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;
- }
- }