現在、アプリの 1 つに次のコード行があります。シンプルUIAlertViewです。ただし、iOS 8 の時点で、これは非推奨になりました。
let alertView = UIAlertView(title: "Oops!", message: "This feature isn't available right now", delegate: self, cancelButtonTitle: "OK")
これを iOS 8 以降で動作するように更新するにはどうすればよいですか? UIAlertCotrollerよくわかりませんが、何かを に変更する必要があると思います。
Objective-C でこれを行う方法を知りたい場合:
//Step 1: Create a UIAlertController
UIAlertController *myAlertController = [UIAlertController alertControllerWithTitle:@"MyTitle"
message: @"MyMessage"
preferredStyle:UIAlertControllerStyleAlert ];
//Step 2: Create a UIAlertAction that can be added to the alert
UIAlertAction* ok = [UIAlertAction
actionWithTitle:@"OK"
style:UIAlertActionStyleDefault
handler:^(UIAlertAction * action)
{
//Do some thing here, eg dismiss the alertwindow
[myAlertController dismissViewControllerAnimated:YES completion:nil];
}];
//Step 3: Add the UIAlertAction ok that we just created to our AlertController
[myAlertController addAction: ok];
//Step 4: Present the alert to the user
[self presentViewController:myAlertController animated:YES completion:nil];
これにより、次のようなアラートがポップアップ表示されます。
let alertView = UIAlertView(title: "Oops!", message: "This feature isn't available right now", delegate: self, cancelButtonTitle: "OK")
になる
let alertController = UIAlertController(title: "Oops!", message: "This feature isn't available right now", preferredStyle: .Alert)
let OKAction = UIAlertAction(title: "OK", style: .Default) { (action) in }
alertController.addAction(OKAction)
self.presentViewController(alertController, animated: true) { }
スウィフト 2.0:
AlertController を使用します。
アクションシートの例:
let mediaActionSheet: UIAlertController = UIAlertController(title: "Media Action Sheet", message: "Choose an option!", preferredStyle: .ActionSheet)
//Create and add the Cancel action
let cancelAction: UIAlertAction = UIAlertAction(title: "Cancel", style: .Cancel) { action -> Void in
//Just dismiss the action sheet
}
mediaActionSheet.addAction(cancelAction)
//Create and add first option action
let takePictureAction: UIAlertAction = UIAlertAction(title: "Take Picture", style: .Default) { action -> Void in
//Code for launching the camera goes here
}
mediaActionSheet.addAction(takePictureAction)
//Create and add a second option action
let choosePictureAction: UIAlertAction = UIAlertAction(title: "Choose From Gallery", style: .Default) { action -> Void in
//Code for picking from gallery goes here
}
mediaActionSheet.addAction(choosePictureAction)
//Present the AlertController
self.presentViewController(mediaActionSheet, animated: true, completion: nil)
アラートの例:
1)
let simpleAlert = UIAlertController(title: "Simple Alert", message: "It is just awesome", preferredStyle: UIAlertControllerStyle.Alert);
//show it
showViewController(simpleAlert, sender: self);
2) TextField を含むアラート。
let inputTextFieldAlert:UIAlertController = UIAlertController(title: " Input TextField Alert ", message: " Enter on the below TextField ", preferredStyle: UIAlertControllerStyle.Alert);
//default input textField (no configuration...)
inputTextFieldAlert.addTextFieldWithConfigurationHandler(nil);
//no event handler (just close dialog box)
inputTextFieldAlert.addAction(UIAlertAction(title: "No", style: UIAlertActionStyle.Cancel, handler: nil));
//event handler with closure
inputTextFieldAlert.addAction(UIAlertAction(title: "Yes", style: UIAlertActionStyle.Default, handler: {(action:UIAlertAction) in
let fields = inputTextFieldAlert.textFields!;
print("Output: "+fields[0].text!);
}));
presentViewController(inputTextFieldAlert, animated: true, completion: nil);
3)
var alert = UIAlertController(title: "TextField Alert", message: "Enter on the below TextField", preferredStyle: UIAlertControllerStyle.Alert);
//configured input textField
var field:UITextField?;
alert.addTextFieldWithConfigurationHandler({(input:UITextField)in
input.placeholder="Empty Dtaa ;-)";
input.clearButtonMode=UITextFieldViewMode.WhileEditing;
field=input;
});
//YES Handler
func yesHandler(actionTarget: UIAlertAction){
print(field!.text!);
}
//event handler with predefined function
alert.addAction(UIAlertAction(title: "Yes", style: UIAlertActionStyle.Default, handler: yesHandler));
presentViewController(alert, animated: true, completion: nil);
これは、古い iOS SDK との下位互換性を確保し、新しい SDK を使用するときに新しい API を使用するための方法だと思います。また、非推奨のクラスを使用するコードでの非推奨の警告もありません。
if ([UIAlertController class]) {
// Use new API to create alert controller, add action button and display it
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"CityBoard" message:error.errorDescription preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction* ok = [UIAlertAction actionWithTitle: @"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) {
[alertController dismissViewControllerAnimated:YES completion:nil];
}];
[alertController addAction: ok];
[self presentViewController:alertController animated:YES completion:nil];
} else {
// We are running on old SDK as the new class is not available
// Hide the compiler errors about deprecation and use the class available on older SDK
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"CityBoard"
message:error.errorDescription
delegate:self
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
#pragma clang diagnostic pop
次のコードを Alert ビューに使用できます。
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Title" message:@"Message" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction* ok = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:nil];
[alertController addAction:ok];
[self presentViewController:alertController animated:YES completion:nil];
複数のボタンの場合は、次を使用できます。
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Title" message:@"Message" preferredStyle:UIAlertControllerStyleAlert];
[alertController addAction:[UIAlertAction actionWithTitle:@"Button 1" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
[self loadGooglrDrive];
}]];
[alertController addAction:[UIAlertAction actionWithTitle:@"Button 2" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
[self loadDropBox];
}]];
[alertController addAction:[UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
[self closeAlertview];
}]];
dispatch_async(dispatch_get_main_queue(), ^ {
[self presentViewController:alertController animated:YES completion:nil];
});
-(void)closeAlertview
{
[self dismissViewControllerAnimated:YES completion:nil];
}