我正在使用RestKit来驱动与我的Web服务器的互动.我正在尝试使用路由将一个Event对象POST到一个连接到它的服务器上.代码如下：
RKObjectManager *manager = [RKObjectManager sharedManager];
RKObjectMapping *map = [self eventMapping];
manager.serializationMIMEType = RKMIMETypeFormURLEncoded;
map.rootKeyPath = @"event";
[manager.mappingProvider setSerializationMapping:map forClass:[Event class]];
[manager.router routeClass:[Event class] toResourcePath:@"/v1/events.json" forMethod:RKRequestMethodPOST];
[manager postObject:event delegate:self block:^(RKObjectLoader *loader){
RKObjectMapping *serMap = [[[RKObjectManager sharedManager] mappingProvider] serializationMappingForClass:[Event class]];
NSError *error = nil;
NSDictionary *d = [[RKObjectSerializer serializerWithObject:event mapping:serMap] serializedObject:&error];
RKParams *p = [RKParams paramsWithDictionary:d];
[p setData:[event imageData] MIMEType:@"image/jpeg" forParam:@"image"];
loader.params = p;
}];
如果我使用序列化的事件对象创建一个RKParams的实例,则添加图像数据并将其分配为RKObjectLoader的params属性,所有属性都将成为一个巨大的序列化字符串.必须有一种方法来上传图像,而不需要大量字符串序列化.
我还尝试将NSData属性映射到某个属性,将UIImage转换为NSData,但RestKit抱怨说它无法映射.以前有人做过吗？
解决方法
我做了非常相似的事情,它的工作很好.我意识到你的问题是为什么RKObjectSerializer不按照你的期望工作,但也许这是你的设置的其他东西.我发布我的代码,给出一个干净的例子.也就是说,在阅读RKObjectSerializer文档之后,我不明白为什么你不能像我的例子那样直接初始化RKParams,而不是直接设置它们.
路由器设置：
RKObjectManager *objectManager = [RKObjectManager objectManagerWithBaseURL:kApiUrlBase]; [objectManager.router routeClass:[PAPetPhoto class] toResourcePath:@"/pet/uploadPhoto" forMethod:RKRequestMethodPOST];
映射设置：
RKObjectMapping *papetPhotoMapping = [RKObjectMapping mappingForClass:[PAPetPhoto class]]; [papetPhotoMapping mapKeyPath:@"id" toAttribute:@"identifier"]; [papetPhotoMapping mapAttributes:@"accountId",@"petId",@"photoId",@"filename",@"contentType",nil]; [objectManager.mappingProvider addObjectMapping:papetPhotoMapping]; [objectManager.mappingProvider setSerializationMapping:[papetPhotoMapping inverseMapping] forClass:[PAPetPhoto class]]; [objectManager.mappingProvider setMapping:papetPhotoMapping forKeyPath:@"petPhoto"];
(我注意到,自从我建立了所有我的params在块中我的对象只是一个虚拟实例来触发正确的路由和映射器).
PAPetPhoto *photo = [[PAPetPhoto alloc] init];
[[RKObjectManager sharedManager] postObject:photo delegate:self block:^(RKObjectLoader *loader){
RKParams* params = [RKParams params];
[params setValue:pet.accountId forParam:@"accountId"];
[params setValue:pet.identifier forParam:@"petId"];
[params setValue:_photoId forParam:@"photoId"];
[params setValue:_isThumb ? @"THUMB" : @"FULL" forParam:@"photoSize"];
[params setData:data MIMEType:@"image/png" forParam:@"image"];
loader.params = params;
}];
服务器端点(Java,Spring MVC)
@RequestMapping(value = "/uploadPhoto",method = RequestMethod.POST)
@ResponseBody
public Map<String,Object> handleFormUpload(@RequestParam("accountId") String accountId,@RequestParam("petId") String petId,@RequestParam("photoId") String photoId,@RequestParam("photoSize") PhotoSizeEnum photoSize,@RequestParam("image") Part image) throws IOException {
if (log.isTraceEnabled())
log.trace("uploadPhoto. accountId=" + accountId + " petId=" + petId + " photoId=" + photoId + " photoSize=" + photoSize);
PetPhoto petPhoto = petDao.savePetPhoto(accountId,petId,photoId,photoSize,image);
Map<String,Object> map = GsonUtils.wrapWithKeypath(petPhoto,"petPhoto");
return map;
}
服务器响应JSON(注意对应于映射设置的“petPhoto”的keyPath)：
{
petPhoto = {
accountId = 4ebee3469ae2d8adf983c561;
contentType = "image/png";
filename = "4ebee3469ae2d8adf983c561_4ec0983d036463d900841f09_3FED4959-1042-4D8B-91A8-76AA873851A3";
id = 4ee2e80203646ecd096d5201;
petId = 4ec0983d036463d900841f09;
photoId = "3FED4959-1042-4D8B-91A8-76AA873851A3";
};
}
代表：
- (void) objectLoader:(RKObjectLoader*)objectLoader didLoadObject:(id)object {
if ([objectLoader wasSentToResourcePath:@"/pet/uploadPhoto"]) {
PAPetPhoto *photo = (PAPetPhoto*)object;
}
}
