SwiftUI：将多个图像上载到Firebase

目标：从SwiftUI应用程序上传3张图片到Firebase，每个图片都有不同的URL

问题：我只上传了1个

我尝试过的（但没有成功）。。。。 :

全功能波纹管：

static func savePostPhoto(
    
    
    //id
    userId: String,
    
    image1: Data,
    image2: Data,
    image3: Data,
    
   // imagesArray : [Data],


    metadata: StorageMetadata,
    storagePostRef: StorageReference,
    onSuccess: @escaping() -> Void,
    onError: @escaping(_ errorMessage: String) -> Void)

  {
    
    let arrayOfImages : [Data] = [image1, image2, image3]

        
    //image storage
    storagePostRef.putData(image1, metadata: metadata) { (storageMetadata, error) in
        
          if error != nil {
              onError(error!.localizedDescription)
              return
          }
        
        //image URL

        storagePostRef.downloadURL { (url, error) in
            
            let image1 = url?.absoluteString
            let image2 = url?.absoluteString
            let image3 = url?.absoluteString

   
        }
    }
    


}

---

每次调用

putData

都会在调用

putData

的位置存储一个图像

因此，如果要存储三个单独的图像，必须对三个不同的

StorageReference

对象调用

putData

。然后，要获取三个下载URL，还需要对三个

StorageReference

对象中的每一个调用

downloadURL

storagePostRef1.putData(image1, metadata: metadata) { (storageMetadata, error) in
  storagePostRef1.downloadURL { (url1, error) in
    let image1 = url?.absoluteString  storagePostRef2.putData(image2, metadata: metadata) { (storageMetadata, error) in
      storagePostRef2.downloadURL { (url2, error) in
        storagePostRef3.putData(image3, metadata: metadata) { (storageMetadata, error) in
          storagePostRef3.downloadURL { (url3, error) in

您可以创建自己的helper函数来处理对

putData

和

downloadUrl

的调用，只需一个闭包/回调，就可以稍微清理一下

storagePostRef1.putData(image1, metadata: metadata) { (storageMetadata, error) in
  storagePostRef1.downloadURL { (url1, error) in
    let image1 = url?.absoluteString  storagePostRef2.putData(image2, metadata: metadata) { (storageMetadata, error) in
      storagePostRef2.downloadURL { (url2, error) in
        storagePostRef3.putData(image3, metadata: metadata) { (storageMetadata, error) in
          storagePostRef3.downloadURL { (url3, error) in