Question

我想将文档目录中的文件列表添加到字符串数组中。不确定如何做到这一点，这是我到目前为止。我想加载/存储只包含单词＆＃39; bottom＆＃39;的文件。在数组中的文件名中。我该怎么做？

 NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];

NSFileManager *fileMan = [[NSFileManager alloc]init];
NSArray *files = [fileMan contentsOfDirectoryAtPath:documentsDirectory error:nil];

for(int i =0; i<files.count; i++){

}
NSString *path = [documentsDirectory stringByAppendingPathComponent:[NSString rangeOfString:@"bottom"]];


//THIS IS HARDCODED ARRAY OF FILE-STRING NAMES
  NSArray *bottomArray =[NSArray arrayWithObjects: @"bottom6D08B918-326D-41E1-8A47-B92F80EF07E5-1240-000005EB14009605.png", @"bottom837C95CF-85B2-456D-8197-326A637F3A5B-6021-0000340042C31C23.png", nil];

Answer 1

您需要检查files数组中的每个文件：

NSFileManager *fileMan = [NSFileManager defaultFileManager];
NSArray *files = [fileMan contentsOfDirectoryAtPath:documentsDirectory error:nil];

NSMutableArray *bottomArray = [NSMutableArray array];
for (NSString *file in files) {
    if ([file rangeOfString:@"bottom"].location != NSNotFound) {
        [bottomArray addObject:file];
    }
}

Answer 2

除了@ rmaddy的方法之外，另一个选择是使用NSPredicate的实例来过滤文件名数组：

NSArray *filenames = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:path error:NULL];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"self contains 'bottom'"];
NSArray *matchedNames = [filenames filteredArrayUsingPredicate:predicate];

将文件字符串名称从Documents Directory加载到数组中

2 个答案: