如果RequestRateLimited返回RequestRateLimited错误，是否应将相同的queryOperation添加到publicDatabase，还是应该根据游标收到新的queryOperation？如果发生dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), {
// ..other things
let qo = CKQueryOperation(query: query)
let qcb: (CKQueryCursor!, NSError!) -> () = {cursor, error in
if error == nil {
//.. some code
} else {
if error.code == CKErrorCode.RequestRateLimited.rawValue {
let retryAfter = error.userInfo![CKErrorRetryAfterKey] as! NSNumber
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, Int64(retryAfter.doubleValue * Double(NSEC_PER_SEC))), dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), {
publicDatabase.addOperation(qo) // <- HERE is it ok? I get an error
})
} else {
// .. some other code
}
}
}
qo.queryCompletionBlock = qcb
publicDatabase.addOperation(qo)
// .. other things ..
})
错误，客户端是否会收到游标？
@farktronix：
我实施得好，因为我收到错误（在模拟器中，在互联网条件差的情况下）
- [NSOperationQueue addOperation：]：操作已完成且无法入队
roo> web gwt setup
Command 'web gwt setup' not found (for assistance press CTRL+SPACE or type "hint" then hit ENTER)
Located add-on that may offer this command
1 found, sorted by rank; T = trusted developer; R = Roo 1.3 compatible
ID T R DESCRIPTION -------------------------------------------------------------
01 Y Y 1.2.5.RELEASE Support for UI scaffolding using Google Web Toolkit.
--------------------------------------------------------------------------------
[HINT] use 'addon info id --searchResultId ..' to see details about a search result
[HINT] use 'addon install id --searchResultId ..' to install a specific search result, or
[HINT] use 'addon install bundle --bundleSymbolicName TAB' to install a specific add-on version
roo> addon install id --searchResultId 01
roo> Target resource(s):
-------------------
Spring Roo - Addon - Google Web Toolkit (1.2.5.RELEASE)
Deploying...
done.
roo>
roo> web gwt setup
Command 'web gwt setup' not found (for assistance press CTRL+SPACE or type "hint" then hit ENTER)
答案 0 :(得分：1)
如果收到CKErrorRequestRateLimited错误，则您不应该收到新的查询光标。
如果收到速率限制错误，您可以在CKErrorRetryAfterKey键下的userInfo字典中指定的时间后再次重试相同的操作。