LSCacheFile.h
//
// LSCacheFile.h
// iPhone
//
// Created by xujinzhong on 14-6-5.
// Copyright (c) 2014年 xujinzhong. All rights reserved.
// #import <Foundation/Foundation.h>
#import "LSCommonMacro.h"
@interface LSCacheFile : NSObject //写入文件
+ (BOOL)writeFileName:(NSString *)fileName data:(id)result;
//读出文件
+ (id)readFileName:(NSString *)fileName;
//计算文件大小
+ (NSString *)folderSizeStringAtPath:(NSString *)folderPath;
//格式化size为M，K模式
+(NSString*)sizeStringFromSizeLong:(long long) folderSize;
//以B方式获取目录下的文件大小
+ (long long)folderSizeAtPath:(NSString*)folderPath;
//判断文件是否存在
+ (BOOL)isExistsFile:(NSString *)filepath;
//删除缓存文件
+ (void)deleteCacheFile:(NSString *)filepath; @end
LSCacheFile.m
//
// LSCacheFile.m
// iPhone
//
// Created by xujinzhong on 14-6-5.
// Copyright (c) 2014年 xujinzhong. All rights reserved.
// #import "LSCacheFile.h"
#include "sys/stat.h" #define PATH_AT_LIBDIR(name) [[NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:name] @implementation LSCacheFile + (NSString *)filePath:(NSString *)fileName{
NSString *floderPath = PATH_AT_LIBDIR(@"Caches/LSCacheFinder");
if(![[NSFileManager defaultManager] fileExistsAtPath:floderPath isDirectory:nil]){
[[NSFileManager defaultManager] createDirectoryAtPath:floderPath withIntermediateDirectories:NO attributes:nil error:nil];
}
return [floderPath stringByAppendingPathComponent:fileName];
} + (BOOL)writeFile:(NSString *)fileName object:(id)object{
if(fileName == nil){ return NO;
}
if(![NSKeyedArchiver archiveRootObject:object toFile:fileName]){ return NO;
}
return YES;
} + (id)readFile:(NSString *)fileName{
if(fileName == nil){
return nil;
}
return [NSKeyedUnarchiver unarchiveObjectWithFile:fileName];
} + (BOOL)writeFileName:(NSString *)fileName data:(id)result{
NSString *pathName = [LSCacheFile filePath:fileName];
if ([LSCacheFile isExistsFile:pathName]) {
[[NSFileManager defaultManager] removeItemAtPath:pathName error:nil];
}
return [LSCacheFile writeFile:pathName object:result];
} + (id)readFileName:(NSString *)fileName{
if (!fileName) {
return nil;
}
if(![LSCacheFile isExistsFile:fileName]){
return nil;
} id object = [LSCacheFile readFile:[LSCacheFile filePath:fileName]];
if (!object) {
return nil;
}
return object;
} + (BOOL)isExistsFile:(NSString *)filepath{
NSFileManager *filemanage = [NSFileManager defaultManager];
return [filemanage fileExistsAtPath:[LSCacheFile filePath:filepath]];
} +(void)deleteCacheFile:(NSString *)filepath
{
BOOL flag = NO;
if([[NSFileManager defaultManager] fileExistsAtPath:filepath isDirectory:&flag])
{
[[NSFileManager defaultManager] removeItemAtPath:filepath error:nil];
}
} //计算文件夹下文件的总大小
+ (NSString *)folderSizeStringAtPath:(NSString *)folderPath
{
long long folderSize = [LSCacheFile folderSizeAtPath:folderPath];
return [self sizeStringFromSizeLong:folderSize];
} +(NSString*)sizeStringFromSizeLong:(long long) folderSize
{
if (folderSize < ) {
return @"0K";
}else if(folderSize/1024.0 < ){
return [NSString stringWithFormat:@"%.2fK",folderSize/1024.0];
}else if(folderSize/1024.0/1024.0 < ){
return [NSString stringWithFormat:@"%.2fM",folderSize/1024.0/1024.0];
}else if(folderSize/1024.0/1024.0/1024.0 < ){
return [NSString stringWithFormat:@"%.2fG",folderSize/1024.0/1024.0/1024.0];
}
return @"";
} + (long long)folderSizeAtPath:(NSString*)folderPath{
NSFileManager* manager = [NSFileManager defaultManager];
if (![manager fileExistsAtPath:folderPath]) return ;
NSEnumerator *childFilesEnumerator = [[manager subpathsAtPath:folderPath] objectEnumerator];
NSString* fileName;
long long folderSize = ;
while ((fileName = [childFilesEnumerator nextObject]) != nil){
NSString* fileAbsolutePath = [folderPath stringByAppendingPathComponent:fileName];
folderSize += [LSCacheFile fileSizeAtPath:fileAbsolutePath];
}
return folderSize;
} + (long long)fileSizeAtPath:(NSString*)filePath{
struct stat st;
if(lstat([filePath cStringUsingEncoding:NSUTF8StringEncoding], &st) == ){
return st.st_size;
}
return ;
} @end