在我的iOS应用程序中，我将一些文件存储到iCloud Drive文件夹进行备份。现在我想检索该文件，但我不知道哪种方法是正确的。我的意思是是否有特定的iCloud Drive方法，还是我可以从URL获取它。
我像这样将文件存储到iCloud（https://dev59.com/B18d5IYBdhLWcg3wNQNg#27358392）：
我像这样将文件存储到iCloud（https://dev59.com/B18d5IYBdhLWcg3wNQNg#27358392）：
- (void) storeToIcloud
{
// Let's get the root directory for storing the file on iCloud Drive
[self rootDirectoryForICloud:^(NSURL *ubiquityURL) {
if (ubiquityURL) {
// We also need the 'local' URL to the file we want to store
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0]; //Get the docs directory
NSString *filePath = [documentsPath stringByAppendingPathComponent:@"myFile.xml"]; //Add the file name
NSURL *localURL = [NSURL fileURLWithPath:filePath];
// Now, append the local filename to the ubiquityURL
ubiquityURL = [ubiquityURL URLByAppendingPathComponent:localURL.lastPathComponent];
// And finish up the 'store' action
NSError *error;
if (![[NSFileManager defaultManager] setUbiquitous:YES itemAtURL:localURL destinationURL:ubiquityURL error:&error]) {
NSLog(@"Error occurred: %@", error);
}
}
else {
NSLog(@"Could not retrieve a ubiquityURL");
}
}];
}
- (void)rootDirectoryForICloud:(void (^)(NSURL *))completionHandler {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSURL *rootDirectory = [[[NSFileManager defaultManager] URLForUbiquityContainerIdentifier:nil]URLByAppendingPathComponent:@"Documents"];
if (rootDirectory) {
if (![[NSFileManager defaultManager] fileExistsAtPath:rootDirectory.path isDirectory:nil]) {
NSLog(@"Create directory");
[[NSFileManager defaultManager] createDirectoryAtURL:rootDirectory withIntermediateDirectories:YES attributes:nil error:nil];
}
}
dispatch_async(dispatch_get_main_queue(), ^{
completionHandler(rootDirectory);
});
});
}
- (NSURL *)localPathForResource:(NSString *)resource ofType:(NSString *)type {
NSString *documentsDirectory = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)[0];
NSString *resourcePath = [[documentsDirectory stringByAppendingPathComponent:resource] stringByAppendingPathExtension:type];
return [NSURL fileURLWithPath:resourcePath];
}
我该如何从iCloud Drive下载文件？
提前感谢。