【Unity×iOS】ネイティブプラグインでSafari・Twitterを開く方法

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

extern "C" {

// Safariを開く
void OpenSafari(const char* url) {
    NSString *nsUrl = [NSString stringWithUTF8String:url];
    NSURL *nsURL = [NSURL URLWithString:nsUrl];
    if ([[UIApplication sharedApplication] canOpenURL:nsURL]) {
        [[UIApplication sharedApplication] openURL:nsURL options:@{} completionHandler:nil];
    }
}

// Twitterアプリを開く（フォールバックでSafari）
void OpenTwitter(const char* username) {
    NSString *twitterURL = [NSString stringWithFormat:@"twitter://user?screen_name=%@", [NSString stringWithUTF8String:username]];
    NSString *safariURL = [NSString stringWithFormat:@"https://twitter.com/%@", [NSString stringWithUTF8String:username]];

    NSURL *appURL = [NSURL URLWithString:twitterURL];
    NSURL *webURL = [NSURL URLWithString:safariURL];

    if ([[UIApplication sharedApplication] canOpenURL:appURL]) {
        [[UIApplication sharedApplication] openURL:appURL options:@{} completionHandler:nil];
    } else {
        [[UIApplication sharedApplication] openURL:webURL options:@{} completionHandler:nil];
    }
}
}

using System.Runtime.InteropServices;
using UnityEngine;

public class OpenURLPlugin : MonoBehaviour
{
#if UNITY_IOS && !UNITY_EDITOR
    [DllImport("__Internal")]
    private static extern void OpenSafari(string url);

    [DllImport("__Internal")]
    private static extern void OpenTwitter(string username);
#endif

    public static void OpenInSafari(string url)
    {
#if UNITY_IOS && !UNITY_EDITOR
        OpenSafari(url);
#else
        Application.OpenURL(url); // 他のプラットフォームは普通に開く
#endif
    }

    public static void OpenTwitterProfile(string username)
    {
#if UNITY_IOS && !UNITY_EDITOR
        OpenTwitter(username);
#else
        Application.OpenURL($"https://twitter.com/{username}");
#endif
    }
}