【代碼筆記】iOS-NSFileManager，ios-nsfilemanager

【代碼筆記】iOS-NSFileManager，ios-nsfilemanager

一，代碼。

#import "ViewController.h"@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.        //擷取應用沙箱根路徑    [self dirHome];    //擷取Documents目錄    [self dirDoc];    //擷取Library目錄    [self dirLib];    //擷取Cache目錄    [self dirCache];    //建立檔案夾     [self createDir];    //建立檔案    [self createFile];    //寫資料到檔案    [self writeFile];    //讀檔案    [self readFile];    //檔案屬性    [self fileAttriutes];    //刪除檔案    [self deleteFile];            }#pragma -mark -funcitons//擷取應用沙箱根路徑-(void)dirHome{    NSString *dirHome=NSHomeDirectory();    NSLog(@"應用沙箱根路徑: %@",dirHome);}//擷取Documents目錄-(NSString *)dirDoc{    //[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);    NSString *documentsDirectory = [paths objectAtIndex:0];    NSLog(@"Documents目錄: %@",documentsDirectory);    return documentsDirectory;}//擷取Library目錄-(void)dirLib{    //[NSHomeDirectory() stringByAppendingPathComponent:@"Library"];    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);    NSString *libraryDirectory = [paths objectAtIndex:0];    NSLog(@"Library目錄: %@",libraryDirectory);}//擷取Cache目錄-(void)dirCache{    NSArray *cacPath = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);    NSString *cachePath = [cacPath objectAtIndex:0];    NSLog(@"Cache目錄: %@",cachePath);}//擷取Tmp目錄-(void)dirTmp{    //[NSHomeDirectory() stringByAppendingPathComponent:@"tmp"];    NSString *tmpDirectory = NSTemporaryDirectory();    NSLog(@"Tmp目錄: %@",tmpDirectory);}//建立檔案夾-(void)createDir{        NSString *documentsPath =[self dirDoc];    NSFileManager *fileManager = [NSFileManager defaultManager];    NSString *testDirectory = [documentsPath stringByAppendingPathComponent:@"test"];    // 建立目錄    BOOL res=[fileManager createDirectoryAtPath:testDirectory withIntermediateDirectories:YES attributes:nil error:nil];    if (res) {        NSLog(@"檔案夾建立成功");    }else{        NSLog(@"檔案夾建立失敗");    }}//建立檔案-(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(@"檔案建立成功: %@" ,testPath);    }else        NSLog(@"檔案建立失敗");}//寫資料到檔案-(void)writeFile{    NSString *documentsPath =[self dirDoc];    NSString *testDirectory = [documentsPath stringByAppendingPathComponent:@"test"];    NSString *testPath = [testDirectory stringByAppendingPathComponent:@"test.txt"];    NSString *content=@"測試寫入內容！";    BOOL res=[content writeToFile:testPath atomically:YES encoding:NSUTF8StringEncoding error:nil];    if (res) {        NSLog(@"檔案寫入成功");    }else        NSLog(@"檔案寫入失敗");}//讀檔案-(void)readFile{    NSString *documentsPath =[self dirDoc];    NSString *testDirectory = [documentsPath stringByAppendingPathComponent:@"test"];    NSString *testPath = [testDirectory stringByAppendingPathComponent:@"test.txt"];    //    NSData *data = [NSData dataWithContentsOfFile:testPath];    //    NSLog(@"檔案讀取成功: %@",[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);    NSString *content=[NSString stringWithContentsOfFile:testPath encoding:NSUTF8StringEncoding error:nil];    NSLog(@"檔案讀取成功: %@",content);}//檔案屬性-(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);    }}//刪除檔案-(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(@"檔案刪除成功");    }else        NSLog(@"檔案刪除失敗");        NSLog(@"檔案是否存在: %@",[fileManager isExecutableFileAtPath:testPath]?@"YES":@"NO");}@end

 

