我使用 raywenderlich https://www.raywenderlich.com/6015/beginning-icloud-in-ios-5-tutorial-part-1 将 iCloud 集成到 iOS 应用程序中
但我无法将 iCloud 中的所有文件显示到我们的 iOS 应用程序，还需要特定类型的文件，如 pdf、doc 和 docx
谁能推荐我。
【问题讨论】：
标签： ios icloud icloud-api icloud-drive
按照以下步骤将 iCloud 集成到 iOS 应用中并检索文件。 1. 从您的开发者帐户启用 iCloud。 2. 在开发者账户创建 iCloud 容器授权。 3. 然后只需在您想要集成 iCloud 集成的地方使用以下代码。
首先导入#import 并添加iCloudDelegate委托，然后设置委托：
// Setup iCloud
[[iCloud sharedCloud] setDelegate:self];
[[iCloud sharedCloud] setVerboseLogging:YES];
[[iCloud sharedCloud] setupiCloudDocumentSyncWithUbiquityContainer:nil];
[self showiCloudFiles];
然后在下面实现方法showiCloudFiles
-(void) showiCloudFiles{
BOOL cloudAvailable = [[iCloud sharedCloud] checkCloudAvailability];
if (cloudAvailable && [[NSUserDefaults standardUserDefaults] boolForKey:@"userCloudPref"] == YES) {
UIDocumentPickerViewController *documentPicker = [[UIDocumentPickerViewController alloc] initWithDocumentTypes:@[@"public.content"]
inMode:UIDocumentPickerModeImport];
documentPicker.delegate = self;
documentPicker.modalPresentationStyle = UIModalPresentationFormSheet;
[self presentViewController:documentPicker animated:YES completion:nil];
}
else if ([[NSUserDefaults standardUserDefaults] boolForKey:@"userCloudPref"] == NO) {
UIAlertController * alert = SIMPLE_ALERT_VIEW(@"iCloud Disabled", @"You have disabled iCloud for this app. Would you like to turn it on again?");
UIAlertAction* cancelButton = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action){}];[alert addAction:cancelButton];
UIAlertAction* deleteButton = [UIAlertAction actionWithTitle:@"Turn On iCloud"
style:UIAlertActionStyleDefault
handler:^(UIAlertAction * action){
[[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"userCloudPref"];
[[NSUserDefaults standardUserDefaults] synchronize];
BOOL cloudAvailable = [[iCloud sharedCloud] checkCloudAvailability];
if (cloudAvailable && [[NSUserDefaults standardUserDefaults] boolForKey:@"userCloudPref"] == YES) {
UIDocumentPickerViewController *documentPicker = [[UIDocumentPickerViewController alloc] initWithDocumentTypes:@[@"public.content"]
inMode:UIDocumentPickerModeImport];
documentPicker.delegate = self;
documentPicker.modalPresentationStyle = UIModalPresentationFormSheet;
[self presentViewController:documentPicker animated:YES completion:nil];
}
}];
[alert addAction:deleteButton];
[self presentViewController:alert animated:YES completion:nil];
} else {
UIAlertController * alert = SIMPLE_ALERT_VIEW(@"Setup iCloud", @"iCloud is not available. Sign into an iCloud account on this device and check that this app has valid entitlements.");
UIAlertAction* cancelButton = [UIAlertAction actionWithTitle:@"Okay" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action){}];[alert addAction:cancelButton];
}];
[self presentViewController:alert animated:YES completion:nil];
}
}
之后使用 UIDocumentPickerDelegate 方法下载文件：
#pragma mark - UIDocumentPickerDelegate
-(void)documentPicker:(UIDocumentPickerViewController *)controller didPickDocumentAtURL:(NSURL *)url{
if (controller.documentPickerMode == UIDocumentPickerModeImport) {
//NSLog(@"%@",url);
[url startAccessingSecurityScopedResource];
NSFileCoordinator *coordinator = [[NSFileCoordinator alloc] init];
NSError *error;
__block NSData *fileData;
[coordinator coordinateReadingItemAtURL:url options:NSFileCoordinatorReadingForUploading error:&error byAccessor:^(NSURL *newURL) {
// File name for use in writing the file out later
NSString *fileName = [newURL lastPathComponent]; NSString *fileExtension = [newURL pathExtension]; if([fileExtension isEqualToString:@"zip"]) {if([[[newURL URLByDeletingPathExtension] pathExtension] isEqualToString:@"pages"] ||
[[[newURL URLByDeletingPathExtension] pathExtension] isEqualToString:@"numbers"] ||
[[[newURL URLByDeletingPathExtension] pathExtension] isEqualToString:@"key"] ) {
// Remove .zip if it is an iWork file
fileExtension = [[newURL URLByDeletingPathExtension] pathExtension];
fileName = [[newURL URLByDeletingPathExtension] lastPathComponent];
}
}
NSError *fileConversionError;fileData = [NSData dataWithContentsOfURL:newURL options:NSDataReadingUncached error:&fileConversionError];
// Do further code using fileData
}
}];
[url stopAccessingSecurityScopedResource];
}
}
UIDocumentPicker请访问此链接iOS-8-UIDocumentPicker
【讨论】：
按照本指南进行操作
https://www.raywenderlich.com/12779/icloud-and-uidocument-beyond-the-basics-part-1
在
处下载示例代码https://github.com/rwenderlich/PhotoKeeper
检查 iCloud 是否可用
- (void)initializeiCloudAccessWithCompletion:(void (^)(BOOL available)) completion {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
_iCloudRoot = [[NSFileManager defaultManager] URLForUbiquityContainerIdentifier:nil];
if (_iCloudRoot != nil) {
dispatch_async(dispatch_get_main_queue(), ^{
NSLog(@"iCloud available at: %@", _iCloudRoot);
completion(TRUE);
});
}
else {
dispatch_async(dispatch_get_main_queue(), ^{
NSLog(@"iCloud not available");
completion(FALSE);
});
}
});
}
查询pdf、doc、docx等苍蝇类型
- (NSMetadataQuery *)documentQuery {
NSMetadataQuery * query = [[NSMetadataQuery alloc] init];
if (query) {
// Search documents subdir only
[query setSearchScopes:[NSArray arrayWithObject:NSMetadataQueryUbiquitousDocumentsScope]];
// Add a predicate for finding the documents
NSString * filePattern = [NSString stringWithFormat:@"*.%@", PTK_EXTENSION];
[query setPredicate:[NSPredicate predicateWithFormat:@"%K LIKE %@",
NSMetadataItemFSNameKey, filePattern]];
}
return query;
}
【讨论】：