iOS NSFileManager檔案操作

iOS NSFileManager檔案操作

 

檔案操作常用操作記錄一下：

 //擷取沙箱的根路徑    NSString *dirHome = NSHomeDirectory();    NSLog(@%@,dirHome);    //擷取Documents目錄路徑    NSArray *path = NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory,NSUserDomainMask, YES);    NSString *documentsDirectory = [path objectAtIndex:0];    NSLog(@%@,documentsDirectory);    //擷取Library 目錄路徑    path = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);    NSString *libraryDirectory  = [path objectAtIndex:0];    NSLog(@%@,libraryDirectory);    //擷取caches目錄路徑    path = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);    NSString *caches = [path objectAtIndex:0];    NSLog(@%@,caches);    //擷取Tmp 目錄路徑    NSString *tmpDirectory = NSTemporaryDirectory();    NSLog(@%@,tmpDirectory);    //建立檔案夾    //1 獲得檔案路徑    //2 建立檔案管理工具    //3 用檔案管理工具在目錄上建立檔案    path = NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory,NSUserDomainMask, YES);    documentsDirectory = [path objectAtIndex:0];    documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@test];    NSFileManager *fm = [NSFileManager defaultManager];    BOOL res = [fm createDirectoryAtPath:documentsDirectory 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（與檔案夾的建立相同）    path = NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSUserDomainMask, YES);    documentsDirectory = [path objectAtIndex:0];    documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@text];    documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@123.txt];    fm = [NSFileManager defaultManager];    res = [fm createDirectoryAtPath:documentsDirectory 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);    }    //寫資料到檔案    path = NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSUserDomainMask, YES);    documentsDirectory = [path objectAtIndex:0];    documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@text];    documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@123.txt];    NSString *content = @檔案寫入的內容;    res = [content writeToFile:documentsDirectory atomically:YES encoding:NSUTF8StringEncoding error:nil];    if(res)    {        NSLog(@檔案夾建立成功);    }    else    {        NSLog(@檔案夾建立失敗);    }    //讀檔案資料    path = NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSUserDomainMask, YES);    documentsDirectory = [path objectAtIndex:0];    documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@text];    documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@123.txt];    content  = [NSString stringWithContentsOfFile:documentsDirectory encoding:NSUTF8StringEncoding error:nil];    NSLog(@檔案讀取成功：%@,content);    //檔案的屬性    path = NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSUserDomainMask, YES);    documentsDirectory = [path objectAtIndex:0];    documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@text];    documentsDirectory = [documentsDirectory stringByAppendingPathComponent:@123.txt];    fm = [NSFileManager defaultManager];    NSDictionary *fileAttributes = [fm attributesOfItemAtPath:documentsDirectory error:nil];    NSArray *keys;    id key,value;    keys = [fileAttributes allKeys];    int count = [keys count];    for (int i= 0; i