iOS弹窗UIAlertAction用法

UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"确认" message:@"确认删除吗？" preferredStyle:UIAlertControllerStyleAlert];
    
    UIAlertAction *action1 = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {
        //取消处理
    }];
    
    UIAlertAction *action2 = [UIAlertAction actionWithTitle:@"确认" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        //确认处理
    }];
    
    [alert addAction:action1];
    [alert addAction:action2];
    [self.navigationController presentViewController:alert animated:YES completion:nil];