自从在 Xcode 8（Beta 1）和 Swift 3 上升级以来，我在这一行出现了一个错误：
account.requestAccessToAccounts(with: accountType, options: nil, completion: {(success: Bool, error: NSError!) -> Void in
它说：
无法将类型“（Bool，NSError！）-> Void”的值转换为预期的参数类型“ACAccountStoreRequestAccessCompletionHandler！”
在该行之前，我定义了“account”和“accountType”：
let account = ACAccountStore()
let accountType = account.accountType(
withAccountTypeIdentifier: ACAccountTypeIdentifierTwitter)
这是我的（使用 Xcode 7 和 Swift 2 工作）代码：
func getTimeline() {
//https://api.twitter.com/1.1/statuses/user_timeline.json?screen_name=twitterapi&count=2
let account = ACAccountStore()
let accountType = account.accountType(
withAccountTypeIdentifier: ACAccountTypeIdentifierTwitter)
account.requestAccessToAccounts(with: accountType, options: nil,
completion: {(success: Bool, error: NSError!) -> Void in
if success {
let arrayOfAccounts =
account.accounts(with: accountType)
if arrayOfAccounts.count > 0 {
let twitterAccount = arrayOfAccounts.last as! ACAccount
let requestURL = URL(string:
"https://api.twitter.com/1.1/statuses/user_timeline.json")
let parameters = ["screen_name": self.userName!,
"count" : "20"]
let postRequest = SLRequest(forServiceType:
SLServiceTypeTwitter,
requestMethod: SLRequestMethod.GET,
url: requestURL,
parameters: parameters)
postRequest.account = twitterAccount
postRequest.perform(
handler: {(responseData: Data!,
urlResponse: HTTPURLResponse!,
error: NSError!) -> Void in
if error != nil {
Crashlytics.sharedInstance().recordError(error)
}
do {
self.dataSource = try JSONSerialization.jsonObject(with: responseData, options: JSONSerialization.ReadingOptions.mutableLeaves) as! [AnyObject]
if self.dataSource.count != 0 {
DispatchQueue.main.async {
self.tableView.reloadData()
}
}
} catch {
print("catching")
}
})
}
} else {
print("Failed to access account")
}
})
}