[英]How to run Asynchronous function in a Uibutton in swift
我希望getUserToken函数和userLogin函数在Firebase身份验证的下一行之前运行。 使其异步运行
@IBAction func loginButtonPressed(_ sender: UIButton) {
self.showSpinner(onView: self.view)
guard var phoneNumber = phoneTextField.getRawPhoneNumber() else { return }
phoneNumber = "+234\(phoneNumber)"
guard var userPhoneNumber = phoneTextField.getRawPhoneNumber() else { return }
userPhoneNumber = "234\(userPhoneNumber)"
guard let userName = nameTextField.text else {return}
print(phoneNumber)
getUserAcessToken()
userLogin()
//Validate Required fields are mnot empty
if nameTextField.text == userName {
//Firebase Manipulation
PhoneAuthProvider.provider().verifyPhoneNumber(phoneNumber, uiDelegate: nil) { (verificationId, error) in
if error == nil {
print(verificationId!)
//UserDefaults Database manipulation for Verification ID
guard let verifyid = verificationId else {return}
self.defaults.set(verifyid, forKey: "verificationId")
self.defaults.synchronize()
self.removeSpinner()
}else {
print("Unable to get secret verification code from Firebase", error?.localizedDescription as Any)
let alert = UIAlertController(title: "Please enter correct email and phone number", message: "\n", preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
self.present(alert, animated: true, completion: nil)
return
}
}
}
let OTPRequestVC = storyboard?.instantiateViewController(withIdentifier: "OTPRequestViewController") as! OTPRequestViewController
OTPRequestVC.userId = userId
OTPRequestVC.userEmailData = userEmail
self.present(OTPRequestVC, animated: true)
}
我希望这两个函数在firebase auth之前异步运行。
在主线程上运行耗时的函数不是一个好主意。 我的建议是。
这将确保在您进行这些api调用之前,UI不会挂起,并且用户将知道应用程序中正在发生某些事情并且该应用程序未挂起。
在不重现全部预期功能的情况下,您要遵循的模式是:
func loginButtonPressed(_ sender: UIButton) {
// Any immediate changes to the UI here
// ...
// Start time consuming task in background
DispatchQueue.global(qos: .userInitiated).async {
getUserAccessToken()
userLogin()
// Make your Firebase call
PhoneAuthProvider.provider().verifyPhoneNumber(phoneNumber, uiDelegate: nil) { (verificationId, error) in
// Any response validation here
// ...
DispatchQueue.main.async {
// Any UI updates here
}
}
}
}
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