#import <Foundation/Foundation.h>#include <sys/param.h>
#include <sys/mount.h>@interface DiskSpaceTool : NSObject/**手机剩余空间*/
+ (NSString *)freeDiskSpaceInBytes;/**手机总空间*/
+ (NSString *)totalDiskSpaceInBytes;/**某个文件夹占用空间的大小*/
+ (NSString *)folderSizeAtPath:(NSString*) folderPath;@end

#import "DiskSpaceTool.h"@implementation DiskSpaceTool+ (NSString *)freeDiskSpaceInBytes;
{struct statfs buf;long long freespace = -1;if(statfs("/var", &buf) >= 0){freespace = (long long)(buf.f_bsize * buf.f_bfree);}return [self humanReadableStringFromBytes:freespace];
}+ (NSString *)totalDiskSpaceInBytes;
{struct statfs buf;long long freespace = 0;if (statfs("/", &buf) >= 0) {freespace = (long long)buf.f_bsize * buf.f_blocks;}if (statfs("/private/var", &buf) >= 0) {freespace += (long long)buf.f_bsize * buf.f_blocks;}return [self humanReadableStringFromBytes:freespace];
}// 遍历文件夹获得文件夹大小
+ (NSString *) folderSizeAtPath:(NSString*) folderPath
{NSFileManager* manager = [NSFileManager defaultManager];if (![manager fileExistsAtPath:folderPath]) return 0;NSEnumerator *childFilesEnumerator = [[manager subpathsAtPath:folderPath] objectEnumerator];NSString* fileName;long long folderSize = 0;while ((fileName = [childFilesEnumerator nextObject]) != nil){NSString* fileAbsolutePath = [folderPath stringByAppendingPathComponent:fileName];folderSize += [self fileSizeAtPath:fileAbsolutePath];}return [self humanReadableStringFromBytes:folderSize];
}// 单个文件的大小
+ (long long) fileSizeAtPath:(NSString*) filePath
{NSFileManager* manager = [NSFileManager defaultManager];if ([manager fileExistsAtPath:filePath]){return [[manager attributesOfItemAtPath:filePath error:nil] fileSize];}return 0;
}// 计算文件大小
+ (NSString *)humanReadableStringFromBytes:(unsigned long long)byteCount
{float numberOfBytes = byteCount;int multiplyFactor = 0;NSArray *tokens = [NSArray arrayWithObjects:@"bytes",@"KB",@"MB",@"GB",@"TB",@"PB",@"EB",@"ZB",@"YB",nil];while (numberOfBytes > 1024) {numberOfBytes /= 1024;multiplyFactor++;}return [NSString stringWithFormat:@"%4.2f %@",numberOfBytes, [tokens objectAtIndex:multiplyFactor]];
}@end