【代码笔记】iOS-NSFileManager

一，代码。

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    //获取应用沙盒根路径

    [self dirHome];

    //获取Documents目录

    [self dirDoc];

    //获取Library目录

    [self dirLib];

    //获取Cache目录

    [self dirCache];

    //创建文件夹

     [self createDir];

    //创建文件

    [self createFile];

    //写数据到文件

    [self writeFile];

    //读文件

    [self readFile];

    //文件属性

    [self fileAttriutes];

    //删除文件

    [self deleteFile];

}

#pragma -mark -funcitons

//获取应用沙盒根路径

-(void)dirHome{

    NSString *dirHome=NSHomeDirectory();

    NSLog(@"应用沙盒根路径: %@",dirHome);

}

//获取Documents目录

-(NSString *)dirDoc{

    //[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

    NSString *documentsDirectory = [paths objectAtIndex:0];

    NSLog(@"Documents目录: %@",documentsDirectory);

    return documentsDirectory;

}

//获取Library目录

-(void)dirLib{

    //[NSHomeDirectory() stringByAppendingPathComponent:@"Library"];

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);

    NSString *libraryDirectory = [paths objectAtIndex:0];

    NSLog(@"Library目录: %@",libraryDirectory);

}

//获取Cache目录

-(void)dirCache{

    NSArray *cacPath = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);

    NSString *cachePath = [cacPath objectAtIndex:0];

    NSLog(@"Cache目录: %@",cachePath);

}

//获取Tmp目录

-(void)dirTmp{

    //[NSHomeDirectory() stringByAppendingPathComponent:@"tmp"];

    NSString *tmpDirectory = NSTemporaryDirectory();

    NSLog(@"Tmp目录: %@",tmpDirectory);

}

//创建文件夹

-(void)createDir{

    NSString *documentsPath =[self dirDoc];

    NSFileManager *fileManager = [NSFileManager defaultManager];

    NSString *testDirectory = [documentsPath stringByAppendingPathComponent:@"test"];

    // 创建目录

    BOOL res=[fileManager createDirectoryAtPath:testDirectory withIntermediateDirectories:YES attributes:nil error:nil];

    if (res) {

        NSLog(@"文件夹创建成功");

    }else{

        NSLog(@"文件夹创建失败");

    }

}

//创建文件

-(void)createFile{

    NSString *documentsPath =[self dirDoc];

    NSString *testDirectory = [documentsPath stringByAppendingPathComponent:@"test"];

    NSFileManager *fileManager = [NSFileManager defaultManager];

    NSString *testPath = [testDirectory stringByAppendingPathComponent:@"test.txt"];

    BOOL res=[fileManager createFileAtPath:testPath contents:nil attributes:nil];

    if (res) {

        NSLog(@"文件创建成功: %@" ,testPath);

    }else

        NSLog(@"文件创建失败");

}

//写数据到文件

-(void)writeFile{

    NSString *documentsPath =[self dirDoc];

    NSString *testDirectory = [documentsPath stringByAppendingPathComponent:@"test"];

    NSString *testPath = [testDirectory stringByAppendingPathComponent:@"test.txt"];

    NSString *content=@"测试写入内容！";

    BOOL res=[content writeToFile:testPath atomically:YES encoding:NSUTF8StringEncoding error:nil];

    if (res) {

        NSLog(@"文件写入成功");

    }else

        NSLog(@"文件写入失败");

}

//读文件

-(void)readFile{

    NSString *documentsPath =[self dirDoc];

    NSString *testDirectory = [documentsPath stringByAppendingPathComponent:@"test"];

    NSString *testPath = [testDirectory stringByAppendingPathComponent:@"test.txt"];

    //    NSData *data = [NSData dataWithContentsOfFile:testPath];

    //    NSLog(@"文件读取成功: %@",[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);

    NSString *content=[NSString stringWithContentsOfFile:testPath encoding:NSUTF8StringEncoding error:nil];

    NSLog(@"文件读取成功: %@",content);

}

//文件属性

-(void)fileAttriutes{

    NSString *documentsPath =[self dirDoc];

    NSString *testDirectory = [documentsPath stringByAppendingPathComponent:@"test"];

    NSFileManager *fileManager = [NSFileManager defaultManager];

    NSString *testPath = [testDirectory stringByAppendingPathComponent:@"test.txt"];

    NSDictionary *fileAttributes = [fileManager attributesOfItemAtPath:testPath error:nil];

    NSArray *keys;

    id key, value;

    keys = [fileAttributes allKeys];

    int count = [keys count];

    for (int i = 0; i < count; i++)

    {

        key = [keys objectAtIndex: i];

        value = [fileAttributes objectForKey: key];

        NSLog (@"Key: %@ for value: %@", key, value);

    }

}

//删除文件

-(void)deleteFile{

    NSString *documentsPath =[self dirDoc];

    NSString *testDirectory = [documentsPath stringByAppendingPathComponent:@"test"];

    NSFileManager *fileManager = [NSFileManager defaultManager];

    NSString *testPath = [testDirectory stringByAppendingPathComponent:@"test.txt"];

    BOOL res=[fileManager removeItemAtPath:testPath error:nil];

    if (res) {

        NSLog(@"文件删除成功");

    }else

        NSLog(@"文件删除失败");

    NSLog(@"文件是否存在: %@",[fileManager isExecutableFileAtPath:testPath]?@"YES":@"NO");

}

@end

二，输出。

2015-10-23 11:17:54.335 NSFileManager[5578:133206] 应用沙盒根路径: /Users/chenlihua/Library/Developer/CoreSimulator/Devices/78D1FCBF-9990-471F-9075-168F2CE949FE/data/Containers/Data/Application/19A5C4E6-8CDD-428A-B08C-FC68363F3980

