替代 iOS 9 的 UIAlertView？

Alternative to UIAlertView for iOS 9?

提问by user3138007

UAlertViewis deprecated in iOS 9 and later. What would be an alternative?

UAlertView在 iOS 9 及更高版本中已弃用。什么是替代方案？

UIAlertView *new = [[UIAlertView alloc] initWithTitle:@"Success" message:@"Your InApp Purchases were successfully restored" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[new show];

回答by Nithinbemitk

You can use this code to replace an alert view:

您可以使用此代码替换警报视图：

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Title" message:@"Message" preferredStyle:UIAlertControllerStyleAlert];           
[alertController addAction:[UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:nil]];
[self presentViewController:alertController animated:YES completion:nil];

If you need multiple actions you can use:

如果您需要多个操作，您可以使用：

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Title" message:@"Message" preferredStyle:UIAlertControllerStyleAlert];
[alertController addAction:[UIAlertAction actionWithTitle:@"Button 1" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
    // action 1
}]];
[alertController addAction:[UIAlertAction actionWithTitle:@"Button 2" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
    // action 2
}]];
[alertController addAction:[UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
    [self dismissViewControllerAnimated:YES completion:nil];
}]];           
[self presentViewController:alertController animated:YES completion:nil];

回答by vadian

You get often detailed information including the replacement suggestion by ?-clicking on the symbol which displays the class/method declaration.

通过?单击显示类/方法声明的符号，您通常可以获得包括替换建议在内的详细信息。

In case of UIAlertViewyou will see

如果UIAlertView你会看到

"UIAlertView is deprecated. Use UIAlertController with a preferredStyle of UIAlertControllerStyleAlert instead"

“不推荐使用 UIAlertView。使用 UIAlertController 和首选样式 UIAlertControllerStyleAlert 代替”

回答by Mr.Javed Multani

  UIAlertController * alert=   [UIAlertController
                             alertControllerWithTitle:@"Info"
                             message:@"You are using UIAlertController"
                               preferredStyle:UIAlertControllerStyleAlert];

   UIAlertAction* ok = [UIAlertAction
                    actionWithTitle:@"OK"
                    style:UIAlertActionStyleDefault
                    handler:^(UIAlertAction * action)
                    {
                        [alert dismissViewControllerAnimated:YES completion:nil];

                    }];
  UIAlertAction* cancel = [UIAlertAction
                         actionWithTitle:@"Cancel"
                       style:UIAlertActionStyleDefault
                       handler:^(UIAlertAction * action)
                       {
                           [alert dismissViewControllerAnimated:YES completion:nil];
                        }];
 [alert addAction:ok];
 [alert addAction:cancel];

 [self presentViewController:alert animated:YES completion:nil];

回答by Rémy Blanc

I made a category for that:

我为此做了一个分类：

+ (void)alertViewWithTitle:(NSString *)aTitle message:(NSString *)aMessage viewController:(UIViewController *) aVC
{
    UIAlertController * alert = [UIAlertController
                                 alertControllerWithTitle:aTitle ? aTitle : @""
                                 message:aMessage
                                 preferredStyle:UIAlertControllerStyleAlert];

    UIViewController *topVC = aVC ? aVC : [UIApplication sharedApplication].keyWindow.rootViewController;
    [topVC presentViewController:alert animated:YES completion:nil];
}

The parameters aTitleand aVCare optional but aVCshould be used if known.

参数aTitle和aVC是可选的，但aVC如果已知则应使用。

PS: avoid the "new" as a variable name this is a reserved word, I actually don't know if it will compile though.

PS：避免将“new”作为变量名，这是一个保留字，我实际上不知道它是否会编译。

回答by AmyNguyen

I have use "UIAlertController" on iOS 8 and later. Let see:

我在 iOS 8 及更高版本上使用了“UIAlertController”。让我们看看：

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Success" message:@"Your InApp Purchases were successfully restored" preferredStyle:UIAlertControllerStyleAlert];

And add buttons:

并添加按钮：

UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action){
           //do something when click button
}];

Remember:

记住：

[alertController addAction:okAction];

Then show it:

然后显示它：

[self presentViewController:alertController animated:YES completion:nill];

If you want to show a actionsheep, you change

如果你想显示一个actionsheep，你改变

"preferredStyle:UIAlertControllerStyleActionSheet"

回答by quark

UIAlertControllerhas been around since iOS 8.

UIAlertController从 iOS 8开始就已经存在了。

回答by user3138007

UIAlertController * alert=   [UIAlertController
                                    alertControllerWithTitle:@"My Title"
                                    message:@"Enter User Credentials"
                                    preferredStyle:UIAlertControllerStyleAlert];

    [self presentViewController:alert animated:YES completion:nil];