Я новичок в Objective-C и XCode, но даже новичок в RestKit, хотя программировал на Java уже 12 лет.
У меня есть приложение IOS, связанное с RestKit, и действие для загрузки с сервера останова работает только в первый раз, если я вернусь в контроллер навигации и повторю ту же операцию снова, вызывается метод loadObjectsAtResourcePath:delegate, но ни один из методов делегата никогда не вызывался (и я реализовал их все только для регистрации, когда они произойдут).
Я чувствую, что упустил что-то фундаментальное с Restkit и, возможно, асинхронный характер этого, потому что отображение явно работает нормально в первый раз, поэтому последующий вызов должен затеряться в очереди асинхронизации.
Я искал это, и видел, как похожие люди застревают с чем-то похожим, но пробовали их всех и, похоже, не имеют никакого значения. Кэширование отключено, objectLoaderDidLoadUnexpectedResponse и didFailWithError никогда не вызываются, его опускают на пол.
Источник кода:
Мой проект XCode находится на github здесь
Конкретный контроллер просмотра, выполняющий вызов загрузки, здесь (см. метод setUpRestKit)
Последовательность вызовов выглядит следующим образом:
- Пользователь заполняет имя хоста и порт и нажимает
- ESRKConnectionViewController.m получает вызов через prepareForSegue и настраивает общий RKClient с этим адресом (хотя я нахожу позже RKClient не используется много, RKOBjectManager, кажется, занимает только baseURL, поэтому там немного избыточно)
- ESRKServerViewController.m затем устанавливает сопоставление в RKObjectManager и вызывает loadObjectsAtResourcePath, передавая себя как делегат (да, я понимаю, что эти сопоставления должны быть настроены с самого начала в App Delegate, но я не вижу, как настройка этого снова является чем-то большим, чем просто избыточный код)
- обратный вызов objectLoader: didLoadObjects отвечает за прием сопоставленного объекта и настройку модели для представления таблицы - это срабатывает только один раз.
Включение журналов, это шаблон, который я вижу, с аннотациями, когда завершается первый вызов, и когда второй запускается и т.д. (временные метки обрезаны для ясности здесь):
ElasticSearchHeadIOS[25064:fb03] I restkit:RKLog.m:32 RestKit initialized...
ElasticSearchHeadIOS[25064:fb03] I restkit.support:RKCache.m:178 Invalidating cache at path: /Users/paulsmith/Library/Application Support/iPhone Simulator/5.1/Applications/BDB8B59F-8307-4F18-A4E7-C55849618D77/Library/Caches/RKClientRequestCache-localhost/SessionStore
ElasticSearchHeadIOS[25064:fb03] I restkit.network.reachability:RKReachabilityObserver.m:155 Reachability observer initialized with hostname localhost
ElasticSearchHeadIOS[25064:fb03] D restkit.network:RKClient.m:271 Reachability observer changed for client <RKClient: 0x80756e0>, suspending queue <RKRequestQueue: 0x8082600 name=(null) suspended=YES requestCount=0 loadingCount=0/5> until reachability to host 'localhost' can be determined
ElasticSearchHeadIOS[25064:fb03] Connecting to http://localhost:9200/ -- http://localhost:9200/ -- http://localhost:9200/
ElasticSearchHeadIOS[25064:fb03] I restkit.support:RKCache.m:178 Invalidating cache at path: /Users/paulsmith/Library/Application Support/iPhone Simulator/5.1/Applications/BDB8B59F-8307-4F18-A4E7-C55849618D77/Library/Caches/RKClientRequestCache-localhost/SessionStore
ElasticSearchHeadIOS[25064:fb03] I restkit.network.reachability:RKReachabilityObserver.m:155 Reachability observer initialized with hostname localhost
ElasticSearchHeadIOS[25064:fb03] D restkit.network:RKClient.m:271 Reachability observer changed for client <RKClient: 0x8087840>, suspending queue <RKRequestQueue: 0x8087a40 name=(null) suspended=YES requestCount=0 loadingCount=0/5> until reachability to host 'localhost' can be determined
ElasticSearchHeadIOS[25064:fb03] I restkit.network.reachability:RKReachabilityObserver.m:369 Network availability has been determined for reachability observer <RKReachabilityObserver: 0x8088980 host=localhost isReachabilityDetermined=YES isMonitoringLocalWiFi=1039984 reachabilityFlags=-R -----ld>
ElasticSearchHeadIOS[25064:fb03] D restkit.network:RKClient.m:401 Reachability to host 'localhost' determined for client <RKClient: 0x8087840>, unsuspending queue <RKRequestQueue: 0x8087a40 name=(null) suspended=YES requestCount=1 loadingCount=0/5>
ElasticSearchHeadIOS[25064:fb03] D restkit.network:RKRequest.m:435 Sending asynchronous GET request to URL http://localhost:9200/_cluster/state.
