January 2020
Intermediate to advanced
356 pages
6h 4m
Chinese
Content preview from Swift游戏开发经典实例
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存储数据
｜
169
let record = CKRecord(recordType: NoteRecordType)
record.setObject(text as CKRecordValue,
forKey: NoteRecordKey.contents.rawValue)
self.database.save(record, completionHandler: { (record, error) in
if let record = record {
print("Successfully saved record \(record.recordID)")
// Indicate to the user that it's saved
} else if let error = error {
print("Error saving record: \(error)")
}
})
}
讨论
创建新纪录、修改已有记录都是一样的方法，即修改它的字段，然后
save
。
在开发过程中，当你保存一个
CKRecord
时，类型和字段是自动创建的。你也可以
通过
CloudKit Dashboard
手动创建类型和字段。一旦
App
发布，你的数据库被迁
移到
CloudKit
的生产环境，这时，你只能通过
Dashboard
手动定义类型和字段。
保存完成时调用的闭包可以在任何
operation queue
中运行，因此如果你想刷新用户
UI
，你需要确保在主队列中运行。更多内容参考 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.