GetPathsOperation.m
/* |
File: GetPathsOperation.m |
Abstract: NSOperation code for directory and file enumeration. |
Version: 1.3 |
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*/ |
#import "GetPathsOperation.h" |
#import "LoadOperation.h" |
@interface GetPathsOperation () |
{ |
NSURL *rootURL; |
NSOperationQueue *queue; |
NSInteger ourScanCount; |
} |
@property (retain) NSURL *rootURL; |
@property (retain) NSOperationQueue *queue; |
@end |
@implementation GetPathsOperation |
@synthesize rootURL, queue; |
// ------------------------------------------------------------------------------- |
// initWithRootPath: |
// ------------------------------------------------------------------------------- |
- (id)initWithRootURL:(NSURL *)url queue:(NSOperationQueue *)qq scanCount:(NSInteger)scanCount |
{ |
self = [super init]; |
if (self) |
{ |
self.rootURL = url; |
self.queue = qq; |
ourScanCount = scanCount; |
} |
return self; |
} |
// ------------------------------------------------------------------------------- |
// main: |
// ------------------------------------------------------------------------------- |
- (void)main |
{ |
NSDirectoryEnumerator *itr = |
[[NSFileManager defaultManager] enumeratorAtURL:self.rootURL |
includingPropertiesForKeys:nil |
options:(NSDirectoryEnumerationSkipsHiddenFiles | NSDirectoryEnumerationSkipsPackageDescendants) |
errorHandler:nil]; |
for (NSURL *url in itr) |
{ |
if ([self isCancelled]) |
{ |
break; // user cancelled this operation |
} |
// use NSOperation subclass "LoadOperation" |
LoadOperation *op = [[LoadOperation alloc] initWithURL:url scanCount:ourScanCount]; |
[op setQueuePriority:2.0]; // second priority |
[self.queue addOperation:op]; // this will start the load operation |
} |
} |
@end |
Copyright © 2012 Apple Inc. All Rights Reserved. Terms of Use | Privacy Policy | Updated: 2012-03-27