CloudKit：获取具有特定记录类型的所有记录？ [英] CloudKit: Fetch all records with a certain record type?

问题描述

我目前在我的应用程序中设置了 CloudKit ，以便我可以使用下面的以下代码来添加新记录：

I have currently got CloudKit set up in my app so that I am adding a new record using the help of the following code below,

CKRecordID *recordID = [[CKRecordID alloc] initWithRecordName:@"stringArray"];
CKRecord *record = [[CKRecord alloc] initWithRecordType:@"Strings" recordID:recordID];
[record setObject:[NSArray arrayWithObjects:@"one", @"two", @"three", @"four", nil] forKey:@"stringArray"];
[_privateDatabase saveRecord:record completionHandler:nil];

但是，现在我希望能够获取所有相同记录类型的记录， 字符串，并返回那些编译为NSArray的字符串。我将如何去做？目前，我所能想到的就是如何使用recordID单独获取每条记录，这很麻烦，必须有一种更简单的方法。

However, now I would like to be able to fetch ALL records that are of the same record type, "Strings," and return those compiled into an NSArray. How would I go about doing that? Currently, all I have figured out is how to fetch each record individually, using a recordID, which is a hassle, there must be an easier way.

[_privateDatabase fetchRecordWithID:recordID completionHandler:^(CKRecord *record, NSError *error) {
   if (error) {
      // Error handling for failed fetch from private database
   }
   else {
      NSLog(@"ICLOUD TEST: %@", [record objectForKey:@"stringArray"]);            
  }
}];

推荐答案

Aaaand，我明白了。使用下面的代码，我能够创建一个查询来在数据库上运行，然后在完成的块中返回一个NSArray，并循环遍历它，并在NSLog中返回已保存键的值。

Aaaand, I've got it. Using the code below, I was able to create a query to run on the database, to then return an NSArray in the completion block, which I looped through, and returned the value for the saved key in an NSLog.

NSPredicate *predicate = [NSPredicate predicateWithValue:YES];
CKQuery *query = [[CKQuery alloc] initWithRecordType:@"Strings" predicate:predicate];

[_privateDatabase performQuery:query inZoneWithID:nil completionHandler:^(NSArray *results, NSError *error) {
    for (CKRecord *record in results) {
        NSLog(@"Contents: %@", [record objectForKey:@"stringArray"]);
    }
}];

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