ios - 使用 NSDocumentDirectory 从 localPath 中删除每个单独的图像

Question

您好，我将一些图像存储在 NSDocuments 目录中的一个文件夹中，我可以存储文件，但无法删除每个人。当我尝试删除文件时，整个文件夹将被删除。

这是我要存储和删除的示例代码。

这是我存储文件的路径:

/Users/emantras/Library/Application Support/iPhone Simulator/7.0.3/Applications/E5D35472-6845-4BCE-98CC-3F852FF52212/Documents/uplo‌​adedpicturecard/ram_1394445189.065911.jpg

但是当我删除时，我得到的路径如下:

/Users/emantras/Library/Application Support/iPhone Simulator/7.0.3/Applications/E5D35472-6845-4BCE-98CC-3F852FF52212/Documents/uplo‌​adedpicturecard

你能帮我完成我的代码吗:

-(void)saveFile
{
 UIImage *imageToUpload = [pictureCardInfo objectForKey:UIImagePickerControllerOriginalImage];
    DBWrapper *dbwrapper = [DBWrapper sharedWrapper];
    NSTimeInterval timeStamp = [[NSDate date] timeIntervalSince1970];
    // NSTimeInterval is defined as double
    NSNumber *timeStampObj = [NSNumber numberWithDouble: timeStamp];

  //  ////NSLog(@"image file name: %@",timeStampObj);
    fileName1 =[_txtView.text stringByAppendingString: [NSString stringWithFormat:@"_%@",timeStampObj]];

    fileName1 = [fileName1 stringByAppendingString:@".jpg"];

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
   filePath = [[documentsDirectory stringByAppendingPathComponent:@"/uploadedpicturecard"] stringByAppendingPathComponent:fileName1];

    ////NSLog(@"filePath===>%@",filePath);

    NSData *imageData = [NSData dataWithData:UIImageJPEGRepresentation(imageToUpload, 1.0)];
[imageData writeToFile:filePath atomically:YES]
}

-(void)removeFile
{
 NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentsDirectoryPath = [paths objectAtIndex:0];

        fileName1 = [fileName1 stringByAppendingString:@".jpg"];
        filePath = [[documentsDirectoryPath stringByAppendingPathComponent:@"/uploadedpicturecard"] stringByAppendingPathComponent:fileName1];
        ////NSLog(@"FileName====>%@",filePath);

        NSFileManager *fileManager = [NSFileManager defaultManager];
        [fileManager removeItemAtPath:filePath error:NULL];
}

Answer 1

cOrderPath 是保存所有图片的目录路径。

现在首先调用下面的代码，它将在删除之前对所有图像进行计数

  NSFileManager *fileManager = [NSFileManager defaultManager];
        filesForDetails = [fileManager contentsOfDirectoryAtPath:self.cOrderPath error:nil];

        iOrderCount=[filesForDetails count];
        iIndex=0;

之后调用CallForDeletion函数

[self CallForDeletion];

稍后此函数将递归删除所有图像。一旦 iIndex==iOrderCount 然后从函数返回

-(void)CallForDeletion
    {
        NSFileManager *fileManager = [NSFileManager defaultManager];
        filesForDetails = [fileManager contentsOfDirectoryAtPath:self.cOrderPath error:nil];
         NSString *file=filesForDetails[0];
         NSString *cFilePath=[self.cOrderPath stringByAppendingPathComponent:file];
         [fileManager removeItemAtPath:cFilePath error:nil];
        iIndex=+1;

        if(iIndex==iOrderCount)
        {
          //Done with Deletion so return
        return;
        }

        [self CallForDeletion];//To call recursively
    }