ios中文件夹文件的创建和删除

　//1、文件夹、文件的创建和删除

NSFileManager *fileManager=[NSFileManager defaultManager];

NSString *filePath=@"/Users/apple/Desktop/";

NSError *error;

　//判断当前文件夹是否存在

BOOL isExist=[fileManager contentsOfDirectoryAtPath:[NSString stringWithFormat:@"%@",filePath] error:&error];

//创建子文件夹

BOOL isExist1=[fileManager createDirectoryAtPath:[NSString stringWithFormat:@"%@/hello"] withIntermediateDirectories:YES attributes:nil error:&error];

//在指定路径下创建文件内容

　BOOL isExist2=[fileManager createFileAtPath:[NSString stringWithFormat:@"%@/hello/temp"] contents:[@"hello world" dataUsingEncoding:NSUTF8StringEncoding] attributes:nil];

BOOL isExist3=[fileManager removeItemAtPath:[NSString stringWithFormat:@"%@/hello"] error:&error];

//2、文件的读取和写入

NSFileHandle *handle=[NSFileHandle fileHandleForReadingAtPath:[NSString stringWithFormat:@"%@/hello",filePath]];

//读取文件的内容

NSData *fileData=[handle readDataToEndOfFile];

NSString *fileStr=[[NSString alloc]initWithData:fileData encoding:NSUTF8StringEncoding];

//文件的读取

NSFileHandle *fh=[NSFileHandle fileHandleForWritingAtPath:[NSString stringWithFormat:@"%@/hello",filePath]];

NSData *writeData=[@"hello" dataUsingEncoding:NSUTF8StringEncoding];

//定位到文件最后

[fh seekToEndOfFile];

//写入文件

[fh writeData:writeData];