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在ios8之后UIAlertView和UIActionSheet变成了用UIAlertController表示

首先在storyboard中创建一个按钮来测试

- (IBAction)Show:(id)sender {
    NSString *title = NSLocalizedString(@"标题", nil);
    NSString *message = NSLocalizedString(@"描述", nil);
    NSString *cancelButtonTitle = NSLocalizedString(@"Cancel", nil);
    NSString *otherButtonTitle = NSLocalizedString(@"OK", nil);

    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:title message:message preferredStyle:UIAlertControllerStyleAlert];

    // Create the actions.
    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:cancelButtonTitle style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
        NSLog(@"The \"Okay/Cancel\" alert's cancel action occured.");
    }];

    UIAlertAction *otherAction = [UIAlertAction actionWithTitle:otherButtonTitle style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
        NSLog(@"The \"Okay/Cancel\" alert's other action occured.");
    }];

    // Add the actions.
    [alertController addAction:cancelAction];
    [alertController addAction:otherAction];

    [self presentViewController:alertController animated:YES completion:nil];
}

以上代码的效果如图

如果要加入输入框，要在Create the actions之前加上

[alertController addTextFieldWithConfigurationHandler:^(UITextField *textField) {
       [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleTextFieldTextDidChangeNotification:) name:UITextFieldTextDidChangeNotification<br/> object:textField];
       textField.secureTextEntry = YES;
       //可以设置颜色
       //textField.backgroundColor = [UIColor orangeColor];
   }];

效果如图

如果在底部弹出，代码如下

    NSString *cancelButtonTitle = NSLocalizedString(@"Cancel", nil);
    NSString *destructiveButtonTitle = NSLocalizedString(@"OK", nil);

    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:nil message:nil preferredStyle:UIAlertControllerStyleActionSheet];

    // Create the actions.
    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:cancelButtonTitle style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
        NSLog(@"The \"Okay/Cancel\" alert action sheet's cancel action occured.");
    }];

    UIAlertAction *destructiveAction = [UIAlertAction actionWithTitle:destructiveButtonTitle style:UIAlertActionStyleDestructive handler:^(UIAlertAction *action) {
        NSLog(@"The \"Okay/Cancel\" alert action sheet's destructive action occured.");
    }];

    // Add the actions.
    [alertController addAction:cancelAction];
    [alertController addAction:destructiveAction];

    [self presentViewController:alertController animated:YES completion:nil];
}

效果如图