FileManager 删除文件 移动并重命名文件 获取文件大小
/*删除文件 指向目录为（NSCachesDirectory）临时文件夹*/
- (void)deleteFileAtPath:(NSString *)filename {
NSFileManager *fileManager = [NSFileManager defaultManager];
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask, YES) objectAtIndex:0];
NSString *delelteFilePath = [documentsDirectory stringByAppendingPathComponent:filename];
NSError *error;
if ([fileManager removeItemAtPath:delelteFilePath error:&error] != YES)
NSLog(@"Unable to delete file: %@", [error localizedDescription]);
}
/* 移动文件，从NSCachesDirectory 移动到 NSCachesDirectory//tempFolder目录 */
- (void)moveFileAtPath:(NSString *)desFileName SrcFileName:(NSString *)srcFileName {
NSFileManager *fileManager = [NSFileManager defaultManager];
//目标目录
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask, YES) objectAtIndex:0];
NSString *tempFolderDirDirectory = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@",@"tempFolder"]];
NSString *desFileNamePath = [tempFolderDirDirectory stringByAppendingPathComponent:desFileName];
BOOL isDir = NO;
NSError *error;
[fileManager fileExistsAtPath:desFileNamePath isDirectory:(&isDir)];
if (!isDir) { //不存在就要创建目标目录
if ([fileManager createDirectoryAtPath:tempFolderDirDirectory withIntermediateDirectories:YES attributes:nil error:&error] != YES) {
NSLog(@"Unable to create file directory: %@", [error localizedDescription]);
};
}
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask, YES) objectAtIndex:0];
NSString *srcFileNamePath = [documentsDirectory stringByAppendingPathComponent:srcFileName];
//判断是否移动
if ([fileManager moveItemAtPath:srcFileNamePath toPath:desFileNamePath error:&error] != YES)
NSLog(@"Unable to move file: %@", [error localizedDescription]);
}
/* 遍历文件夹的所有文件（非隐藏文件）并移动到指定目录*/
- (void)removeAllFile {
NSFileManager *fileManager = [NSFileManager defaultManager];
//在这里获取应用程序Documents文件夹里的文件及文件夹列表
NSError *error = nil;
NSArray *fileList = [[NSArray alloc] init];
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask, YES) objectAtIndex:0];
NSString *tempFolderDirDirectory = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@",@"tempFolder"]];
//fileList便是包含有该文件夹下所有文件的文件名及文件夹名的数组
fileList = [fileManager contentsOfDirectoryAtPath:tempFolderDirDirectory error:&error];
BOOL isDir = NO;
for (NSString *fileName in fileList) {
NSString *filePathName = [tempFolderDirDirectory stringByAppendingPathComponent:fileName];
//注意过滤隐藏文件（如D.store）
[fileManager fileExistsAtPath:filePathName isDirectory:(&isDir)];
if (!isDir) {
[self moveFileAtPath:fileName SrcFileName:fileName];
}
}
[fileList release];
}
/*接口函数 指向目录为（NSCachesDirectory）临时文件夹*/
-(NSString *)myFileFolderFileSize {
return [NSString stringWithFormat:@"%.2f M",[self folderSizeAtPath:[NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask, YES) objectAtIndex:0]]];
}
/*单个文件的文件大小*/
- (long long) fileSizeAtPath:(NSString*) filePath{
NSFileManager* manager = [NSFileManager defaultManager];
if ([manager fileExistsAtPath:filePath]){
return [[manager attributesOfItemAtPath:filePath error:nil] fileSize];
}
return 0;
}
/*整个目录的文件大小*/
- (float ) 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 folderSize/(1024.0*1024.0);
}