iphone：從文件目錄文件夾複製或移動文件

這是我的代碼。iphone：從文件目錄文件夾複製或移動文件

NSArray *pathSong = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
    NSString *toPath = [[pathSong objectAtIndex:0] stringByAppendingPathComponent:@"Songs"]; 
    NSString *fromPath=[[pathSong objectAtIndex:0] stringByAppendingPathComponent:@"abc"]; 
    NSString *strdestination = [fromPath stringByAppendingPathComponent:@"sg.mp3"]; 
    NSError *Error; 
    if([[NSFileManager defaultManager]fileExistsAtPath:strdestination]){ 
     if([[NSFileManager defaultManager]copyItemAtPath:strdestination toPath:toPath error:&Error]==NO){ 
      UIAlertView *Alert=[[UIAlertView alloc]initWithTitle:@"copy" message:[NSString stringWithFormat:@"%@",Error] delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil]; 
      [Alert show]; 
     } 
     else{ 
      UIAlertView *Alert=[[UIAlertView alloc]initWithTitle:@"Not copy" message:[NSString stringWithFormat:@"%@",Error] delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil]; 
      [Alert show]; 
     } 
    }

我得到了錯誤的標誌：

錯誤域= NSCocoaErrorDominCode = 516 「的操作無法完成（可可箭頭516）」 USERINFO = 0x681abf0

NSUnderlyingError = 0x681b920「操作無法完成。文件存在」

abc文件夾沒有歌曲名稱「sg.mp3」，但我仍然收到文件存在錯誤。我不知道我犯了什麼錯誤？

來源

2012-08-17 user1606762

你能在你的代碼中設置代碼標籤嗎？ – BergP 2012-08-17 11:44:41

您正試圖將一個文件複製到另一個文件上？ – FaddishWorm 2012-08-17 11:46:02

@ FaddishWorm：我想將一個文件複製到另一個文件夾。 – user1606762 2012-08-17 11:52:40

。在你的代碼的兩個問題：

您需要刪除該文件它已經在那裏
您需要指定目標文件的名稱，意思是如果您使用像：

NSString *toPath = [[pathSong objectAtIndex:0] stringByAppendingPathComponent:@"Songs"];

和

[[NSFileManager defaultManager]copyItemAtPath:strdestination toPath:toPath error:&Error];

如果發生複製之後，它將Sg.mp3文件拷貝的歌曲沒有任何類型的。

所以你需要把它寫，如：

NSArray *pathSong = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *tempPath = [[pathSong objectAtIndex:0] stringByAppendingPathComponent:@"Songs"]; 
NSString *toPath = [tempPath stringByAppendingPathComponent:@"yourFileName.mp3"]; 
NSString *fromPath = [[pathSong objectAtIndex:0] stringByAppendingPathComponent:@"abc"]; 
NSString *strdestination = [fromPath stringByAppendingPathComponent:@"sg.mp3"]; 
NSError *Error = nil; 

if([[NSFileManager defaultManager]fileExistsAtPath:strdestination]) 
{ 

    if([[NSFileManager defaultManager]copyItemAtPath:strdestination toPath:toPath error:&Error]==NO) 
    { 
     UIAlertView *Alert=[[UIAlertView alloc]initWithTitle:@"copy" message:[NSString stringWithFormat:@"%@",Error] delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil]; 
     [Alert show]; 
    } 
    else 
    { 
     [fileManager removeItemAtPath:strdestination error:NULL]; 
     UIAlertView *Alert=[[UIAlertView alloc]initWithTitle:@"Not copy" message:[NSString stringWithFormat:@"%@",Error] delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil]; 
     [Alert show]; 
    } 
}

此代碼是否存在於目的地將刪除該文件，然後從abc文件夾名稱yourFileName.mp3

來源

2012-08-17 17:31:19

必須手動創建目錄。代碼在下面給出的答案中提及。 – AnkitRox 2015-05-14 13:17:14

我認爲它是因爲你試圖用你的副本覆蓋文件。

檢查您的權限掩碼，請嘗試使用緩存而不是文檔目錄。

你的意思if(!fileExistsAtPath)

來源

2012-08-17 11:48:58 FaddishWorm

你需要刪除已經存在的文件：

NSArray *pathSong = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *toPath = [[pathSong objectAtIndex:0] stringByAppendingPathComponent:@"Songs"]; 
NSString *fromPath=[[pathSong objectAtIndex:0] stringByAppendingPathComponent:@"abc"]; 
NSString *strdestination = [fromPath stringByAppendingPathComponent:@"sg.mp3"]; 
NSError *Error; 


//DELETE THE FILE AT THE LOCATION YOU'RE COPYING TO 
NSFileManager *fileManager = [NSFileManager defaultManager]; 
[fileManager removeItemAtPath:strdestination error:NULL]; 


if([[NSFileManager defaultManager]copyItemAtPath:strdestination toPath:toPath error:&Error]==NO){ 
     UIAlertView *Alert=[[UIAlertView alloc]initWithTitle:@"copy" message:[NSString stringWithFormat:@"%@",Error] delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil]; 
     [Alert show]; 
    } 
else{ 
     UIAlertView *Alert=[[UIAlertView alloc]initWithTitle:@"Not copy" message:[NSString stringWithFormat:@"%@",Error] delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil]; 
     [Alert show]; 
    }

來源

2012-08-17 11:50:50

在吸取複製sg.mp3到Songs文件夾Midhun MP答案，這裏是一個幫手

BOOL moveFile(NSString *srcPath, NSString *dstPath) 
{ 
    NSLog(@"moving %@ -> %@", srcPath, dstPath); 

    NSFileManager *fm = [NSFileManager defaultManager]; 
    if ([fm fileExistsAtPath:dstPath]) 
    { 
     // in my usecase this is a hard error, bolt to prevent overwriting 
     return NO; 
    } 

    if ([fm fileExistsAtPath:srcPath]) 
    { 
     NSError *error = nil; 
     NSString *destDir = [dstPath stringByDeletingLastPathComponent]; 
     [fm createDirectoryAtPath:destDir withIntermediateDirectories:YES attributes:nil error:nil]; 

     if ([[NSFileManager defaultManager] copyItemAtPath:srcPath toPath:dstPath error:&error]==NO) 
     { 
      NSLog(@"failure declassing %@", srcPath); 
      return NO; 
     } 
     else 
     { 
      [fm removeItemAtPath:srcPath error:NULL]; // gr8t success 
      return YES; 
     } 
    } 

    return NO; 
}

來源

2015-02-04 12:50:01

iphone：從文件目錄文件夾複製或移動文件

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