通过it将图像上载到DropBox服务器'；iOS中的s核心api提供程序错误

我正在使用DropBox core api OAuth 2.0身份验证，并试图通过其核心api上传UIImage

/

在（/files（POST））找到

我的代码是

-(void)uploadData:(NSData *)imageAsData and:(NSString *)fileName{

NSString *urlString=[NSString stringWithFormat:@"https://api-content.dropbox.com/1/files/dropbox/Apps?access_token=%@",dropBoxToken];


NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init] ;
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:@"POST"];


NSString *boundary = @"---------------------------14737809831466499882746641449";
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
[request addValue:contentType forHTTPHeaderField: @"Content-Type"];


NSMutableData *body = [NSMutableData data];

[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

[body appendData:[[NSString stringWithFormat:@"Content-Disposition: attachment; name=\"attachement\"; filename=\"%@\";",fileName] dataUsingEncoding:NSUTF8StringEncoding]];


[body appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:imageAsData]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[request setHTTPBody:body];




NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

NSLog(@"returnString=%@",returnString);

其中，图像和文件名的NSData中的imageAsData为“abc.jpg”

returnString的输出为{“error”：“文件参数值'None'无效”}

---

我不知道为什么会出现这个问题，请帮助我。

请省去很多麻烦，改用简单得多的端点。（文档中建议使用它是有原因的。）

粗略编辑代码（未经测试）：

-(void)uploadData:(NSData *)imageAsData and:(NSString *)filePath {

    NSString *urlString=[NSString stringWithFormat:
        @"https://api-content.dropbox.com/1/files_put/dropbox/%@?access_token=%@",
        filePath, dropBoxToken];

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
    [request setURL:[NSURL URLWithString:urlString]];
    [request setHTTPMethod:@"PUT"];

    [request setHTTPBody:imageAsData];

    NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
    NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

    NSLog(@"returnString=%@",returnString);
}