iOS 9 的 UIAlertView 替代品？

Question

UAlertView 在 iOS 9 及更高版本中已弃用。有什么替代方案？

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

Answer 1

UIAlertController 自 iOS 8.

以来一直存在

Answer 2

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

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

Answer 3

通过 ⌘-单击显示 class/method 声明的符号，您通常会获得包括替换建议在内的详细信息。

在 UIAlertView 的情况下，您将看到

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

Answer 4

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];

并添加按钮：

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

记住：

[alertController addAction:okAction];

然后显示：

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

如果你想显示一个动作羊，你改变

"preferredStyle:UIAlertControllerStyleActionSheet"

Answer 5

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];

如果您需要多项操作，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];

Answer 6

  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];

Answer 7

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];
}

参数 aTitle 和 aVC 是可选的，但如果知道，应该使用 aVC。

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。

iOS 9 的 UIAlertView 替代品？

Alternative to UIAlertView for iOS 9?

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objective-c

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