ElasticSearchHeadIOS[25064:fb03] T restkit.network:RKRequest.m:381 Prepared GET URLRequest '<NSMutableURLRequest http://localhost:9200/_cluster/state>'. HTTP Headers: {
Accept = "application/json";
"Content-Length" = 0;
}. HTTP Body: .
ElasticSearchHeadIOS[25064:fb03] I restkit.network.reachability:RKReachabilityObserver.m:369 Network availability has been determined for reachability observer <RKReachabilityObserver: 0x6c5c530 host=localhost isReachabilityDetermined=YES isMonitoringLocalWiFi=1039984 reachabilityFlags=-R -----ld>
ElasticSearchHeadIOS[25064:fb03] D restkit.network:RKClient.m:401 Reachability to host 'localhost' determined for client <RKClient: 0x80756e0>, unsuspending queue <RKRequestQueue: 0x8082600 name=(null) suspended=YES requestCount=0 loadingCount=0/5>
ElasticSearchHeadIOS[25064:fb03] D restkit.network:RKResponse.m:195 NSHTTPURLResponse Status Code: 200
ElasticSearchHeadIOS[25064:fb03] D restkit.network:RKResponse.m:196 Headers: {
"Content-Length" = 4462;
"Content-Type" = "application/json; charset=UTF-8";
}
ElasticSearchHeadIOS[25064:fb03] T restkit.network:RKResponse.m:203 Read response body: {"cluster_name":"paul","master_node":"FGewvE3-TEKjXugOGJpWmQ","blocks":{},"nodes":{"FGewvE3-TEKjXugOGJpWmQ":{"name":"Namor the Sub-Mariner","transport_address":"inet[/192.168.0.12:9300]","attributes":{}}},"metadata":{"templates":{},"indices":{"melpaul":{"state":"open","settings":{"index.number_of_replicas":"1","index.number_of_shards":"5","index.version.created":"190299"},"mappings":{"project":{"properties":{"projectAddress":{"type":"string"},"id":{"type":"string"},"suburb":{"type":"string"},"name":{"type":"string"},"state":{"type":"string"},"postalAddress":{"type":"string"},"ownerOrganizationID":{"type":"long"},"shortName":{"type":"string"},"deliveryAddress":{"type":"string"},"country":{"type":"string"}}},"organization":{"properties":{"id":{"type":"string"},"tradingName":{"type":"string"},"name":{"type":"string"},"extParticipant":{"type":"string"},"code":{"type":"string"}}},"task":{"properties":{"aggregateCount":{"type":"long"},"dueDateIso":{"type":"string"},"assignedByUser":{"type":"string"},"pertinent":{"type":"boolean"},"assignedByUserId":{"type":"long"},"assignedBy":{"type":"string"},"projectId":{"type":"long"},"type":{"type":"string"},"id":{"type":"string"},"creationDate":{"type":"long"},"assignedToUserId":{"type":"long"},"description":{"type":"string"},"featureId":{"type":"string"},"aggregated":{"type":"boolean"},"assignedToUser":{"type":"string"},"projectName":{"type":"string"},"dueDate":{"type":"long"},"referenceLabel":{"type":"string"}}},"user":{"properties":{"sortlastName":{"type":"string"},"position":{"type":"string"},"lastName":{"type":"string"},"phone":{"type":"string"},"accessEnabled":{"type":"string"},"orgName":{"type":"string"},"directoryVisibility":{"type":"string"},"id":{"type":"string"},"orgId":{"type":"string"},"orgTradingName":{"type":"string"},"title":{"type":"string"},"divisionName":{"type":"string"},"email":{"type":"string"},"sortfirstName":{"type":"string"},"userName":{"type":"string"},"extParticipant":{"type":"string"},"firstName":{"type":"string"},"accountUnlocked":{"type":"string"},"mobile":{"type":"string"}}}},"aliases":[]}}},"routing_table":{"indices":{"melpaul":{"shards":{"0":[{"state":"STARTED","primary":true,"node":"FGewvE3-TEKjXugOGJpWmQ","relocating_node":null,"shard":0,"index":"melpaul"},{"state":"UNASSIGNED","primary":false,"node":null,"relocating_node":null,"shard":0,"index":"melpaul"}],"1":[{"state":"STARTED","primary":true,"node":"FGewvE3-TEKjXugOGJpWmQ","relocating_node":null,"shard":1,"index":"melpaul"},{"state":"UNASSIGNED","primary":false,"node":null,"relocating_node":null,"shard":1,"index":"melpaul"}],"2":[{"state":"STARTED","primary":true,"node":"FGewvE3-TEKjXugOGJpWmQ","relocating_node":null,"shard":2,"index":"melpaul"},{"state":"UNASSIGNED","primary":false,"node":null,"relocating_node":null,"shard":2,"index":"melpaul"}],"3":[{"state":"STARTED","primary":true,"node":"FGewvE3-TEKjXugOGJpWmQ","relocating_node":null,"shard":3,"index":"melpaul"},{"state":"UNASSIGNED","primary":false,"node":null,"relocating_node":null,"shard":3,"index":"melpaul"}],"4":[{"state":"STARTED","primary":true,"node":"FGewvE3-TEKjXugOGJpWmQ","relocating_node":null,"shard":4,"index":"melpaul"},{"state":"UNASSIGNED","primary":false,"node":null,"relocating_node":null,"shard":4,"index":"melpaul"}]}}}},"routing_nodes":{"unassigned":[{"state":"UNASSIGNED","primary":false,"node":null,"relocating_node":null,"shard":0,"index":"melpaul"},{"state":"UNASSIGNED","primary":false,"node":null,"relocating_node":null,"shard":1,"index":"melpaul"},{"state":"UNASSIGNED","primary":false,"node":null,"relocating_node":null,"shard":2,"index":"melpaul"},{"state":"UNASSIGNED","primary":false,"node":null,"relocating_node":null,"shard":3,"index":"melpaul"},{"state":"UNASSIGNED","primary":false,"node":null,"relocating_node":null,"shard":4,"index":"melpaul"}],"nodes":{"FGewvE3-TEKjXugOGJpWmQ":[{"state":"STARTED","primary":true,"node":"FGewvE3-TEKjXugOGJpWmQ","relocating_node":null,"shard":0,"index":"melpaul"},{"state":"STARTED","primary":true,"node":"FGewvE3-TEKjXugOGJpWmQ","relocating_node":null,"shard":1,"index":"melpaul"},{"state":"STARTED","primary":true,"node":"FGewvE3-TEKjXugOGJpWmQ","relocating_node":null,"shard":2,"index":"melpaul"},{"state":"STARTED","primary":true,"node":"FGewvE3-TEKjXugOGJpWmQ","relocating_node":null,"shard":3,"index":"melpaul"},{"state":"STARTED","primary":true,"node":"FGewvE3-TEKjXugOGJpWmQ","relocating_node":null,"shard":4,"index":"melpaul"}]}},"allocations":[]}
ElasticSearchHeadIOS[25064:1400b] D restkit.network:RKObjectLoader.m:262 Beginning object mapping activities within GCD queue labeled: org.restkit.ObjectMapping
ElasticSearchHeadIOS[25064:1400b] D restkit.network:RKObjectLoader.m:250 No object mapping provider, using mapping provider from parent object manager to perform KVC mapping
ElasticSearchHeadIOS[25064:1400b] T restkit.network:RKObjectLoader.m:187 bodyAsString: {"cluster_name":"paul","master_node":"FGewvE3-TEKjXugOGJpWmQ","blocks":{},"nodes":{"FGewvE3-TEKjXugOGJpWmQ":{"name":"Namor the Sub-Mariner","transport_address":"inet[/192.168.0.12:9300]","attributes":{}}},"metadata":{"templates":{},"indices":{"melpaul":{"state":"open","settings":{"index.number_of_replicas":"1","index.number_of_shards":"5","index.version.created":"190299"},"mappings":{"project":{"properties":{"projectAddress":{"type":"string"},"id":{"type":"string"},"suburb":{"type":"string"},"name":{"type":"string"},"state":{"type":"string"},"postalAddress":{"type":"string"},"ownerOrganizationID":{"type":"long"},"shortName":{"type":"string"},"deliveryAddress":{"type":"string"},"country":{"type":"string"}}},"organization":{"properties":{"id":{"type":"string"},"tradingName":{"type":"string"},"name":{"type":"string"},"extParticipant":{"type":"string"},"code":{"type":"string"}}},"task":{"properties":{"aggregateCount":{"type":"long"},"dueDateIso":{"type":"string"},"assignedByUser":{"type":"string"},"pertinent":{"type":"boolean"},"assignedByUserId":{"type":"long"},"assignedBy":{"type":"string"},"projectId":{"type":"long"},"type":{"type