IOS 开发 弹框 UIAlertView 与UIAlertController

//View 里面的一个按钮
- (IBAction)showAlert:(id)sender {
    //ios8 之前
    UIAlertView * alert=[[UIAlertView alloc]
                         initWithTitle:@"你好，波多老师"
                         message:@"听说您🈶有新戏要上映了"
                         delegate:nil
                         cancelButtonTitle:@"我来贡献票房来了"
                         otherButtonTitles:nil, nil
                         ];
    
    [alert show];
    
    //IOS 8 之后
    UIAlertController * newAlert=[UIAlertController
                                  alertControllerWithTitle: @"你好，苍老师"
                                  message:@"听说您也🈶有新戏要上映了"
                                  preferredStyle:UIAlertControllerStyleAlert
                                  ];
    
    UIAlertAction * newAlertAction=[UIAlertAction
                                    actionWithTitle:@"我来贡献票房来了"
                                    style:UIAlertActionStyleDefault
                                    handler:nil
                                    ];
    //弹框按钮
    [newAlert addAction:newAlertAction];
    
    //初始化弹框
    [self presentViewController:newAlert animated:true completion:nil];
}