ca180,有关海瑞的故事,大庆医学高等专科学校
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
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// 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 < 1024) {
return @"0K";
}else if(folderSize/1024.0 < 1024){
return [NSString stringWithFormat:@"%.2fK",folderSize/1024.0];
}else if(folderSize/1024.0/1024.0 < 1024){
return [NSString stringWithFormat:@"%.2fM",folderSize/1024.0/1024.0];
}else if(folderSize/1024.0/1024.0/1024.0 < 1024){
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 0;
NSEnumerator *childFilesEnumerator = [[manager subpathsAtPath:folderPath] objectEnumerator];
NSString* fileName;
long long folderSize = 0;
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) == 0){
return st.st_size;
}
return 0;
}
@end
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