否存在于某个路径中
+ (BOOL)fileIsExistOfPath:(NSString *)filePath
{
    BOOL flag = NO;
    NSFileManager *fileManager = [NSFileManager defaultManager];
    if ([fileManager fileExistsAtPath:filePath]) {
        flag = YES;
    } else {
        flag = NO;
    }
    return flag;
}

//从某个路径中移除文件
+ (BOOL)removeFileOfPath:(NSString *)filePath
{
    BOOL flag = YES;
    NSFileManager *fileManage = [NSFileManager defaultManager];
    if ([fileManage fileExistsAtPath:filePath]) {
        if (![fileManage removeItemAtPath:filePath error:nil]) {
            flag = NO;
        }
    }
    return flag;
}

//从URL路径中移除文件
- (BOOL)removeFileOfURL:(NSURL *)fileURL
{
    BOOL flag = YES;
    NSFileManager *fileManage = [NSFileManager defaultManager];
    if ([fileManage fileExistsAtPath:fileURL.path]) {
        if (![fileManage removeItemAtURL:fileURL error:nil]) {
            flag = NO;
        }
    }
    return flag;
}

//创建文件路径
+(BOOL)creatDirectoryWithPath:(NSString *)dirPath
{
    BOOL ret = YES;
    BOOL isExist = [[NSFileManager defaultManager] fileExistsAtPath:dirPath];
    if (!isExist) {
        NSError *error;
        BOOL isSuccess = [[NSFileManager defaultManager] createDirectoryAtPath:dirPath withIntermediateDirectories:YES attributes:nil error:&error];
        if (!isSuccess) {
            ret = NO;
            NSLog(@"creat Directory Failed. errorInfo:%@",error);
        }
    }
    return ret;
}

//创建文件
+ (BOOL)creatFileWithPath:(NSString *)filePath
{
    BOOL isSuccess = YES;
    NSFileManager *fileManager = [NSFileManager defaultManager];
    BOOL temp = [fileManager fileExistsAtPath:filePath];
    if (temp) {
        return YES;
    }
    NSError *error;
    //stringByDeletingLastPathComponent:删除最后一个路径节点
    NSString *dirPath = [filePath stringByDeletingLastPathComponent];
    isSuccess = [fileManager createDirectoryAtPath:dirPath withIntermediateDirectories:YES attributes:nil error:&error];
    if (error) {
        NSLog(@"creat File Failed. errorInfo:%@",error);
    }
    if (!isSuccess) {
        return isSuccess;
    }
    isSuccess = [fileManager createFileAtPath:filePath contents:nil attributes:nil];
    return isSuccess;
}

//保存文件
+ (BOOL)saveFile:(NSString *)filePath withData:(NSData *)data
{
    BOOL ret = YES;
    ret = [self creatFileWithPath:filePath];
    if (ret) {
        ret = [data writeToFile:filePath atomically:YES];
        if (!ret) {
            NSLog(@"%s Failed",__FUNCTION__);
        }
    } else {
        NSLog(@"%s Failed",__FUNCTION__);
    }
    return ret;
}

//追加写文件
+ (BOOL)appendData:(NSData *)data withPath:(NSString *)path
{
    BOOL result = [self creatFileWithPath:path];
    if (result) {
        NSFileHandle *handle = [NSFileHandle fileHandleForWritingAtPath:path];
        [handle seekToEndOfFile];
        [handle writeData:data];
        [handle synchronizeFile];
        [handle closeFile];
        return YES;
    } else {
        NSLog(@"%s Failed",__FUNCTION__);
        return NO;
    }
}

//获取文件
+ (NSData *)getFileData:(NSString *)filePath
{
    NSFileHandle *handle = [NSFileHandle fileHandleForReadingAtPath:filePath];
    NSData *fileData = [handle readDataToEndOfFile];
    [handle closeFile];
    return fileData;
}

//读取文件
+ (NSData *)getFileData:(NSString *)filePath startIndex:(long long)startIndex length:(NSInteger)length
{
    NSFileHandle *handle = [NSFileHandle fileHandleForReadingAtPath:filePath];
    [handle seekToFileOffset:startIndex];
    NSData *data = [handle readDataOfLength:length];
    [handle closeFile];
    return data;
}

//移动文件
+ (BOOL)moveFileFromPath:(NSString *)fromPath toPath:(NSString *)toPath
{
    NSFileManager *fileManager = [NSFileManager defaultManager];
    if (![fileManager fileExistsAtPath:fromPath]) {
        NSLog(@"Error: fromPath Not Exist");
        return NO;
    }
    if (![fileManager fileExistsAtPath:toPath]) {
        NSLog(@"Error: toPath Not Exist");
        return NO;
    }
    NSString *headerComponent = [toPath stringByDeletingLastPathComponent];
    if ([self creatFileWithPath:headerComponent]) {
        return [fileManager moveItemAtPath:fromPath toPath:toPath error:nil];
    } else {
        return NO;
    }
}

//拷贝文件
+(BOOL)copyFileFromPath:(NSString *)fromPath toPath:(NSString *)toPath
{
    NSFileManager *fileManager = [NSFileManager defaultManager];
    if (![fileManager fileExistsAtPath:fromPath]) {
        NSLog(@"Error: fromPath Not Exist");
        return NO;
    }
    if (![fileManager fileExistsAtPath:toPath]) {
        NSLog(@"Error: toPath Not Exist");
        return NO;
    }
    NSString *headerComponent = [toPath stringByDeletingLastPathComponent];
    if ([self creatFileWithPath:headerComponent]) {
        return [fileManager copyItemAtPath:fromPath toPath:toPath error:nil];
    } else {
        return NO;
    }
}

