文件名 NSString 在空格中添加了不必要的 %20
已解决(感谢 Regexident)
我有一个应用程序,它将 PDF 的文件路径传递给自定义 -(id)init
init 方法。它被添加到表中,当它被选择时,它会为不存在的文件调用 else 语句:
- (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];
}
}
因此,每当我有一个名称中没有空格的文档时,它就会推送并初始化。但当文件名中有空格时,则表示该文件不存在。当我删除 if-else 方法时,它会初始化,但由于文件不存在而崩溃。我尝试将文件路径中的 %20 替换为常规空格,但该方法继续调用 else 部分。
那么,是文件路径不规范、不可读,还是我的else方法错误呢?
SOLVED (Thanks Regexident)
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];
}
}
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.
So, is the file path not standardized and readable, or is my else method wrong?
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由于您的路径似乎是百分比转义路径字符串,我会尝试这样做:
并且我会将
fileURL
重命名为fileURLString
以明确它是一个包含 URL 路径的 NSString ,而不是实际的 NSURL(您的变量名称会错误地暗示)。但我会检查填充
_documentIconsURLs
的代码,因为它可能是问题的根源。As your path appears to be a percentage escaped path string I'd try this:
And I'd rename
fileURL
tofileURLString
to make clear that it's an NSString containing a URL path, not an actual NSURL (which your variable name would falsely imply).But I'd check the code that populates
_documentIconsURLs
, as it's probabaly the origin of your problem.