我正在尝试在我的IBAction发生后执行一个segue。这是我的代码,正如你所看到的,当我按下按钮时,我用alamofire发出了一个get请求。问题是该请求(据我了解(是一个异步方法,因此如果 getPlayer 方法没有完成它应该做的事情,segue 将展开并执行 eve。我能修复它的唯一方法是将 perfomrsegue 方法放在 if 语句中,我在其中检查 person.name 的值,但我必须按两次按钮,我只是不知道如何解决这个问题!
@IBAction func getPlayerPressed(_ sender: UIButton) {
userDefaults.set(tagTextField.text!, forKey: "userTag")
let userTag = userDefaults.string(forKey: "userTag")
getPlayerData(with: userTag!)
performSegue(withIdentifier: "goToPlayerProfile", sender: self)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let destionationVC = segue.destination as! PlayerProfileViewController
destionationVC.playerName = player.name
print(destionationVC.playerName)
print("prepared for segue")
}
func getPlayerData (with tag: String) {
let finalURL = baseURL + tag
Alamofire.request(finalURL, headers: headers).responseJSON { (response) in
if response.result.isSuccess {
print("Got player data!")
let playerJSON = JSON(response.result.value!)
self.player.name = playerJSON["name"].stringValue
print(self.player.name)
} else {
print("Error: (response.result.error!)")
}
}
在异步 alamofire 请求完成后执行 segue。
func getPlayerData (with tag: String) {
let finalURL = baseURL + tag
Alamofire.request(finalURL, headers: headers).responseJSON { (response) in
if response.result.isSuccess {
print("Got player data!")
let playerJSON = JSON(response.result.value!)
self.player.name = playerJSON["name"].stringValue
print(self.player.name)
DispatchQueue.main.async {
self.performSegue(withIdentifier: "goToPlayerProfile", sender: self)
}
} else {
print("Error: (response.result.error!)")
}
}
}