#import "TestViewController.h"@implementation TestViewController- (void)viewDidLoad { [super viewDidLoad]; //创建与删除： //创建文件管理器 NSFileManager *fileManager = [NSFileManager defaultManager]; //获取路径 //参数NSDocumentDirectory要获取哪种路径 —— 获取 /Documents路径 NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0];//去处需要的路径 NSLog(@"%@",documentsDirectory); //更改到待操作的目录下 [fileManager changeCurrentDirectoryPath:[documentsDirectory stringByExpandingTildeInPath]]; //创建文件fileName文件名称，contents文件的内容，如果开始没有内容可以设置为nil，attributes文件的属性，初始为nil [fileManager createFileAtPath:@"fileName" contents:nil attributes:nil]; //删除待删除的文件 [fileManager removeItemAtPath:@"createdNewFile" error:nil]; //写入数据： //获取文件路径 NSString *path = [documentsDirectory stringByAppendingPathComponent:@"fileName"]; //待写入的数据 NSString *temp = @"Hello friend"; int data0 = 100000; float data1 = 23.45f; //创建数据缓冲 NSMutableData *writer = [[NSMutableData alloc] init]; //将字符串添加到缓冲中 [writer appendData:[temp dataUsingEncoding:NSUTF8StringEncoding]]; //将其他数据添加到缓冲中 [writer appendBytes:&data0 length:sizeof(data0)]; [writer appendBytes:&data1 length:sizeof(data1)]; //将缓冲的数据写入到文件中 [writer writeToFile:path atomically:YES]; [writer release]; //读取数据： int gData0; float gData1; NSString *gData2; NSData *reader = [NSData dataWithContentsOfFile:path]; gData2 = [[NSString alloc] initWithData:[reader subdataWithRange:NSMakeRange(0, [temp length])] encoding:NSUTF8StringEncoding]; [reader getBytes:&gData0 range:NSMakeRange([temp length], sizeof(gData0))]; [reader getBytes:&gData1 range:NSMakeRange([temp length] + sizeof(gData0), sizeof(gData1))]; NSLog(@"gData0:%i gData1:%0.2f gData2:%@", gData0, gData1, gData2); /* //读取工程中的文件： //读取数据时，要看待读取的文件原有的文件格式，是字节码还是文本，我经常需要重文件中读取字节码，所以我写的是读取字节文件的方式。 //用于存放数据的变量，因为是字节，所以是ＵInt8 UInt8 b = 0; //获取文件路径 NSString *path8 = [[NSBundle mainBundle] pathForResource:@"fileName" ofType:@""]; //获取数据 NSData *reader8 = [NSData dataWithContentsOfFile:path8]; //获取字节的个数 int length = [reader8 length]; NSLog(@"------->bytesLength:%d", length); for(int i = 0; i < length; i++) { //读取数据 [reader8 getBytes:&b range:NSMakeRange(i, sizeof(b))]; NSLog(@"-------->data%d:%d", i, b); } */ /* //创建一个NSFileManager，创建自定义文件夹myTest NSFileManager *fileManger = [NSFileManager defaultManager]; NSString *myDirectory = [documentsDirectory stringByAppendingPathComponent:@"myTest"]; BOOL ok = [fileManger createDirectoryAtPath:myDirectory attributes:nil]; //取得一个目录下得所有文件名：（如上面的myDirectory)可用 NSArray *file = [fileManger subpathsOfDirectoryAtPath: myDirectory error:nil]; //或 //NSArray *files = [fileManager subpathsAtPath: myDirectory ]; //读取某个文件: NSData *data = [fileManger contentsAtPath:myFilePath];//myFilePath是包含完整路径的文件名 //或直接用NSData 的类方法： //NSData *data = [NSData dataWithContentOfPath:myFilePath]; //保存某个文件: //可以用 NSFileManager的 - (BOOL)createFileAtPath:(NSString *)path contents:(NSData *)data attributes:(NSDictionary *)attr; //或 NSData 的 - (BOOL)writeToFile:(NSString *)path atomically:(BOOL)useAuxiliaryFile; - (BOOL)writeToFile:(NSString *)path options:(NSUInteger)writeOptionsMask error:(NSError **)errorPtr;*/ // NSString *filePath = [[NSBundle mainBundle] bundlePath];//获得app的路径//2011-08-24 09:52:30.168 Test[619:207] /Users/ibokanwisdom06/Library/Application Support/iPhone Simulator/4.2/Applications/E91BDD30-2DB9-4982-BBCA-EE51A65091BA/Test.app// NSString *filePath = [[NSBundle mainBundle] executablePath];//获得test的路径//2011-08-24 09:52:54.882 Test[649:207] /Users/ibokanwisdom06/Library/Application Support/iPhone Simulator/4.2/Applications/E91BDD30-2DB9-4982-BBCA-EE51A65091BA/Test.app/Test// NSString *filePath = [[NSBundle mainBundle] privateFrameworksPath];//获得Frameworks的路径// NSLog(@"%@",filePath); }- (void)dealloc { [super dealloc];}@end