文件名NSString在空间中添加了不必要的％20 [英] File Name NSString adds unnecessary %20 in space

问题描述

已解决（感谢Regexident）

SOLVED (Thanks Regexident)

我有一个应用程序将PDF的文件路径传递给自定义 - （id）init init方法。它被添加到表中，当它被选中时，它会为不存在的文件调用else语句：

I have an app that passes the file path of a PDF to a custom -(id)init init method. It is added to the table and when it is selected, it calls the else statement for a non existent file:

- (void) gridView:(AQGridView *)gridView didSelectItemAtIndex:(NSUInteger)index {

NSLog (@"Selected theArgument=%d\n", index);

UIViewController *viewController = [[[UIViewController alloc]init]autorelease];
{
    //if file is built-in, read from the bundle
    if (index <= 3)
    {
        // first section is our build-in documents
        NSString *fileURLs = [_documentIconsURLs objectAtIndex:index];   
        NSLog(@"file url -%@", fileURLs);
        viewController = [[[xSheetMusicViewController alloc]initWithContentURL:fileURLs]autorelease];
    }
    //if file is external, read from URL
    else
    {
        // second section is the contents of the Documents folder
        NSString *fileURL = [_documentIconsURLs objectAtIndex:index];
        NSLog(@"file url -%@", fileURL);
        NSString *path;
        NSString *documentsDirectoryPath = [self applicationDocumentsDirectory];
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        path = [[paths objectAtIndex:0] stringByAppendingPathComponent:fileURL];


        if ([[NSFileManager defaultManager] fileExistsAtPath:documentsDirectoryPath])
        {
            viewController = [[[xSheetMusicViewController alloc]initWithDocumentURL:fileURL]autorelease];
        }
        else
        {
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Failure!"                                                            message:@"The Selected File Does Not Exist"
                                                           delegate:nil
                                                  cancelButtonTitle:@"OK"
                                                  otherButtonTitles: nil];
            [alert show];
            [alert release];        
            return;
        }
    }
[self.navigationController setNavigationBarHidden:YES animated:NO]; 
[UIView beginAnimations:@"animation" context:nil];
[UIView setAnimationDuration:1];
[UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:self.navigationController.view cache:YES]; 
[self.navigationController pushViewController:viewController animated:NO];
[UIView commitAnimations];  
    }
}

所以每当我有一个没有空格的文件时名字，推动和推动。但是当文件名中有空格时，它表示它不存在。当我删除if-else方法时，它会初始化，但崩溃因为文件不存在。我试图用常规空格替换文件路径中的％20，但该方法继续调用else部分。

So whenever I have a document with no space in it's name, it pushes and inits. But when the file name has a space in it, it says it does not exist. And when I remove the if-else method, it init's, but crashes because the file doesn't exist. I've tried to replace the %20 in the file path with a regular space, but the method continues to call the else part.

那么，文件路径是不标准化和可读的，还是我的其他方法错了？

So, is the file path not standardized and readable, or is my else method wrong?

推荐答案

由于你的路径似乎是一个百分比转义路径字符串，我试试这个：

As your path appears to be a percentage escaped path string I'd try this:

[fileURL stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding]

我要重命名 fileURL 到 fileURLString ，以明确它是一个包含URL路径的NSString，而不是一个实际的NSURL（你的变量名称将错误地暗示）。

And I'd rename fileURL to fileURLString to make clear that it's an NSString containing a URL path, not an actual NSURL (which your variable name would falsely imply).

但是我会检查填充 _documentIconsURLs 的代码，因为它可能是您问题的根源。

But I'd check the code that populates _documentIconsURLs, as it's probabaly the origin of your problem.

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