更新时间:2022-05-06 22:05:31
很显然,它是异步执行的问题.将 *函数与Closure * 结合使用,而不要使用具有返回值的函数.
Clearly its issue of asynchronous execution. Use * function with Closure* Instead of function with returning value.
请参考以下代码
var docRefF : DocumentReference!
func getTime(_ then:(_ first:Int, _ second:Int)->()){
var FHour = Int()
var FMinute = Int()
docRefF = Firestore.firestore().document("sampleTime/worktime")
dataListener = docRefF.addSnapshotListener { (docSnapshot, error) in
guard let docSnapshot = docSnapshot, docSnapshot.exists else { return }
let data = docSnapshot.data()
let Hour:Int = data["Hour"]! as! Int
let Minute: Int = data["Minute"]! as! Int
FHour = Hour
FMinute = Minute
//TODO:- Use other firebase related task same as your code, so that uncomment other lines same as your origional
then(FHour, FMinute) // This is closure call back line
}
}
//Calling your function
getTime { (first, second) in
print(first,second)
}