标签：style blog http color io os ar strong for
IOS访问沙盒目录API
获取程序目录
NSString *homePath = NSHomeDirectory();
~/Library/Application Support/iPhone Simulator/7.1/Applications/66095245-FD69-40D5-B3F5-9594A6DC6862
获取Documents Library tmp Library/Cache目录
NSArray *array = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentPath = [array firstObject];
NSLog(@"%@",documentPath);
//Cache目录
array = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *cachesPath = [array firstObject];
NSLog(@"%@",cachesPath);
//Library
array = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory,NSUserDomainMask,YES);
NSString *libraryPath = [array firstObject];
NSLog(@"%@",libraryPath);
//tmp
NSString *tmpPath = NSTemporaryDirectory();
NSLog(@"%@",tmpPath);
数组在文件中的读写
//写入数组至文件
NSArray *writeArray = @[@"张三",@"李四",@"王五"];
[writeArray writeToFile:[documentPath stringByAppendingPathComponent:@"test.txt"] atomically:YES];
//读取文件到数组
NSArray *readArray = [NSArray arrayWithContentsOfFile:[documentPath stringByAppendingPathComponent:@"test.txt"]];
atomically:如果为YES保证文件的写入原子性,会先创建一个临时文件,直到文件内容写入成功再导入到目标文件里.
如果为NO,则直接写入目标文件里.
通过NSFileManager进行文件操作
通过NSFileManager进行文件的创建
//在Document下创建文件夹和文件 NSString *testDirectory = [documentPath stringByAppendingPathComponent:@"test"]; NSString *test1 = [testDirectory stringByAppendingPathComponent:@"test1.txt"]; NSString *test2 = [testDirectory stringByAppendingPathComponent:@"test2.txt"]; NSString *test3 = [testDirectory stringByAppendingPathComponent:@"test3.txt"]; NSFileManager *manager = [NSFileManager defaultManager]; [manager createDirectoryAtPath:testDirectory withIntermediateDirectories:YES attributes:nil error:nil]; NSString *text = @"你好,IOS"; [manager createFileAtPath:test1 contents:[text dataUsingEncoding:NSUTF8StringEncoding] attributes:nil]; [manager createFileAtPath:test2 contents:[text dataUsingEncoding:NSUTF8StringEncoding] attributes:nil]; [manager createFileAtPath:test3 contents:[text dataUsingEncoding:NSUTF8StringEncoding] attributes:nil];
通过NSFileManager进行文件的遍历
//读取所有的文件名，两种方法效果一样 NSArray *files1 = [manager subpathsAtPath:testDirectory]; NSArray *files2 = [manager subpathsOfDirectoryAtPath:testDirectory error:nil];
通过NSFileManager操作当前目录
[manager changeCurrentDirectoryPath:documentPath]; NSArray *fileArray = [[NSArray alloc] initWithObjects:@"hello world",@"hello world1", @"hello world2",nil]; [manager createFileAtPath:@"testFileNSFileManager.txt" contents:fileArray attributes:nil]; [manager createFileAtPath:@"testFileNSFileManager1.txt" contents:fileArray attributes:nil];
通过NSFileManager删除文件
[manager removeItemAtPath:@"testFileNSFileManager1.txt" error:nil];
通过NSFileHandle进行文件IO操作
NSFileHandle不能进行文件的创建，所以文件创建还得通过NSFileManager，NSFileHandle打开的文件如果不存在将返回nil
//在Document下创建三个文件，将文件1全部内容和文件2部分内容复制到文件3，然后删除文件1; NSArray *array = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentPath = [array firstObject]; NSFileManager *manager = [NSFileManager defaultManager]; NSString *path1 = [documentPath stringByAppendingPathComponent:@"text1.txt"]; NSString *path2 = [documentPath stringByAppendingPathComponent:@"text2.txt"]; NSString *path3 = [documentPath stringByAppendingPathComponent:@"text3.txt"]; //创建3个文件 [manager createFileAtPath:path1 contents:[@"hello from text1" dataUsingEncoding:NSUTF8StringEncoding] attributes:nil]; [manager createFileAtPath:path2 contents:[@"hello from text2" dataUsingEncoding:NSUTF8StringEncoding] attributes:nil]; [manager createFileAtPath:path3 contents:[@"hello from text3" dataUsingEncoding:NSUTF8StringEncoding] attributes:nil]; //获取NSFileHandle对象 NSFileHandle *path1Handle = [NSFileHandle fileHandleForReadingAtPath:path1]; NSFileHandle *path2Handle = [NSFileHandle fileHandleForReadingAtPath:path2]; NSFileHandle *path3Handle = [NSFileHandle fileHandleForWritingAtPath:path3]; //IO读写 NSData *text1Data = [path1Handle readDataToEndOfFile]; NSData *text2Data = [path2Handle readDataOfLength:5]; //将text3文件的文件指针移动到最后 [path3Handle seekToEndOfFile]; NSMutableData *data = [NSMutableData dataWithData:text1Data]; [data appendData:text2Data]; [path3Handle writeData:data]; //关闭NSFileHandle对象 [path1Handle closeFile]; [path2Handle closeFile]; [path3Handle closeFile]; //删除text1 [manager removeItemAtPath:path1 error:nil];
NSBundle处理项目相关资源
http://blog.csdn.net/iphoneing/article/details/5872610
标签：style blog http color io os ar strong for
原文地址：http://www.cnblogs.com/zanglitao/p/3998295.html
