文件写入失败Error Domain=NSCocoaErrorDomain Code=512 "未能将文件“jquery_1_10_2_min.js”存储到文件夹“Q20180104153006399”中。"

NSFileManager *fileManager = [NSFileManager defaultManager];NSString *zhenggedizhi1 = [documentsDirectoryPath stringByAppendingString:[NSString stringWithFormat:@"/%@/Q20180104153006399",@"OralQuesBank"]];[fileManager createDirectoryAtPath:zhenggedizhi1 withIntermediateDirectories:YES attributes:nil error:nil];

/** 下载FTP资源 */
#import "GRRequestsManager.h"
#import "GRListingRequest.h"
#import "FCFileManager.h"
<GRRequestsManagerDelegate>
@property (nonatomic, strong) GRRequestsManager *requestsManager;

- (void)viewDidLoad {[super viewDidLoad];// Do any additional setup after loading the view.self.view.backgroundColor = [UIColor orangeColor];
UIButton *downBtn = [UIButton buttonWithType:UIButtonTypeCustom];[downBtn setTitle:@"下载" forState:UIControlStateNormal];downBtn.backgroundColor = [UIColor cyanColor];[downBtn addTarget:self action:@selector(startDownClick) forControlEvents:UIControlEventTouchUpInside];[self.view addSubview:downBtn];[downBtn mas_makeConstraints:^(MASConstraintMaker *make) {make.center.equalTo(self.view);make.size.mas_equalTo(CGSizeMake(50, 40));}];
}- (void)startDownClick{//列表localuser下的文件夹目录，这里做的只是列表目录下面有什么[self.requestsManager addRequestForListDirectoryAtPath:@"OralQuesBank/Q20180104153006399"];
    [self.requestsManager startProcessingRequests];
}
#pragma mark *** GRRequestsManagerDelegate ***
//代理方法，每次执行列表方法都会走这个方法
- (void)requestsManager:(id<GRRequestsManagerProtocol>)requestsManager didCompleteListingRequest:(id<GRRequestProtocol>)request listing:(NSArray *)listing{//沙盒目录NSString *documentsDirectoryPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];GRListingRequest *req = (GRListingRequest *)request;//远程文件夹列表NSLog(@"%@",listing);//打印创建的目录NSLog(@"%@",documentsDirectoryPath);NSFileManager *fileManager = [NSFileManager defaultManager];NSString *zhenggedizhi1 = [documentsDirectoryPath stringByAppendingString:[NSString stringWithFormat:@"/%@/Q20180104153006399",@"OralQuesBank"]];[fileManager createDirectoryAtPath:zhenggedizhi1 withIntermediateDirectories:YES attributes:nil error:nil];//文件夹列表枚举[listing enumerateObjectsUsingBlock:^(id  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {　　　　if ([[obj pathExtension] isEqualToString:@""]) {//整个地址，在沙盒中创建和远程文件一样的文件夹目录NSString *zhenggedizhi = [documentsDirectoryPath stringByAppendingString:[NSString stringWithFormat:@"%@/%@",req.path,obj]];//如果沙盒中的这个文件夹不存在就创建if (![fileManager fileExistsAtPath:zhenggedizhi]) {[fileManager createDirectoryAtPath:zhenggedizhi withIntermediateDirectories:YES attributes:nil error:nil];}//然后接着递归列举文件夹下的子文件夹下的目录[self.requestsManager addRequestForListDirectoryAtPath:[NSString stringWithFormat:@"%@%@",req.path,obj]];[self.requestsManager startProcessingRequests];}else{//如果目录下的不是文件夹，则下载这个文件到沙盒的指定目录下NSString *zhenggedizhi = [documentsDirectoryPath stringByAppendingString:[NSString stringWithFormat:@"%@/%@",req.path,obj]];//如果沙盒中的这个文件夹不存在就创建if (![fileManager fileExistsAtPath:zhenggedizhi]) {[fileManager createDirectoryAtPath:zhenggedizhi withIntermediateDirectories:YES attributes:nil error:nil];}[self.requestsManager addRequestForDownloadFileAtRemotePath:[NSString stringWithFormat:@"%@/%@",req.path,obj] toLocalPath:[documentsDirectoryPath stringByAppendingPathComponent:[NSString stringWithFormat:@"%@%@",req.path,obj]]];[self.requestsManager startProcessingRequests];}}];}
- (void)requestsManager:(id<GRRequestsManagerProtocol>)requestsManager didFailRequest:(id<GRRequestProtocol>)request withError:(NSError *)error
{NSLog(@"请求失败requestsManager:didFailRequest:withError: \n %@", error);//    NSString *errorStr = [NSString stringWithFormat:@"%@",error];
//    [self downLoadFail];//可添加处理下载失败后自己的删除文件夹路径方法
}- (void)requestsManager:(id<GRRequestsManagerProtocol>)requestsManager didFailWritingFileAtPath:(NSString *)path forRequest:(id<GRDataExchangeRequestProtocol>)request error:(NSError *)error{LSLog(@"文件写入失败%@",error);
}- (void)requestsManagerDidCompleteQueue:(id<GRRequestsManagerProtocol>)requestsManager{LSLog(@"整个文件夹下载完成+++++++++++++++++");
}#pragma mark - layzy
- (GRRequestsManager *)requestsManager{if (!_requestsManager) {_requestsManager = [[GRRequestsManager alloc] initWithHostname:@"ftp://11.11.111.11:12" user:@"Administrator" password:@"这是ftp密码"];// 设置代理_requestsManager.delegate = self;}return _requestsManager;
}