如何用CKModifyRecordsOperation.perRecordProgressBlock更新进度
这与MRProgress的最新线程更新进度有关 。 由于之前的线程，我将我的cloudkit查询从便捷API转换为CKOperations（谢谢Edwin！）。 所以在使用CKModifyRecordsOperation保存logging时，我可以通过loginperRecordProgressBlock来查看logging的进度，这非常棒。 但是，我试图把这个进度发回到viewcontroller，我不知道如何做到这一点。 我为我的所有CloudKit方法（CKManager）创build了一个类。 我遇到的另一个问题是，我不确定何时在VC中更新进度指示器（使用MRProgress框架）。 在CKManager的保存操作调用之前，期间或之后，我是否要调用它？ 是否应该recursion调用，直到进度== 1.0？ 这是我迄今的代码…除了更新/animation进度指示器（它出现并显示0％，然后在保存操作完成时消失）之外，每个工作都正常。 此外，我在我的CKManager类中使用属性（双重进展），我知道这是不正确的，但我不知道该怎么办。 我不觉得我已经在我的CKManager类声明/定义的callback方法是正确的。 任何指导表示赞赏！
CKManager.h
@property (nonatomic, readonly) double progress; - (void)recordProgressWithCompletionHandler:(void (^)(double progress))completionHandler; CKManager.m
@property (nonatomic, readwrite) double progress; - (void)recordProgressWithCompletionHandler:(void (^)(double))completionHandler { completionHandler(self.progress); } - (void)saveRecord:(NSArray *)records withCompletionHandler:(void (^)(NSArray *, NSError *))completionHandler { NSLog(@"INFO: Entered saveRecord..."); CKModifyRecordsOperation *saveOperation = [[CKModifyRecordsOperation alloc] initWithRecordsToSave:records recordIDsToDelete:nil]; saveOperation.perRecordProgressBlock = ^(CKRecord *record, double progress) { if (progress <= 1) { NSLog(@"Save progress is: %f", progress); self.progress = progress; } }; saveOperation.perRecordCompletionBlock = ^(CKRecord *record, NSError *error) { NSLog(@"Save operation completed!"); completionHandler(@[record], error); }; [self.publicDatabase addOperation:saveOperation]; }
Viewcontroller.m – 这是从摄像头拍照并调用CKManager类准备logging并保存到CK以及显示MRProgress指示器的方法…
if (self.imageDataAddedFromCamera) { self.hud = [MRProgressOverlayView showOverlayAddedTo:self.myCollectionView animated:YES]; self.hud.mode = MRProgressOverlayViewModeDeterminateCircular; self.hud.titleLabelText = UPLOADING_MSG; // prepare the CKRecord and save it [self.ckManager saveRecord:@[[self.ckManager createCKRecordForImage:self.imageDataAddedFromCamera]] withCompletionHandler:^(NSArray *records, NSError *error) { if (!error && records) { NSLog(@"INFO: Size of records array returned: %lu", (unsigned long)[records count]); CKRecord *record = [records lastObject]; self.imageDataAddedFromCamera.recordID = record.recordID.recordName; NSLog(@"INFO: Record saved successfully for recordID: %@", self.imageDataAddedFromCamera.recordID); [self.hud dismiss:YES]; [self.hud removeFromSuperview]; [self.imageLoadManager addCIDForNewUserImage:self.imageDataAddedFromCamera]; // update the model with the new image // update number of items since array set has increased from new photo taken self.numberOfItemsInSection = [self.imageLoadManager.imageDataArray count]; [self updateUI]; } else { NSLog(@"Error trying to save the record!"); NSLog(@"ERROR: Error saving record to cloud...%@", error.localizedDescription); [self.hud dismiss:YES]; [self.hud removeFromSuperview]; [self alertWithTitle:YIKES_TITLE andMessage:ERROR_SAVING_PHOTO_MSG]; } }]; // where does this call belong? [self.ckManager recordProgressWithCompletionHandler:^(double progress) { dispatch_async(dispatch_get_main_queue(), ^{ NSLog(@"Updating hud display..."); [self.hud setProgress:progress animated:YES]; }); }];
您应该像这样在saveRecord调用中包含进度处理程序：
- (void)saveRecord:(NSArray *)records withCompletionHandler:(void (^)(NSArray *, NSError *))completionHandler recordProgressHandler:(void (^)(double))progressHandler { NSLog(@"INFO: Entered saveRecord..."); CKModifyRecordsOperation *saveOperation = [[CKModifyRecordsOperation alloc] initWithRecordsToSave:records recordIDsToDelete:nil]; saveOperation.perRecordProgressBlock = ^(CKRecord *record, double progress) { if (progress <= 1) { NSLog(@"Save progress is: %f", progress); progressHandler(progress) } }; saveOperation.perRecordCompletionBlock = ^(CKRecord *record, NSError *error) { NSLog(@"Save operation completed!"); completionHandler(@[record], error); }; [self.publicDatabase addOperation:saveOperation]; }
那么你可以调用这样的保存logging：
[self.ckManager saveRecord:@[[self.ckManager createCKRecordForImage:self.imageDataAddedFromCamera]] withCompletionHandler:^(NSArray *records, NSError *error) { if (!error && records) { NSLog(@"INFO: Size of records array returned: %lu", (unsigned long)[records count]); CKRecord *record = [records lastObject]; self.imageDataAddedFromCamera.recordID = record.recordID.recordName; NSLog(@"INFO: Record saved successfully for recordID: %@", self.imageDataAddedFromCamera.recordID); [self.hud dismiss:YES]; [self.hud removeFromSuperview]; [self.imageLoadManager addCIDForNewUserImage:self.imageDataAddedFromCamera]; // update the model with the new image // update number of items since array set has increased from new photo taken self.numberOfItemsInSection = [self.imageLoadManager.imageDataArray count]; [self updateUI]; } else { NSLog(@"Error trying to save the record!"); NSLog(@"ERROR: Error saving record to cloud...%@", error.localizedDescription); [self.hud dismiss:YES]; [self.hud removeFromSuperview]; [self alertWithTitle:YIKES_TITLE andMessage:ERROR_SAVING_PHOTO_MSG]; } }, recordProgressHandler:^(double progress) { dispatch_async(dispatch_get_main_queue(), ^{ NSLog(@"Updating hud display..."); [self.hud setProgress:progress animated:YES]; }); }];
所以更新进度的代码是你的saveRecord调用的一部分。 上面的代码没有经过我的testing。 所以我希望我没有错字