":"string"},"id":{"type":"string"},"creationDate":{"type":"long"},"assignedToUserId":{"type":"long"},"description":{"type":"string"},"featureId":{"type":"string"},"aggregated":{"type":"boolean"},"assignedToUser":{"type":"string"},"projectName":{"type":"string"},"dueDate":{"type":"long"},"referenceLabel":{"type":"string"}}},"user":{"properties":{"sortlastName":{"type":"string"},"position":{"type":"string"},"lastName":{"type":"string"},"phone":{"type":"string"},"accessEnabled":{"type":"string"},"orgName":{"type":"string"},"directoryVisibility":{"type":"string"},"id":{"type":"string"},"orgId":{"type":"string"},"orgTradingName":{"type":"string"},"title":{"type":"string"},"divisionName":{"type":"string"},"email":{"type":"string"},"sortfirstName":{"type":"string"},"userName":{"type":"string"},"extParticipant":{"type":"string"},"firstName":{"type":"string"},"accountUnlocked":{"type":"string"},"mobile":{"type":"string"}}}},"aliases":[]}}},"routing_table":{"indices":{"melpaul":{"shards":{"0":[{"state":"STARTED","primary":true,"node":"FGewvE3-TEKjXugOGJpWmQ","relocating_node":null,"shard":0,"index":"melpaul"},{"state":"UNASSIGNED","primary":false,"node":null,"relocating_node":null,"shard":0,"index":"melpaul"}],"1":[{"state":"STARTED","primary":true,"node":"FGewvE3-TEKjXugOGJpWmQ","relocating_node":null,"shard":1,"index":"melpaul"},{"state":"UNASSIGNED","primary":false,"node":null,"relocating_node":null,"shard":1,"index":"melpaul"}],"2":[{"state":"STARTED","primary":true,"node":"FGewvE3-TEKjXugOGJpWmQ","relocating_node":null,"shard":2,"index":"melpaul"},{"state":"UNASSIGNED","primary":false,"node":null,"relocating_node":null,"shard":2,"index":"melpaul"}],"3":[{"state":"STARTED","primary":true,"node":"FGewvE3-TEKjXugOGJpWmQ","relocating_node":null,"shard":3,"index":"melpaul"},{"state":"UNASSIGNED","primary":false,"node":null,"relocating_node":null,"shard":3,"index":"melpaul"}],"4":[{"state":"STARTED","primary":true,"node":"FGewvE3-TEKjXugOGJpWmQ","relocating_node":null,"shard":4,"index":"melpaul"},{"state":"UNASSIGNED","primary":false,"node":null,"relocating_node":null,"shard":4,"index":"melpaul"}]}}}},"routing_nodes":{"unassigned":[{"state":"UNASSIGNED","primary":false,"node":null,"relocating_node":null,"shard":0,"index":"melpaul"},{"state":"UNASSIGNED","primary":false,"node":null,"relocating_node":null,"shard":1,"index":"melpaul"},{"state":"UNASSIGNED","primary":false,"node":null,"relocating_node":null,"shard":2,"index":"melpaul"},{"state":"UNASSIGNED","primary":false,"node":null,"relocating_node":null,"shard":3,"index":"melpaul"},{"state":"UNASSIGNED","primary":false,"node":null,"relocating_node":null,"shard":4,"index":"melpaul"}],"nodes":{"FGewvE3-TEKjXugOGJpWmQ":[{"state":"STARTED","primary":true,"node":"FGewvE3-TEKjXugOGJpWmQ","relocating_node":null,"shard":0,"index":"melpaul"},{"state":"STARTED","primary":true,"node":"FGewvE3-TEKjXugOGJpWmQ","relocating_node":null,"shard":1,"index":"melpaul"},{"state":"STARTED","primary":true,"node":"FGewvE3-TEKjXugOGJpWmQ","relocating_node":null,"shard":2,"index":"melpaul"},{"state":"STARTED","primary":true,"node":"FGewvE3-TEKjXugOGJpWmQ","relocating_node":null,"shard":3,"index":"melpaul"},{"state":"STARTED","primary":true,"node":"FGewvE3-TEKjXugOGJpWmQ","relocating_node":null,"shard":4,"index":"melpaul"}]}},"allocations":[]}
ElasticSearchHeadIOS[25064:1400b] willMapData
ElasticSearchHeadIOS[25064:fb03] did finish loading
Теперь теперь отображается табличный вид, показывающий сопоставленные данные, которые вернулись из вышеупомянутых вызовов, и я правильно вижу результаты на экране.
Я нажимаю на контроллер навигации, повторю тот же запрос и здесь, что делают журналы. Журналы начинаются сразу после того, как я нажимаю кнопку подключения и запускаю те же вызовы, что и выше (никаких других журналов не происходит между указанным выше блоком и этим ниже).
I restkit.support:RKCache.m:178 Invalidating cache at path: /Users/paulsmith/Library/Application Support/iPhone Simulator/5.1/Applications/BDB8B59F-8307-4F18-A4E7-C55849618D77/Library/Caches/RKClientRequestCache-localhost/SessionStore
I restkit.network.reachability:RKReachabilityObserver.m:155 Reachability observer initialized with hostname localhost
D restkit.network:RKClient.m:271 Reachability observer changed for client <RKClient: 0x808ce90>, suspending queue <RKRequestQueue: 0x80834c0 name=(null) suspended=YES requestCount=0 loadingCount=0/5> until reachability to host 'localhost' can be determined
D restkit.network:RKClient.m:256 Reachability observer changed for RKClient <RKClient: 0x80756e0>, disposing of previous instance: <RKReachabilityObserver: 0x6c5c530 host=localhost isReachabilityDetermined=YES isMonitoringLocalWiFi=1039984 reachabilityFlags=-R -----ld>
Connecting to http://localhost:9200/ -- http://localhost:9200/ -- http://localhost:9200/
I restkit.support:RKCache.m:178 Invalidating cache at path: /Users/paulsmith/Library/Application Support/iPhone Simulator/5.1/Applications/BDB8B59F-8307-4F18-A4E7-C55849618D77/Library/Caches/RKClientRequestCache-localhost/SessionStore
I restkit.network.reachability:RKReachabilityObserver.m:155 Reachability observer initialized with hostname localhost
D restkit.network:RKClient.m:271 Reachability observer changed for client <RKClient: 0x81b0bc0>, suspending queue <RKRequestQueue: 0x81b0d20 name=(null) suspended=YES requestCount=0 loadingCount=0/5> until reachability to host 'localhost' can be determined
D restkit.network:RKClient.m:256 Reachability observer changed for RKClient <RKClient: 0x81b0bc0>, disposing of previous instance: <RKReachabilityObserver: 0x81b1c80 host=localhost isReachabilityDetermined=NO isMonitoringLocalWiFi=1039984 reachabilityFlags=-- ------->
I restkit.network.reachability:RKReachabilityObserver.m:369 Network availability has been determined for reachability observer <RKReachabilityObserver: 0x807f2f0 host=localhost isReachabilityDetermined=YES isMonitoringLocalWiFi=1039984 reachabilityFlags=-R -----ld>
D restkit.network:RKClient.m:401 Reachability to host 'localhost' determined for client <RKClient: 0x808ce90>, unsuspending queue <RKRequestQueue: 0x80834c0 name=(null) suspended=YES requestCount=0 loadingCount=0/5>
Вот Jing screencast о том, как он выглядит в симуляторе (вы можете увидеть точки останова методов-делегатов, получивших название первого время вокруг, но тогда ничего не было 2-го)
