文件刪除代碼

Question

我想使用從目錄文件夾中獲取照片的CollectionView刪除圖片，因爲我已經創建了子目錄來存儲圖像。

-(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{ 

    NSLog(@"ray:%d", [Trash count]); 
    NSString *trashBin = [Trash objectAtIndex:indexPath.row]; 
    NSLog(@"k%@l",trashBin); 


} 

這是我的代碼刪除，但我必須添加我不知道的文件刪除代碼。

Answer 1

我相信以下是你在找什麼。

NSError *error; 
NSString *myFileName; 
// this is global variable 


-(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{ 

    NSLog(@"ray:%d", [Trash count]); 
    NSString *myFileName = [Trash objectAtIndex:indexPath.row]; 

    NSLog(@"k%@l",myFileName); 
    [self deleteMyFiles]; 



} 

-(void) deleteMyFiles { 
    NSFileManager *fileMgr = [NSFileManager defaultManager]; 

    // Point to Document directory 
    NSString *documentsDirectory = [NSHomeDirectory() 
     stringByAppendingPathComponent:@"Documents"]; 

    NSString *filePath2 = [documentsDirectory 
          stringByAppendingPathComponent:myFileName]; 

    if ([fileMgr removeItemAtPath:filePath2 error:&error] != YES) 
     NSLog(@"Unable to delete file: %@", [error localizedDescription]); 
} 

欲瞭解更多詳情，請訪問，

http://iosdevelopertips.com/data-file-management/iphone-file-system-creating-renaming-and-deleting-files.html

這個環節有操作的所有實例做文件。

---

你得到這個是因爲你沒有設置錯誤。

NSError *myFileName;

NSError *error; 
NSString *myFileName; 
// this is global variable