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FileManager.h文件：
#import <Foundation/Foundation.h>
@interface FileManager : NSObject
+(BOOL)fileExistsAtPath:(NSString *)path;
+(NSString *)getDocumentsPath;
+(BOOL)createDirectoryWithPath:(NSString *)path;
+(BOOL)removeFileAtPath:(NSString *)filePath;
+(BOOL)renameFileName:(NSString *)oldName toNewName:(NSString *)newName;
+(NSData *)readFileContent:(NSString *)filePath;
+(BOOL)saveToDirectory:(NSString *)path data:(NSData *)data name:(NSString *)newName;
+(float)getFileSize:(NSString *)filePath;
@end
FileManager.m文件：
#import "FileManager.h"
@class NSFileManager;
#define DocumentsPath [self getDocumentsPath]
@implementation FileManager
//判断目录是否存在
+(BOOL)fileExistsAtPath:(NSString *)path
{
return [[NSFileManager defaultManager] fileExistsAtPath:path];
}
//获取Documents路径
+(NSString *)getDocumentsPath
{
NSArray * paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString * documentsDirectory = [paths objectAtIndex:0];
return documentsDirectory;
}
//在Documents目录下创建新目录或文件
+(BOOL)createDirectoryWithPath:(NSString *)path
{
BOOL result = NO;
NSFileManager * fileManager = [NSFileManager defaultManager];
NSString * myDirectory = [DocumentsPath stringByAppendingPathComponent:path];
if ([fileManager fileExistsAtPath:myDirectory] == NO) {
NSError * error = nil;
result=[fileManager createDirectoryAtPath:myDirectory withIntermediateDirectories:NO attributes:nil error:&error];
if (error) {
NSLog(@"创建目录失败：%@",[error localizedDescription]);
}
}
return result;
}
//删除目录或文件
+(BOOL)removeFileAtPath:(NSString *)filePath
{
BOOL result = NO;
NSError * error = nil;
NSString * fullPath = [DocumentsPath stringByAppendingPathComponent:filePath];
result = [[NSFileManager defaultManager] removeItemAtPath:fullPath error:&error];
if (error)
{
NSLog(@"删除失败：%@",[error localizedDescription]);
}
return result;
}
//重命名目录或文件
+(BOOL)renameFileName:(NSString *)oldName toNewName:(NSString *)newName
{
BOOL result = NO;
NSError * error = nil;
result = [[NSFileManager defaultManager] moveItemAtPath:[DocumentsPath stringByAppendingPathComponent:oldName] toPath:[DocumentsPath stringByAppendingPathComponent:newName] error:&error];
if (error) {
NSLog(@"重命名失败：%@",[error localizedDescription]);
}
return result;
}
//读取某个文件
+(NSData *)readFileContent:(NSString *)filePath
{
return [[NSFileManager defaultManager] contentsAtPath:[DocumentsPath stringByAppendingPathComponent:filePath]];
}
//保存某个文件
+(BOOL)saveToDirectory:(NSString *)path data:(NSData *)data name:(NSString *)newName
{
return [[NSFileManager defaultManager] createFileAtPath:[DocumentsPath stringByAppendingPathComponent:[path stringByAppendingPathComponent:newName]] contents:data attributes:nil];
}
//计算文件大小
+(float)getFileSize:(NSString *)filePath
{
NSError * error = nil;
NSDictionary * attributes = [NSDictionary dictionaryWithDictionary:[[NSFileManager defaultManager] attributesOfItemAtPath:[DocumentsPath stringByAppendingPathComponent:filePath] error:&error]];
if (attributes != nil)
{
return [[attributes objectForKey:NSFileSize] floatValue];
}
if (error) {
NSLog(@"计算文件大小失败：%@",[error localizedDescription]);
}
return 0;
}
@end