【Unity×iOS】ネイティブでURLを開く方法｜Safari・Twitter対応の.mmプラグイン付き解説【コピペOK】

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

extern "C" {

// SafariでURL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アプリでプロフィールを開く（なければSafariで開く）
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 UnityEngine;

public class URLClick : MonoBehaviour
{
    public void URL_Click(string URL)
    {
        OpenURLPlugin.OpenInSafari(URL);
    }

    public void Twitter(string TwitterUsername)
    {
        OpenURLPlugin.OpenTwitterProfile(TwitterUsername);
    }
}