2015-10-23 11:17:54.336 NSFileManager[5578:133206] Documents目录: /Users/chenlihua/Library/Developer/CoreSimulator/Devices/78D1FCBF-9990-471F-9075-168F2CE949FE/data/Containers/Data/Application/19A5C4E6-8CDD-428A-B08C-FC68363F3980/Documents

2015-10-23 11:17:54.336 NSFileManager[5578:133206] Library目录: /Users/chenlihua/Library/Developer/CoreSimulator/Devices/78D1FCBF-9990-471F-9075-168F2CE949FE/data/Containers/Data/Application/19A5C4E6-8CDD-428A-B08C-FC68363F3980/Library

2015-10-23 11:17:54.337 NSFileManager[5578:133206] Cache目录: /Users/chenlihua/Library/Developer/CoreSimulator/Devices/78D1FCBF-9990-471F-9075-168F2CE949FE/data/Containers/Data/Application/19A5C4E6-8CDD-428A-B08C-FC68363F3980/Library/Caches

2015-10-23 11:17:54.337 NSFileManager[5578:133206] Documents目录: /Users/chenlihua/Library/Developer/CoreSimulator/Devices/78D1FCBF-9990-471F-9075-168F2CE949FE/data/Containers/Data/Application/19A5C4E6-8CDD-428A-B08C-FC68363F3980/Documents

2015-10-23 11:17:54.337 NSFileManager[5578:133206] 文件夹创建成功

2015-10-23 11:17:54.337 NSFileManager[5578:133206] Documents目录: /Users/chenlihua/Library/Developer/CoreSimulator/Devices/78D1FCBF-9990-471F-9075-168F2CE949FE/data/Containers/Data/Application/19A5C4E6-8CDD-428A-B08C-FC68363F3980/Documents

2015-10-23 11:17:54.349 NSFileManager[5578:133206] 文件创建成功: /Users/chenlihua/Library/Developer/CoreSimulator/Devices/78D1FCBF-9990-471F-9075-168F2CE949FE/data/Containers/Data/Application/19A5C4E6-8CDD-428A-B08C-FC68363F3980/Documents/test/test.txt

2015-10-23 11:17:54.349 NSFileManager[5578:133206] Documents目录: /Users/chenlihua/Library/Developer/CoreSimulator/Devices/78D1FCBF-9990-471F-9075-168F2CE949FE/data/Containers/Data/Application/19A5C4E6-8CDD-428A-B08C-FC68363F3980/Documents

2015-10-23 11:17:54.350 NSFileManager[5578:133206] 文件写入成功

2015-10-23 11:17:54.350 NSFileManager[5578:133206] Documents目录: /Users/chenlihua/Library/Developer/CoreSimulator/Devices/78D1FCBF-9990-471F-9075-168F2CE949FE/data/Containers/Data/Application/19A5C4E6-8CDD-428A-B08C-FC68363F3980/Documents

2015-10-23 11:17:54.351 NSFileManager[5578:133206] 文件读取成功: 测试写入内容！

2015-10-23 11:17:54.351 NSFileManager[5578:133206] Documents目录: /Users/chenlihua/Library/Developer/CoreSimulator/Devices/78D1FCBF-9990-471F-9075-168F2CE949FE/data/Containers/Data/Application/19A5C4E6-8CDD-428A-B08C-FC68363F3980/Documents

2015-10-23 11:17:54.352 NSFileManager[5578:133206] Key: NSFileOwnerAccountID for value: 501

2015-10-23 11:17:54.352 NSFileManager[5578:133206] Key: NSFileSystemFileNumber for value: 13276863

2015-10-23 11:17:54.353 NSFileManager[5578:133206] Key: NSFileExtensionHidden for value: 0

2015-10-23 11:17:54.353 NSFileManager[5578:133206] Key: NSFileSystemNumber for value: 16777220

2015-10-23 11:17:54.353 NSFileManager[5578:133206] Key: NSFileSize for value: 21

2015-10-23 11:17:54.353 NSFileManager[5578:133206] Key: NSFileGroupOwnerAccountID for value: 80

2015-10-23 11:17:54.353 NSFileManager[5578:133206] Key: NSFilePosixPermissions for value: 420

2015-10-23 11:17:54.355 NSFileManager[5578:133206] Key: NSFileCreationDate for value: 2015-10-23 03:17:54 +0000

2015-10-23 11:17:54.355 NSFileManager[5578:133206] Key: NSFileExtendedAttributes for value: {

    "com.apple.TextEncoding" = <7574662d 383b3133 34323137 393834>;

}

2015-10-23 11:17:54.355 NSFileManager[5578:133206] Key: NSFileType for value: NSFileTypeRegular

2015-10-23 11:17:54.355 NSFileManager[5578:133206] Key: NSFileGroupOwnerAccountName for value: admin

2015-10-23 11:17:54.355 NSFileManager[5578:133206] Key: NSFileReferenceCount for value: 1

2015-10-23 11:17:54.355 NSFileManager[5578:133206] Key: NSFileModificationDate for value: 2015-10-23 03:17:54 +0000

2015-10-23 11:17:54.356 NSFileManager[5578:133206] Documents目录: /Users/chenlihua/Library/Developer/CoreSimulator/Devices/78D1FCBF-9990-471F-9075-168F2CE949FE/data/Containers/Data/Application/19A5C4E6-8CDD-428A-B08C-FC68363F3980/Documents

2015-10-23 11:17:54.356 NSFileManager[5578:133206] 文件删除成功

2015-10-23 11:17:54.356 NSFileManager[5578:133206] 文件是否存在: NO

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