我正在 iPhone 项目中进行一些文件操作。我需要在哪里搜索特定扩展名的文件。一种选择是手动处理要查找的每个文件和目录。我的问题是，有没有简单的方法可以做到这一点？
谢谢
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8380 次
6 回答
6
看到使用NSFileManager你可以获取文件并在下面的条件下你可以获取具有特定扩展名的文件，它在文档目录中工作..
-(NSArray *)findFiles:(NSString *)extension
{
NSMutableArray *matches = [[NSMutableArray alloc]init];
NSFileManager *manager = [NSFileManager defaultManager];
NSString *item;
NSArray *contents = [manager contentsOfDirectoryAtPath:[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] error:nil];
for (item in contents)
{
if ([[item pathExtension]isEqualToString:extension])
{
[matches addObject:item];
}
}
return matches;
}
将此数组与您搜索的文件一起使用..获取NSArray类型的返回，因此使用NSArray对象来存储此数据...
我希望这对你有帮助......
于 2013-01-01T12:13:32.777 回答
3
我还没有发现任何我可以说很简单的事情，最后我必须编写自己的代码来做到这一点。我在这里发布这个是因为也许有人觉得这个帮助很完整。
-(void)search{
@autoreleasepool {
NSString *baseDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSFileManager *defFM = [NSFileManager defaultManager];
BOOL isDir = YES;
NSArray *fileTypes = [[NSArray alloc] initWithObjects:@"mp3",@"mp4",@"avi",nil];
NSMutableArray *mediaFiles = [self searchfiles:baseDir ofTypes:fileTypes];
NSString *docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *filePath = [docDir stringByAppendingPathComponent:@"playlist.plist"];
if(![defFM fileExistsAtPath:filePath isDirectory:&isDir]){
[defFM createFileAtPath:filePath contents:nil attributes:nil];
}
NSMutableDictionary *playlistDict = [[NSMutableDictionary alloc]init];
for(NSString *path in mediaFiles){
NSLog(@"%@",path);
[playlistDict setValue:[NSNumber numberWithBool:YES] forKey:path];
}
[playlistDict writeToFile:filePath atomically:YES];
[[NSNotificationCenter defaultCenter] postNotificationName:@"refreshplaylist" object:nil];
}
}
现在递归方法
-(NSMutableArray*)searchfiles:(NSString*)basePath ofTypes:(NSArray*)fileTypes{
NSMutableArray *files = [[[NSMutableArray alloc]init] autorelease];
NSFileManager *defFM = [NSFileManager defaultManager];
NSError *error = nil;
NSArray *dirPath = [defFM contentsOfDirectoryAtPath:basePath error:&error];
for(NSString *path in dirPath){
BOOL isDir;
path = [basePath stringByAppendingPathComponent:path];
if([defFM fileExistsAtPath:path isDirectory:&isDir] && isDir){
[files addObjectsFromArray:[self searchfiles:path ofType:fileTypes]];
}
}
NSArray *mediaFiles = [dirPath pathsMatchingExtensions:fileTypes];
for(NSString *fileName in mediaFiles){
fileName = [basePath stringByAppendingPathComponent:fileName];
[files addObject:fileName];
}
return files;
}
于 2013-01-04T06:12:00.017 回答
3
您需要的是一种递归方法，以便您可以处理子目录。以下方法中的第一个是公共的；另一个私人。想象一下，它们被实现为一个名为的类的静态方法CocoaUtil：
CocoaUtil.h：
@interface CocoaUtil : NSObject
+ (NSArray *)findFilesWithExtension:(NSString *)extension
inFolder:(NSString *)folder;
@end
CocoaUtil.m:
// Private Methods
@interface CocoaUtil ()
+ (NSArray *)_findFilesWithExtension:(NSString *)extension
inFolder:(NSString *)folder
andSubFolder:(NSString *)subFolder;
@end
@implementation CocoaUtil
+ (NSArray *)findFilesWithExtension:(NSString *)extension
inFolder:(NSString *)folder
{
return [CocoaUtil _findFilesWithExtension:extension
inFolder:folder
andSubFolder:nil];
}
+ (NSArray *)_findFilesWithExtension:(NSString *)extension
inFolder:(NSString *)folder
andSubFolder:(NSString *)subFolder
{
NSMutableArray *found = [NSMutableArray array];
NSString *fullPath = (subFolder != nil) ? [folder stringByAppendingPathComponent:subFolder] : folder;
NSFileManager *fileman = [NSFileManager defaultManager];
NSError *error;
NSArray *contents = [fileman contentsOfDirectoryAtPath:fullPath error:&error];
if (contents == nil)
{
NSLog(@"Failed to find files in folder '%@': %@", fullPath, [error localizedDescription]);
return nil;
}
for (NSString *file in contents)
{
NSString *subSubFolder = subFolder != nil ? [subFolder stringByAppendingPathComponent:file] : file;
fullPath = [folder stringByAppendingPathComponent:subSubFolder];
NSError *error = nil;
NSDictionary *attributes = [fileman attributesOfItemAtPath:fullPath error:&error];
if (attributes == nil)
{
NSLog(@"Failed to get attributes of file '%@': %@", fullPath, [error localizedDescription]);
continue;
}
NSString *type = [attributes objectForKey:NSFileType];
if (type == NSFileTypeDirectory)
{
NSArray *subContents = [CocoaUtil _findFilesWithExtension:extension inFolder:folder andSubFolder:subSubFolder];
if (subContents == nil)
return nil;
[found addObjectsFromArray:subContents];
}
else if (type == NSFileTypeRegular)
{
// Note: case sensitive comparison!
if ([[fullPath pathExtension] isEqualToString:extension])
{
[found addObject:fullPath];
}
}
}
return found;
}
@end
这将返回一个数组，其中包含具有指定文件扩展名的每个文件的完整路径。请注意，[NSString pathExtension]不返回.文件扩展名的，因此请确保不要在extension参数中传递它。
于 2013-01-02T13:13:13.490 回答
1
使用下面的代码
NSArray *myFiles = [myBundle pathsForResourcesOfType:@"Your File extension"
inDirectory:nil];
于 2013-11-25T10:27:48.010 回答
1
是的，我们有下面的 NSArray 直接方法可以帮助您
NSMutableArray *arrayFiles = [[NSMutableArray alloc] initWithObjects:@"a.png", @"a.jpg", @"a.pdf", @"h.png", @"f.png", nil];
NSLog(@"pathsMatchingExtensions----%@",[arrayFiles pathsMatchingExtensions:[NSArray arrayWithObjects:@"png", nil]]);
//my output is
"a.png",
"h.png",
"f.png"
于 2013-01-01T12:51:50.887 回答
1
像这样你可以找到你的特定文件扩展名
NSString *bundleRoot = [[NSBundle mainBundle] bundlePath];
NSFileManager *manager = [NSFileManager defaultManager];
NSDirectoryEnumerator *direnum = [manager enumeratorAtPath:bundleRoot];
NSString *filename;
while ((filename = [direnum nextObject] )) {
if ([filename hasSuffix:@".doc"]) { //change the suffix to what you are looking for
[arrayListofFileName addObject:[filename stringByDeletingPathExtension]];
}
}
于 2013-01-02T12:59:47.670 回答