我刚刚将
xcode8更新为
Swift 3并收到此错误：
Value of type 'DispatchQueue' has no member 'asynchronously'
在这条线上：
DispatchQueue.main.asynchronously(execute:
这是整个代码段：
DispatchQueue.main.asynchronously(execute: {
//Display alert message with confirmation
let myAlert = UIAlertController(title: "Alert",message:messageToDisplay,preferredStyle: UIAlertControllerStyle.Alert);
let okAction = UIAlertAction(title:"OK",style:UIAlertActionStyle.Default){
action in self.dismissViewControllerAnimated(true,completion:nil);
}
myAlert.addAction(okAction)
self.presentViewController(myAlert,animated:true,completion:nil);
});
}
}
catch let error as NSError {
print(error.localizedDescription)
}
}
task.resume()
}
}
在Swift 3和iOS 10的生产版本中,没有异步方法.这只是异步：
DispatchQueue.main.async {
//Display alert message with confirmation
let alert = UIAlertController(title: "Alert",message: messageToDisplay,preferredStyle: .alert)
let okAction = UIAlertAction(title: "OK",style: .default) { action in
self.dismiss(animated: true)
}
alert.addAction(okAction)
self.present(alert,animated: true)
}