Ios 如何使用CKModifyRecordsOperation.perRecordProgressBlock更新进度

这与最近的一个线程有关。由于上一个线程（感谢Edwin！），我将cloudkit查询从便利API转换为CKOperations。因此，在使用CKModifyRecordsOperation保存记录时，我可以通过登录perRecordProgressBlock来查看记录的进度，这非常好。但是，我正在尝试将此进度发送回viewcontroller，但我不知道如何执行此操作。我已经为我的所有CloudKit方法创建了一个类-CKManager。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）。我是在CKManager中的save operations调用之前、期间还是之后调用它？是否应该递归调用它，直到进度==1.0？这是我到目前为止的代码…除了更新/设置进度指示器动画（它显示并显示0%，然后在保存操作完成后消失）外，其他代码都可以正常工作。另外，我在我的CKManager类中使用了一个属性（double progress），我知道这是不正确的，但我不确定还有什么其他方法可以做到这一点。我觉得我在下面的CKManager类中声明/定义的回调方法也不正确。感谢您的指导

CKManager.h

@property (nonatomic, readonly) double progress;
- (void)recordProgressWithCompletionHandler:(void (^)(double progress))completionHandler;

CKM经理

    @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];
}

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您应该在saveRecord调用中包含进度处理程序，如下所示：

- (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];
}

        [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];
            });
        }];

因此，更新进度的代码是saveRecord调用的一部分。

---

我没有测试上面的代码。所以我希望我没有打字错误

谢谢！我回家后会试试，让你知道它是怎么工作的。埃德温-它工作得很好！您的saveRecord调用中有一个逗号，但我删除了它是否有效。非常感谢你！

        [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];
            });
        }];