Objective c 将多个文件上载到一行parse.com

因此，我使用以下代码将多个文件上载到类的一行

for (NSString* currentString in directoryContents){

    NSLog(@"%@",currentString);
    NSString *temp2 = [temp stringByAppendingPathComponent:currentString];
    PFFile *file = [PFFile  fileWithName:currentString contentsAtPath:temp2];
    [file saveInBackground];
    PFObject *obj = [PFObject objectWithClassName:@"DreamBits"];

    if ([currentString isEqualToString:@"index.html"]) {
        [obj setObject:file forKey:@"index"];
    }
    else {
        count += 1;

        NSString *filen = [NSString stringWithFormat:@"file%i",count];
        NSLog(@"%@",filen);

        [obj setObject:file forKey:filen];
    }
    [obj saveInBackground];
}

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问题是，我会因为某种原因而感到沮丧。你知道我该怎么更正吗？

我对你的代码做了一点修改。我不运行此代码，但希望它能帮助您

PFObject *obj = [PFObject objectWithClassName:@"DreamBits"];

    for (NSString* currentString in directoryContents){

        NSLog(@"%@",currentString);
        NSString *temp2 = [temp stringByAppendingPathComponent:currentString];
        PFFile *file = [PFFile  fileWithName:currentString contentsAtPath:temp2];

            if ([currentString isEqualToString:@"index.html"]) {
                [obj setObject:file forKey:@"index"];
            }
            else {
                count += 1;

                NSString *filen = [NSString stringWithFormat:@"file%i",count];
                NSLog(@"%@",filen);

                [obj setObject:file forKey:filen];
            }
    }

    [obj saveInBackground];

在循环外部创建PFObject。将所有PFFile对象设置为循环内部的PFObject

循环后，保存PFObject。最好使用以下方法：

        [obj saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error)
        {
               //Check whether the upload is succeeded or not
        }];

---

我使用此方法在Parse Server表中的一行中上载配置文件和拇指图像。使用swift 4和Parse SDK 1.17.1。希望这项技术能有所帮助

   func uploadImage(profileImage: UIImage, profileImageName: String, thumbImage: UIImage, thumbImageName: String) {

    if let profileImagefile = PFFile.init(name: profileImageName, data: profileImage.jpegData(compressionQuality: 1)!) {
        let fileObject = PFObject(className:"ProfileImage")
        fileObject.setValue(profileImagefile, forKey: "profile_image")
        fileObject.saveInBackground { (success, error) in
            if error == nil {
                print("thumb image path: \(profileImagefile.url ?? "")")
                if let thumbImage = PFFile.init(name: thumbImageName, data: thumbImage.jpegData(compressionQuality: 0.5)!) {
                    fileObject.setValue(thumbImage, forKey: "thumb_image")
                    fileObject.saveInBackground(block: { (result, fileError) in
                        if fileError == nil {
                            print("thumb image path: \(thumbImage.url ?? "")")
                        }else {
                            print("error on thumb upload: \(result)")
                        }
                    })
                }
            }else {
                print("error on file upload: \(error.debugDescription)")
            }
        }
    }
}

---

您还需要等待文件保存完成后再将其附加到对象，这在Objective-C中有点困难，没有承诺。@TimothyWalters是的，我同意。文件必须在附加到PFObject之前上载。而且很难跟踪多个文件。由于这个原因，我不会单独上传文件。在上面的代码中，PFFile将作为PFObject保存操作的一部分上传。