二，輸出。

2015-10-23 11:17:54.335 NSFileManager[5578:133206] 應用沙箱根路徑: /Users/chenlihua/Library/Developer/CoreSimulator/Devices/78D1FCBF-9990-471F-9075-168F2CE949FE/data/Containers/Data/Application/19A5C4E6-8CDD-428A-B08C-FC68363F39802015-10-23 11:17:54.336 NSFileManager[5578:133206] Documents目錄: /Users/chenlihua/Library/Developer/CoreSimulator/Devices/78D1FCBF-9990-471F-9075-168F2CE949FE/data/Containers/Data/Application/19A5C4E6-8CDD-428A-B08C-FC68363F3980/Documents2015-10-23 11:17:54.336 NSFileManager[5578:133206] Library目錄: /Users/chenlihua/Library/Developer/CoreSimulator/Devices/78D1FCBF-9990-471F-9075-168F2CE949FE/data/Containers/Data/Application/19A5C4E6-8CDD-428A-B08C-FC68363F3980/Library2015-10-23 11:17:54.337 NSFileManager[5578:133206] Cache目錄: /Users/chenlihua/Library/Developer/CoreSimulator/Devices/78D1FCBF-9990-471F-9075-168F2CE949FE/data/Containers/Data/Application/19A5C4E6-8CDD-428A-B08C-FC68363F3980/Library/Caches2015-10-23 11:17:54.337 NSFileManager[5578:133206] Documents目錄: /Users/chenlihua/Library/Developer/CoreSimulator/Devices/78D1FCBF-9990-471F-9075-168F2CE949FE/data/Containers/Data/Application/19A5C4E6-8CDD-428A-B08C-FC68363F3980/Documents2015-10-23 11:17:54.337 NSFileManager[5578:133206] 檔案夾建立成功2015-10-23 11:17:54.337 NSFileManager[5578:133206] Documents目錄: /Users/chenlihua/Library/Developer/CoreSimulator/Devices/78D1FCBF-9990-471F-9075-168F2CE949FE/data/Containers/Data/Application/19A5C4E6-8CDD-428A-B08C-FC68363F3980/Documents2015-10-23 11:17:54.349 NSFileManager[5578:133206] 檔案建立成功: /Users/chenlihua/Library/Developer/CoreSimulator/Devices/78D1FCBF-9990-471F-9075-168F2CE949FE/data/Containers/Data/Application/19A5C4E6-8CDD-428A-B08C-FC68363F3980/Documents/test/test.txt2015-10-23 11:17:54.349 NSFileManager[5578:133206] Documents目錄: /Users/chenlihua/Library/Developer/CoreSimulator/Devices/78D1FCBF-9990-471F-9075-168F2CE949FE/data/Containers/Data/Application/19A5C4E6-8CDD-428A-B08C-FC68363F3980/Documents2015-10-23 11:17:54.350 NSFileManager[5578:133206] 檔案寫入成功2015-10-23 11:17:54.350 NSFileManager[5578:133206] Documents目錄: /Users/chenlihua/Library/Developer/CoreSimulator/Devices/78D1FCBF-9990-471F-9075-168F2CE949FE/data/Containers/Data/Application/19A5C4E6-8CDD-428A-B08C-FC68363F3980/Documents2015-10-23 11:17:54.351 NSFileManager[5578:133206] 檔案讀取成功: 測試寫入內容！2015-10-23 11:17:54.351 NSFileManager[5578:133206] Documents目錄: /Users/chenlihua/Library/Developer/CoreSimulator/Devices/78D1FCBF-9990-471F-9075-168F2CE949FE/data/Containers/Data/Application/19A5C4E6-8CDD-428A-B08C-FC68363F3980/Documents2015-10-23 11:17:54.352 NSFileManager[5578:133206] Key: NSFileOwnerAccountID for value: 5012015-10-23 11:17:54.352 NSFileManager[5578:133206] Key: NSFileSystemFileNumber for value: 132768632015-10-23 11:17:54.353 NSFileManager[5578:133206] Key: NSFileExtensionHidden for value: 02015-10-23 11:17:54.353 NSFileManager[5578:133206] Key: NSFileSystemNumber for value: 167772202015-10-23 11:17:54.353 NSFileManager[5578:133206] Key: NSFileSize for value: 212015-10-23 11:17:54.353 NSFileManager[5578:133206] Key: NSFileGroupOwnerAccountID for value: 802015-10-23 11:17:54.353 NSFileManager[5578:133206] Key: NSFilePosixPermissions for value: 4202015-10-23 11:17:54.355 NSFileManager[5578:133206] Key: NSFileCreationDate for value: 2015-10-23 03:17:54 +00002015-10-23 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: NSFileTypeRegular2015-10-23 11:17:54.355 NSFileManager[5578:133206] Key: NSFileGroupOwnerAccountName for value: admin2015-10-23 11:17:54.355 NSFileManager[5578:133206] Key: NSFileReferenceCount for value: 12015-10-23 11:17:54.355 NSFileManager[5578:133206] Key: NSFileModificationDate for value: 2015-10-23 03:17:54 +00002015-10-23 11:17:54.356 NSFileManager[5578:133206] Documents目錄: /Users/chenlihua/Library/Developer/CoreSimulator/Devices/78D1FCBF-9990-471F-9075-168F2CE949FE/data/Containers/Data/Application/19A5C4E6-8CDD-428A-B08C-FC68363F3980/Documents2015-10-23 11:17:54.356 NSFileManager[5578:133206] 檔案刪除成功2015-10-23 11:17:54.356 NSFileManager[5578:133206] 檔案是否存在: NO