ios 擷取檔案大小

檔案夾：

首先匯入標頭檔：

#include <sys/stat.h>#include <dirent.h>#define Localizable_LF_Size_Bytes                                   @"%lld Bytes"#define Localizable_LF_Size_K                                       @"%lld K"#define Localizable_LF_Size_M                                       @"%lld.%lld M"#define Localizable_LF_Size_G                                       @"%lld.%d G"#define Localizable_LF_All_Size_M                                   @"%lld.%lld M"#define Localizable_LF_All_Size_G                                   @"%lld.%lld G"

-(long long) folderSizeAtPath:(NSString*) folderPath{    return [self _folderSizeAtPath:[folderPath cStringUsingEncoding:NSUTF8StringEncoding]];}-(long long) _folderSizeAtPath: (const char*)folderPath{    long long folderSize = 0;    DIR* dir = opendir(folderPath);    if (dir == NULL) return 0;    struct dirent* child;    while ((child = readdir(dir))!=NULL) {        if (child->d_type == DT_DIR && (                                        (child->d_name[0] == '.' && child->d_name[1] == 0) || // 忽略目錄 .                                        (child->d_name[0] == '.' && child->d_name[1] == '.' && child->d_name[2] == 0) // 忽略目錄 ..                                        )) continue;                int folderPathLength = strlen(folderPath);        char childPath[1024]; // 子檔案的路徑地址        stpcpy(childPath, folderPath);        if (folderPath[folderPathLength-1] != '/'){            childPath[folderPathLength] = '/';            folderPathLength++;        }        stpcpy(childPath+folderPathLength, child->d_name);        childPath[folderPathLength + child->d_namlen] = 0;        if (child->d_type == DT_DIR){ // directory            folderSize += [self _folderSizeAtPath:childPath]; // 遞迴調用子目錄            // 把目錄本身所佔的空間也加上            struct stat st;            if(lstat(childPath, &st) == 0) folderSize += st.st_size;        }else if (child->d_type == DT_REG || child->d_type == DT_LNK){ // file or link            struct stat st;            if(lstat(childPath, &st) == 0) folderSize += st.st_size;        }    }    return folderSize;}/****************************************************************************** 函數名稱 : + (NSString *)stringForAllFileSize:(UInt64)fileSize 函數描述 : 格式話返迴文件大小 輸入參數 : (UInt64)fileSize 輸出參數 : N/A 返回參數 : (NSString *) 備忘資訊 : ******************************************************************************/-(NSString *)stringForAllFileSize:(UInt64)fileSize{    if (fileSize<1024) {//Bytes/Byte        if (fileSize>1) {            return [NSString stringWithFormat:Localizable_LF_Size_Bytes,                    fileSize];        }else {//==1 Byte            return [NSString stringWithFormat:Localizable_LF_Size_Bytes,                    fileSize];        }    }    if ((1024*1024)>(fileSize)&&(fileSize)>1024) {//K        return [NSString stringWithFormat:Localizable_LF_Size_K,                fileSize/1024];    }        if ((1024*1024*1024)>fileSize&&fileSize>(1024*1024)) {//M        return [NSString stringWithFormat:Localizable_LF_All_Size_M,                fileSize/(1024*1024),                fileSize%(1024*1024)/(1024*102)];    }    if (fileSize>(1024*1024*1024)) {//G        return [NSString stringWithFormat:Localizable_LF_All_Size_G,                fileSize/(1024*1024*1024),                fileSize%(1024*1024*1024)/(1024*1024*102)];    }    return nil;}

檔案的大小：

            long sizelong = [[[manager attributesOfFileSystemForPath:cacheDocPath error:nil] objectForKey:NSFileSize] longLongValue];

參考：http://www.easymorse.com/index.php/archives/638