无法使用iCloud同步简单文本文件(错误的文件描述符) [英] Cannot sync simple text file with iCloud (bad file descriptor)
问题描述
我在同步一个简单的文本文件时遇到问题,尝试打开时遇到此错误:
I'm having trouble synching a simple textfile, I get this error when trying to open it:
{NSFilePath = / private / var / mobile /移动文档/ 4C224W52W5〜com〜piso13〜opusDomini / currentLogPath,NSUnderlyingError = 0xde9b460操作无法完成。错误的文件描述符}
{NSFilePath=/private/var/mobile/Library/Mobile Documents/4C224W52W5~com~piso13~opusDomini/currentLogPath, NSUnderlyingError=0xde9b460 "The operation couldn’t be completed. Bad file descriptor"}
-(BOOL)createLogFolderFile{
NSString *uuid = nil;
CFUUIDRef uuidRef = CFUUIDCreate(nil);
uuid = (NSString*)CFUUIDCreateString(nil, uuidRef);
CFRelease(uuidRef);
NSError *error = nil;
[uuid writeToFile:[self filePath] atomically:NO encoding:NSUTF8StringEncoding error:&error];
if (error) {
NSLog(@"Error trying to create log file %@", error);
return FALSE;
}
else{
return TRUE;
}
}
-(NSString*)filePath{
NSFileManager *fileManager = [NSFileManager defaultManager];
NSString *iCloudPath = [[fileManager URLForUbiquityContainerIdentifier:nil] path];
return [iCloudPath stringByAppendingPathComponent:LOG_FOLDER_FILE_NAME];
}
这是我读的方式:
-(NSString*)readLogFolderFromFile{
NSError *error = nil;
NSString *logFolder = [NSString stringWithContentsOfFile:[self filePath] encoding:NSUTF8StringEncoding error:&error];
if (error) {
NSLog(@"Error when trying to read log folder from file: %@" ,error);
return nil;
}
else{
return logFolder;
}
}
使用NSMetadataQuery搜索文件
通知查询完成收集信息结果为正。
I'm using NSMetadataQuery to search for the file, The notification query finish gathering info results positive.
帮助?
推荐答案
文件没有下载。看来NSMetadataQuery通知云中文件的存在。要实际获取文件,需要额外的代码:
The file was not downloaded. It seems NSMetadataQuery notifies about the existence of the file in the cloud. To actually get the file, extra code is needed:
里面的queryDidFinish收集通知:
Inside queryDidFinishGathering notification:
NSMetadataItem *item = [query resultAtIndex:0];
self.metadataItem = item;
BOOL isDownloaded = [[item valueForAttribute:NSMetadataUbiquitousItemIsDownloadedKey]boolValue];
if (!isDownloaded) {
NSError *error = nil;
[[NSFileManager defaultManager] startDownloadingUbiquitousItemAtURL: [item valueForAttribute:NSMetadataItemURLKey] error:&error];
NSLog(@"Start downloading file");
if (error) {
NSLog(@"Error trying to download file: %@", error);
}
else{
[self lookForLogFolderFile];
return;
}
}
lookForLogFolderFile只是重新开始查询。
多次调用后,我的项目被下载。您还可以在每次调用之间使用计时器来启动NSMetadataQuery。在我的情况下,只是一行文本文件。
The lookForLogFolderFile simply starts the query again. After several calls my item gets downloaded. You can also use a timer to between each call to start a NSMetadataQuery. In my case, is just a text file with one line.
这篇关于无法使用iCloud同步简单文本文件(错误的文件描述符)的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!