RestKit在RKEntityMapping線

Question

崩潰我新的Objective-C和非常套牢RestKit。我想我的Web服務器上創建一個與JSON數據非常簡單UITableView，我一直停留了一段時間。

這是我簡單的JSON：

{ 
    "restaurants": [ 
     { 
      "id": "27", 
      "franchise_name": "Franchise 1", 
      "branch_name": "Branch 1", 
      "branch_phone": "0200 111 0000", 
      "cuisine": "Salad", 
      "cooking_time": "15", 
      "is_open": 1 
     }, 
     { 
      "id": "97", 
      "franchise_name": "Franchise 2", 
      "branch_name": "Branch 2", 
      "branch_phone": "0207 222 0000", 
      "cuisine": "Healthy", 
      "cooking_time": "10", 
      "is_open": 1 
     } 
    ] 
} 

這是我的核心數據模型：

Entities: Restaurant 
    Attributes: branchName -> String 
    franchiseName -> String 
    id -> integer 16 
    readyTime-> integer 16 

我在我的視圖控制器下面的代碼。在viewDidLoad，RKEntityMapping導致異常：

RKManagedObjectStore *managedObjectStore = [RKManagedObjectStore defaultStore]; 

RKEntityMapping *entityMapping = [RKEntityMapping mappingForEntityForName:@"Restaurant" inManagedObjectStore:managedObjectStore]; //THIS LINE CAUSES THE CRASH 

[entityMapping addAttributeMappingsFromDictionary:@{ 
                @"id":    @"id", 
                @"cooking_time": @"readyTime", 
                @"branch_name": @"branchName", 
                @"franchise_name": @"franchiseName"}]; 

RKLogConfigureByName("RestKit/Network", RKLogLevelTrace); 

RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:entityMapping pathPattern:@"/api/restaurants" keyPath:nil statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)]; //I GET AN ISSUE HERE AS WELL INVOLVING responseDescriptorWithMapping BEING DEPRECIATED. 

NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http//mywebserver.com/api/resturants"]]; 

RKManagedObjectRequestOperation *managedObjectRequestOperation = [[RKManagedObjectRequestOperation alloc] initWithRequest:request responseDescriptors:@[ responseDescriptor ]]; 

managedObjectRequestOperation.managedObjectContext = self.managedObjectContext; 

[[NSOperationQueue currentQueue] addOperation:managedObjectRequestOperation]; 

有幾個錯誤信息沒有一個我真正得到：

NSAssert(objectClass, @"Cannot initialize an entity mapping for an entity with a nil managed object class: Got nil class for managed object class name '%@'. Maybe you forgot to add the class files to your target?", [entity managedObjectClassName]); 

在控制檯：

*** Assertion failure in -[RKEntityMapping initWithEntity:], 

Answer 1

responseDescriptorWithMapping已過時，它現在有一個額外的method參數。這只是一個警告 - 你應該更新，但你不必。

如果第一次嘗試使用managedObjectStore時發生崩潰，則表明您沒有正確/完全配置Core Data堆棧（或者您的實體名稱/類名稱錯誤）。查詢this doc，瞭解需要什麼設置的簡單概述。如果您想使用對象管理器，請檢查this doc。