如何从iPhone的文档目录中删除超过两天的文件

Question

我有一个应用程序,我在其中记录声音文件并将其存储在应用程序文档目录中.

我想要的是,它应该只包含昨天和更旧的文件,并从iPhone应用程序中的文件夹中删除所有其他文件.有没有办法做到这一点？

谢谢 ..

Answer 1

请查看以下代码.

//Get the Document directory path.
 #define kDOCSFOLDER [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]

//Delete files by iterating items of the folder.
NSFileManager* fm = [[[NSFileManager alloc] init] autorelease];
NSDirectoryEnumerator* en = [fm enumeratorAtPath:kDOCSFOLDER];    
NSError* err = nil;
BOOL res;

NSString* file;
while (file = [en nextObject]) {
            // Date comparison.
    NSDate   *creationDate = [[fm attributesOfItemAtPath:file error:nil] fileCreationDate];
    NSDate *yesterDay = [[NSDate date] dateByAddingTimeInterval:(-1*24*60*60)];

    if ([creationDate compare:yesterDay] == NSOrderedAscending)
    {
        // creation date is before the Yesterday date
        res = [fm removeItemAtPath:[kDOCSFOLDER stringByAppendingPathComponent:file] error:&err];

        if (!res && err) {
            NSLog(@"oops: %@", err);
        }

    }

}