Question

我经常搜索但未找到任何解决方案。我正在开发创建视频并保存在本地目录的应用程序，并在应用程序的前面屏幕上显示这些已保存的视频。但我想在屏幕上只显示6个最新保存的视频。如何从目录中获取最新的视频路径。请帮忙。

这是我用来获取所有视频文件的代码

[[NSFileManager defaultManager] fileExistsAtPath:DocumentPath 
                                     isDirectory:&isDir];
if ( isDir ) {
    NSMutableArray *contentItemArray = [[NSMutableArray alloc] init];
    NSArray *contentOfDirectory = 
     [[NSFileManager defaultManager] contentsOfDirectoryAtPath:finalDirectory 
                                                         error:NULL];

    for (int i = 0; i<[contentOfDirectory count]; i++) {

        NSString *fileName = [contentOfDirectory objectAtIndex:i];

        if([fileName.pathExtension isEqualToString:@"mov"])
        {
            [contentItemArray addObject:fileName];
        }
   } }

Answer 1

也许您可以尝试搜索创建日期并选择已创建的最后6个，如下所示：

[[NSFileManager defaultManager] fileExistsAtPath:DocumentPath
                                     isDirectory:&isDir];
if ( isDir ) {
    NSMutableArray *contentItemArray = [[NSMutableArray alloc] init];
    NSArray *contentOfDirectory =
    [[NSFileManager defaultManager] contentsOfDirectoryAtPath:finalDirectory
                                                        error:NULL];

    for (int i = 0; i<[contentOfDirectory count]; i++) {

        NSString *fileName = [contentOfDirectory objectAtIndex:i];

        if([fileName.pathExtension isEqualToString:@"mov"])
        {
            [contentItemArray addObject:fileName];
            NSURL *fileUrl = [NSURL URLWithString:DocumentPath];
            NSDate *fileDate;
            [fileName getResourceValue:&fileDate forKey:NSURLContentModificationDateKey error:&error];
            if (!error)
            {
                //here you should be able to read valid date from fileDate variable
            }
        }
    } }*

希望这可以帮到你，否则我们会找到别的事情。

Answer 2

是的，我知道了。使用当前日期保存视频并使用此方法。这将返回排序项数组。

-(NSArray *)getLatestFile:(NSArray *)completedMilestoneArray {

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"dd-MM-yyyy"];


NSArray *sortedKeys = [completedMilestoneArray sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2) {

    NSString *s1 = [[obj1 objectAtIndex:1] stringByDeletingPathExtension];

    NSString *s2 = [[obj2 objectAtIndex:1] stringByDeletingPathExtension];


    NSDate *d1 = [NSDate dateWithTimeIntervalSince1970:(int)s1];


    //NSDate *d1 = [dateFormatter dateFromString:s1];
    NSDate *d2 = [NSDate dateWithTimeIntervalSince1970:(int)s2];

    if ([d2 compare:d1] == NSOrderedAscending)
        return (NSComparisonResult)NSOrderedAscending;
    if ([d2 compare:d1] == NSOrderedDescending)
        return (NSComparisonResult)NSOrderedDescending;
    return (NSComparisonResult)NSOrderedSame;
}];

return sortedKeys;   }

从目录中获取最新保存的文件

2 个答案: