如何让用户复制UIAlertView的描述？

// 导入需要的头文件
#import <UIKit/UIKit.h>

// 创建一个视图控制器
@interface ViewController : UIViewController

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    // 创建UIAlertView对象
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"提示" message:@"这是一条消息" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"复制", nil];
    
    // 显示UIAlertView
    [alertView show];
}

// UIAlertView按钮点击事件处理方法
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
    // 获取消息内容
    NSString *message = [alertView message];
    
    // 判断点击的按钮是否是"复制"
    if (buttonIndex == 1) {
        // 将消息内容复制到剪贴板
        UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
        [pasteboard setString:message];
        
        // 弹出提示框，告知用户复制成功
        UIAlertView *successAlert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"复制成功" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil];
        [successAlert show];
    }
}

@end