我这样在后台调用 setValue():
func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
let semaphore: DispatchSemaphore = DispatchSemaphore(value: 0)
let ref = FIRDatabase.database().reference().child("data")
let data: NSDictionary = [
"test" : "test"
]
ref.setValue(data, withCompletionBlock:{
(error, reference) in
if error != nil {
print(error!)
} else {
print("success")
semaphore.signal()
}
})
_ = semaphore.wait(timeout: .distantFuture)
completionHandler(.newData)
}
但从未调用完成 block 。后台不能上传数据吗?
Apple 允许在后台调用少数功能
关于ios - 如何在后台为 Firebase 实时数据库设置值?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41566373/
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