//获取文件夹下文件列表
+ (NSArray *)getFileListInFolderWithPath:(NSString *)path
{
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSError *error;
    NSArray *fileList = [fileManager contentsOfDirectoryAtPath:path error:&error];
    if (error) {
        NSLog(@"getFileListInFolderWithPathFailed, errorInfo:%@",error);
    }
    return fileList;
}

//获取文件大小
+ (long long)getFileSizeWithPath:(NSString *)path
{
    unsigned long long fileLength = 0;
    NSNumber *fileSize;
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSDictionary *fileAttributes = [fileManager attributesOfItemAtPath:path error:nil];
    if ((fileSize = [fileAttributes objectForKey:NSFileSize])) {
        fileLength = [fileSize unsignedLongLongValue]; //单位是 B
    }
    return fileLength / 1000; 换算为K
}

//获取文件创建时间
+ (NSString *)getFileCreatDateWithPath:(NSString *)path
{
    NSString *date = nil;
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSDictionary *fileAttributes = [fileManager attributesOfItemAtPath:path error:nil];
    date = [fileAttributes objectForKey:NSFileCreationDate];
    return date;
}

//获取文件所有者
+ (NSString *)getFileOwnerWithPath:(NSString *)path
{
    NSString *fileOwner = nil;
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSDictionary *fileAttributes = [fileManager attributesOfItemAtPath:path error:nil];
    fileOwner = [fileAttributes objectForKey:NSFileOwnerAccountName];
    return fileOwner;
}

//获取文件更改日期
+ (NSString *)getFileChangeDateWithPath:(NSString *)path
{
    NSString *date = nil;
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSDictionary *fileAttributes = [fileManager attributesOfItemAtPath:path error:nil];
    date = [fileAttributes objectForKey:NSFileModificationDate];
    return date;
}
--------------------- 
作者：Stevin的技术博客 
来源：CSDN 
原文：https://blog.csdn.net/feng2qing/article/details/54974200 
版权声明：本文为博主原创文章，转载请附上博文链接！!

清理缓存

ClearCacheTool.h文件

#import <Foundation/Foundation.h>
 
@interface ClearCacheTool : NSObject
 
/*s*
 *  获取path路径下文件夹的大小
 *
 *  @param path 要获取的文件夹 路径
 *
 *  @return 返回path路径下文件夹的大小
 */
+ (NSString *)getCacheSizeWithFilePath:(NSString *)path;
 
/**
 *  清除path路径下文件夹的缓存
 *
 *  @param path  要清除缓存的文件夹 路径
 *
 *  @return 是否清除成功
 */
+ (BOOL)clearCacheWithFilePath:(NSString *)path;

ClearCacheTool.m文件

#import "ClearCacheTool.h"
 
@implementation ClearCacheTool
 
#pragma mark - 获取path路径下文件夹大小
+ (NSString *)getCacheSizeWithFilePath:(NSString *)path{
 
    // 获取“path”文件夹下的所有文件
    NSArray *subPathArr = [[NSFileManager defaultManager] subpathsAtPath:path];
 
    NSString *filePath  = nil;
    NSInteger totleSize = 0;
 
    for (NSString *subPath in subPathArr){
 
        // 1. 拼接每一个文件的全路径
        filePath =[path stringByAppendingPathComponent:subPath];
        // 2. 是否是文件夹，默认不是
        BOOL isDirectory = NO;
        // 3. 判断文件是否存在
        BOOL isExist = [[NSFileManager defaultManager] fileExistsAtPath:filePath isDirectory:&isDirectory];
 
        // 4. 以上判断目的是忽略不需要计算的文件
        if (!isExist || isDirectory || [filePath containsString:@".DS"]){
            // 过滤: 1. 文件夹不存在  2. 过滤文件夹  3. 隐藏文件
            continue;
        }
        // 5. 指定路径，获取这个路径的属性
        NSDictionary *dict = [[NSFileManager defaultManager] attributesOfItemAtPath:filePath error:nil];
        /**
         attributesOfItemAtPath: 文件夹路径
         该方法只能获取文件的属性, 无法获取文件夹属性, 所以也是需要遍历文件夹的每一个文件的原因
         */
        // 6. 获取每一个文件的大小
        NSInteger size = [dict[@"NSFileSize"] integerValue];
        // 7. 计算总大小
        totleSize += size;
    }
    //8. 将文件夹大小转换为 M/KB/B
    NSString *totleStr = nil;
    if (totleSize > 1000 * 1000){
        totleStr = [NSString stringWithFormat:@"%.2fM",totleSize / 1000.00f /1000.00f];
    }else if (totleSize > 1000){
        totleStr = [NSString stringWithFormat:@"%.2fKB",totleSize / 1000.00f ];
    }else{
        totleStr = [NSString stringWithFormat:@"%.2fB",totleSize / 1.00f];
    }
    return totleStr;
}
#pragma mark - 清除path文件夹下缓存大小
+ (BOOL)clearCacheWithFilePath:(NSString *)path{
    //拿到path路径的下一级目录的子文件夹
    NSArray *subPathArr = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:path error:nil];
    NSString *filePath = nil;
    NSError *error = nil;
    for (NSString *subPath in subPathArr)
    {
        filePath = [path stringByAppendingPathComponent:subPath];
        //删除子文件夹
        [[NSFileManager defaultManager] removeItemAtPath:filePath error:&error];
        if (error) {
            return NO;
        }
    }
    return YES;
}

来自：https://blog.csdn.net/grl18840839630/article/details/79581405