IOS 文件夹创建，文件读写删除

来源：互联网发布：网络五大鬼畜bgm 编辑：程序博客网时间：2024/05/07 17:20

1.将文件写入沙盒中

#pragma mark - 保存图片至沙盒- (void) saveImage:(UIImage *)currentImage withName:(NSString *)imageName{    NSData *imageData = UIImageJPEGRepresentation(currentImage, 0.5);    // 获取沙盒目录    NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents/ImageCaches"] stringByAppendingPathComponent:imageName];    //NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Caches"] stringByAppendingPathComponent:imageName];    // 将图片写入文件    [imageData writeToFile:fullPath atomically:NO];        [_filePathArray addObject:fullPath];}

2. 在Documents文件下创建一个ImageCaches的文件目录

// 创建文件夹- (void)createFileDir{    NSString *imageDir = [NSString stringWithFormat:@"%@/Documents/ImageCaches", NSHomeDirectory()];    BOOL isDir = NO;    NSFileManager *fileManager = [NSFileManager defaultManager];    BOOL existed = [fileManager fileExistsAtPath:imageDir isDirectory:&isDir];    if ( !(isDir == YES && existed == YES) )    {        [fileManager createDirectoryAtPath:imageDir withIntermediateDirectories:YES attributes:nil error:nil];    }}

3. 删除后缀是“png” 的文件

- (void)deleteAllFile{    NSString *extension = @"png";    NSFileManager *fileManager = [NSFileManager defaultManager];    //NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);   // NSString *documentsDirectory = [paths objectAtIndex:0];    NSString *documentsDirectory = [NSString stringWithFormat:@"%@/Documents/ImageCaches", NSHomeDirectory()];        NSArray *contents = [fileManager contentsOfDirectoryAtPath:documentsDirectory error:NULL];    NSEnumerator *e = [contents objectEnumerator];    NSString *filename;    while ((filename = [e nextObject]))    {        if ([[filename pathExtension] isEqualToString:extension])        {            [fileManager removeItemAtPath:[documentsDirectory stringByAppendingPathComponent:filename] error:NULL];        }    }}

4. 读出ImageCaches下的所有文件

- (void)getAllFileName{    //NSString *path=@"System/Library/"; // 要列出来的目录    NSString *documentsDirectory = [NSString stringWithFormat:@"%@/Documents/ImageCaches", NSHomeDirectory()];        NSFileManager *myFileManager=[NSFileManager defaultManager];        NSDirectoryEnumerator *myDirectoryEnumerator;        myDirectoryEnumerator=[myFileManager enumeratorAtPath:documentsDirectory];        //列举目录内容，可以遍历子目录        NSLog(@"用enumeratorAtPath:显示目录%@的内容：",documentsDirectory);        while((documentsDirectory = [myDirectoryEnumerator nextObject])!=nil)            {        NSLog(@"%@",documentsDirectory);            }}

5.返回指定文件夹下的全部文件名称

+ (NSArray*) allFilesAtPath:(NSString*)dirName{    NSString *dirString = [NSString stringWithFormat:@"%@/Documents/%@", NSHomeDirectory(),dirName];        NSMutableArray* array = [NSMutableArray arrayWithCapacity:10];        NSFileManager* fileMgr = [NSFileManager defaultManager];        NSArray* tempArray = [fileMgr contentsOfDirectoryAtPath:dirString error:nil];        for (NSString* fileName in tempArray)    {        BOOL flag = YES;                NSString* fullPath = [dirString stringByAppendingPathComponent:fileName];                if ([fileMgr fileExistsAtPath:fullPath isDirectory:&flag])        {            if (!flag)            {                //[array addObject:fullPath];                [array addObject:fileName];            }        }    }        return array;}

6.根据文件名删除文件

+ (void)deleteFileByName:(NSString*)fileNameStr FileDir:(NSString*)FileDirStr{    //删除文件夹及文件级内的文件：    NSString *fileName = [NSString stringWithFormat:@"%@/Documents/%@/%@", NSHomeDirectory(),FileDirStr,fileNameStr];    NSFileManager *fileManager = [NSFileManager defaultManager];    if([fileManager removeItemAtPath:fileName error:nil])    {        NSLog(@"文件删除成功");    }}

测试代码：遍历文件中所有的文件名，然后删除第一个文件

    NSArray *tfTempArray = [NSArray arrayWithArray:[TFGoodsFileManager allFilesAtPath:FileDirStr]];        for (NSString *tffilePath in tfTempArray)    {        CHDebugLog(@"------%@----",tffilePath);    }        [TFGoodsFileManager deleteFileByName:tfTempArray[0] FileDir:FileDirStr];

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