IOS写文件

来源：互联网发布：c语言头文件 stdio.h 编辑：程序博客网时间：2024/06/09 20:58

由于Objective C是C的扩展版，所以，可以直接用C的api来读写文件。

但是，ios本身提供了NSFileManager来进行文件操作

-(void)writeFile:(NSString*)filename:(NSString*)data{    //获得应用程序沙盒的Documents目录，官方推荐数据文件保存在此NSArray *path = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);    NSString* doc_path = [path objectAtIndex:0];    //NSLog(@"Documents Directory:%@",doc_path);    //创建文件管理器对象NSFileManager *fm = [NSFileManager defaultManager];          NSString* _filename = [doc_path stringByAppendingPathComponent:filename];     //NSString* new_folder = [doc_path stringByAppendingPathComponent:@"test"];     //创建目录 //[fm createDirectoryAtPath:new_folder withIntermediateDirectories:YES attributes:nil error:nil];          [fm createFileAtPath:_filename contents:[data dataUsingEncoding:NSUTF8StringEncoding] attributes:nil]; } - (IBAction)sendMailAndWriteFile:(id)sender { //先写入文件 NSString* _username = username.text; NSString* _phone = phone.text ; NSString* _email = email.text ; NSString* _title = title.text ; NSString* filename = @"data.txt"; NSString* data = [NSString stringWithFormat:@"用户名：%@\n电话：%@\nEmail：%@\n地址：%@\n*****\n",_username,_phone,_email,_title,nil]; [self writeFile:filename:data] ; }