0.修改dataClass

因為我們要變成多張了，所以我們要把原本的String，改成List，新增以下

val photoUriList: List<String>? = null
1. 修改Intent
我們原本是單選，現在我們要把它新增成為可以選擇多樣的方式，直接在AddInvitationFragment裡面的 checkPermission()，修改Intent
val intent =   Intent(
                Intent.ACTION_PICK,
                MediaStore.Images.Media.EXTERNAL_CONTENT_URI)
            intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE,true)
            resultLauncher.launch(intent)
2.修改resultLauncher
再過來我們也要去我們的resultLauncher修改成拿到多張照片，原本拿到的方式是data.data(拿到一張)，現在我們現在透過data.clipData就可以拿到多張照片啦!
private val resultLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()){ uri ->
        if (uri.resultCode == Activity.RESULT_OK){
            val selectedUri = uri.data?.clipData
            if (selectedUri != null){
                val list = mutableListOf<Uri>()
                val account = selectedUri.itemCount
				//在這邊把它加入list
                for (i in 0 until account){
                    val model = selectedUri.getItemAt(i).uri
                    list.add(model)
				//並傳入viewModel
                matchingViewModel.saveImageToFireStorage(requireActivity(),this,list)
3.修改saveImageToFireStorage()
看了一下Firebase的文檔，好像沒有一次上傳多張照片的方式，所以這邊就用for loop 分次上傳，且因為Firebase會自動異步，所以我們在上傳成功的時候，判斷是否全部都傳完了，傳完了就把資料丟進Fragment
//我們要把傳入的單筆url改成list
fun saveImageToFireStorage(activity: Activity, fragment: AddInvitationFragment, list: List<Uri>) {
       val newList = mutableListOf<Uri>()
       for (i in list.indices){
           val sdf: StorageReference = FirebaseStorage.getInstance().reference.child(
               Constant.PET_IMAGE + "_" + System.currentTimeMillis() + "_" + Constant.getFileExtension(
                   activity,
                   list[i]
           sdf.putFile(list[i])
               .addOnSuccessListener { it ->
                   it.metadata?.reference?.downloadUrl
                       ?.addOnSuccessListener { uri ->
                       newList.add(uri)
                           Timber.d("測試 uri: $uri")
                           if (i == list.size-1){
                               Timber.d("得到的所有可下載 uri $newList  listSize:${newList.size}")
                                fragment.saveImageSuccessful(newList)
                       ?.addOnFailureListener {
                           fragment.saveImageFail(it.toString())
               .addOnFailureListener {
                   fragment.saveImageFail(it.toString())
4.修改saveImageSuccess()
在最上面新增
private var selectedUriList: List<String> = listOf()
因為我們的Firestore不接受Url的格式，所以我們要把它改成String在傳上去!
fun saveImageSuccessful(uriList: List<Uri>){
        showSnackBar(resources.getString(R.string.update_pet_image_successful),false)
        val list = mutableListOf<String>()
        for (element in uriList){
            val model = element.toString()
            list.add(model)
       selectedUriList = list
這樣就完成囉!!  接下來明天將會把它顯示出來!