ios - 获取文档目录中特定文件夹的内容

Question

我正在尝试读取文档目录中仅包含 png 的 /Documents/ApplianceImagesFolder/的特定文件夹的内容

目前我只能从 documents 文件夹中获取我的所有图像，我如何才能只定位 ApplianceImagesFolder 的内容？

 //gets all png form documents folder
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsPath = [paths objectAtIndex:0];
    NSArray *dirContents = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:documentsPath error:nil];
    fileList=[[NSMutableArray alloc]init];
    for (NSString *dir in dirContents) {
        if ([dir hasSuffix:@".png"]) {
            NSRange range = [dir rangeOfString:@"."];
            NSString *name = [dir substringToIndex:range.location];
            if (![name isEqualToString:@""]) {

                [fileList addObject:name];
            }
        }
    } 
    NSLog(@"document folder content list %@ ",fileList);

Answer 1

构建所需的路径:

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0];
NSString *folderPath = [documentsPath stringByAppendingPathComponent:@"ApplianceImagesFolder"];
NSArray *dirContents = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:folderPath error:nil];

还有一个更好的方法来查找 png 文件:

fileList=[[NSMutableArray alloc]init];
for (NSString *filename in dirContents) {
    NSString *fileExt = [filename pathExtension];
    if ([fileExt isEqualToString:@"png"]) {
        [fileList addObject:filename];
    }
} 
NSLog(@"document folder content list %@ ",fileList);