iOS -通过Resty将图像发布到服务器

Question

我之前使用this method将图片发布到服务器，但这有点复杂，因为我必须自己添加标题和边界。昨天我发现了一个名为Resty的项目--“一个简单的Objective-C client for iOS and Mac”。然而，在阅读了它的所有文档后，我找不到任何上传图像文件的方法。请帮帮忙，非常感谢。

NSMutableDictionary *params = [NSMutableDictionary dictionary];
[params setObject:@"this is a title" forKey:@"title"];

// ***How can I add an image by Resty?***
[params setObject:UIImageJPEGRepresentation(self.image, 1.0) forKey:@"image"];

LRRestyClient *client = [LRResty client];
[client setUsername:userId password:userToken];
[client post:APIImageUrl payload:params withBlock:^(LRRestyResponse *response){
    NSLog(@"Done");
}];

Answer 1

我认为这个框架不能正确处理图像数据和自定义参数，您可以按照这个主题创建正确的NSData格式

How to upload image and text using HTTP POST?

或者，如果你个人想要更成熟的框架，我建议你使用restkit。在我的项目中，我使用以下示例代码将图像发送到rest服务

 RKObjectManager *service = restkit_manager; //initialized previously
      [service loadObjectsAtResourcePath:@"/api/ChangeProfileImage" usingBlock:^(RKObjectLoader *loader) {
            loader.delegate      = self;
            loader.method        = RKRequestMethodPOST;
            loader.cachePolicy   = RKRequestCachePolicyNone;
            loader.objectMapping = (RKObjectMapping *) [service.mappingProvider mappingForKeyPath:MAPPING_PROFILE_IMAGE_UPDATE];

            NSMutableDictionary *params_dict = [NSMutableDictionary new];

           //custom parameters
           [params_dict setValue:UserKey forKey:@"UserKey"];

            RKParams *params = [RKParams paramsWithDictionary:params_dict];
            //encoded image
            [params setData:data MIMEType:@"image/png" forParam:@"FileName"];

            loader.params                = params;
            loader.serializationMIMEType = RKMIMETypeJSON;
        }];

此幻灯片可能会提供idea http://www.slideshare.net/tkalapun/restfull-with-restkit

Answer 2

我使用的是ASIHTTPRequest，它非常简单和强大。我认为使用这个库是另一种选择。

我的示例代码是...

NSURL *url = [NSURL URLWithString:@"http://endpoint"];
NSData *data = [self addMetadata:UIImageJPEGRepresentation(self.image, 1.0)];

ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
[ASIFormDataRequest setDefaultTimeOutSeconds:90];
[ASIFormDataRequest setShouldThrottleBandwidthForWWAN:YES];

[request setNumberOfTimesToRetryOnTimeout:3];
[request setAllowCompressedResponse:NO];

[request setData:data withFileName:@"photo.jpg" andContentType:@"image/jpeg" forKey:@"image"];
[request startSynchronous];