NSFileManager类主要方法
+(NSFileManager *)defaultManager;获得文件管理器对象 -(BOOL)createFileAtPath:(NSString *)path contents:(NSData *)data attributes:(NSDictionary *)attr;创建文件 -(BOOL)createDirectoryAtPath:(NSString *)path withIntermediateDirectories:(BOOL)createIntermediates attributes:(NSDictionary *)attributes error:(NSError **)error;创建目录-(BOOL)fileExistsAtPath:(NSString *)path;判断一个文件或目录是否存在
-(BOOL)fileExistsAtPath:(NSString *)path isDirectory:(BOOL *)isDirectory;判断文件是否存在且判断path是文件还是目录
-(BOOL)copyItemAtPath:(NSString *)srcPath toPath:(NSString *)dstPath error:(NSError **)error;文件或目录复制
-(BOOL)moveItemAtPath:(NSString *)srcPath toPath:(NSString *)dstPath error:(NSError **)error;文件或目录移动
-(BOOL)removeItemAtPath:(NSString *)path error:(NSError **)error;文件或目录删除 创建文件代码
//创建文件
NSFileManager *fm = [NSFileManager defaultManager]; //创建文件管理器
NSString *path = @"/Users/ni/Desktop/input.txt";
NSString *str = @"Hello World!";
NSData *data = [str dataUsingEncoding:NSUTF8StringEncoding]; //将str转化为NSData类型
BOOL flag = [fm createFileAtPath:path contents:data attributes:nil];
if(flag) {
NSLog(@"create success!");
} else {
NSLog(@"create fail!");
}
读取文件代码
//读取文件 NSString *fileContent = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil]; NSLog(@"%@",fileContent);
NSData:用来设置缓冲区，将文件内容读入缓冲区，或将缓冲区的内容写到一个文件
目录(文件夹)操作:遍历方法
-(NSDirectoryEnumerator *)enumeratorAtPath:(NSString *)path;深度遍历(遍历所有子文件夹)，返回目录枚举器(NSDirectoryEnumerator)
-(NSArray *)contentsOfDirectoryAtPath:(NSString *)path error:(NSError **)error;浅度遍历，返回目录中的所有文件&文件夹的名字
NSString *dirPath = @"/Users/ni/Desktop/workspace";
NSFileManager *fm = [NSFileManager defaultManager];
//深度遍历
NSDirectoryEnumerator *dirs = [fm enumeratorAtPath:dirPath];
NSString *path = [dirs nextObject];
while (path != nil) {
NSLog(@"%@",path);
path = [dirs nextObject];
}
//浅度遍历
NSArray *arr = [fm contentsOfDirectoryAtPath:dirPath error:nil];
NSLog(@"%@", arr);
NSDirectoryEnumerator类有两个方法
-(id)nextObject;
-(NSArray *)allObjects;
时间： 2024-11-09 06:22:17