使用Restkit映射文件夹结构

Question

我需要映射一个遵循Dropbox使用的类似模式的文件夹结构。当用户浏览树时，REST服务器会返回需要使用Restkit映射到核心数据的附加JSON数据。我的JSON如下：

{ 
    "object_id": "19BEB55D78EA431EA555CA7ADD72DCA6", 
    "class": "sfaccount", 
    "files": [ 
     { 
      "file_id": "78234782437892438792487942", 
      "bytes": 0, 
      "created": "2012-11-12T03:42:55.0000000", 
      "modified": "2012-11-12T03:42:55.0000000", 
      "path": "/", 
      "is_dir": true, 
      "contents": [ 
       { 
        "file_id": "980234890234890234980234890", 
        "name": "file1.xls", 
        "created": "2012-11-12T03: 42: 55.0000000", 
        "modified": "2012-11-12T03: 42: 55.0000000", 
        "path": "/file1.xls", 
        "is_dir": false, 
        "mime_type": "text/xls", 
        "bytes": 78810 
       }, 
       { 
        "file_id": "924384238903429802439802890", 
        "name": "file2.pdf", 
        "created": "2012-11-12T03: 42: 55.0000000", 
        "modified": "2012-11-12T03: 42: 55.0000000", 
        "path": "/file2.pdf", 
        "is_dir": false, 
        "mime_type": "text/pdf", 
        "bytes": 15350 
       }, 
       { 
        "file_id": "980349082498024390832490249", 
        "name": "sub folder 1", 
        "created": "2012-11-12T03: 42: 55.0000000", 
        "modified": "2012-11-12T03: 42: 55.0000000", 
        "path": "/sub folder 1", 
        "is_dir": true, 
        "bytes": 0 
       } 
      ] 
     } 
    ] 
}; 

如果用户浏览最多“子文件夹1”时，JSON是：

{ 
    "object_id": "19BEB55D78EA431EA555CA7ADD72DCA6", 
    "class": "sfaccount", 
    "files": [ 
     { 
      "file_id": "980349082498024390832490249", 
      "name": "sub folder 1", 
      "created": "2012-11-12T03: 42: 55.0000000", 
      "modified": "2012-11-12T03: 42: 55.0000000", 
      "path": "/sub folder 1", 
      "is_dir": true, 
      "bytes": 0, 
      "contents": [ 
       { 
        "file_id": "564765785685856856658567575", 
        "name": "file1.xls", 
        "created": "2012-11-12T03: 42: 55.0000000", 
        "modified": "2012-11-12T03: 42: 55.0000000", 
        "path": "/sub folder 1/file1.xls", 
        "is_dir": false, 
        "mime_type": "text/xls", 
        "bytes": 78810 
       }, 
       { 
        "file_id": "345687656675856790676786789", 
        "name": "file2.pdf", 
        "created": "2012-11-12T03: 42: 55.0000000", 
        "modified": "2012-11-12T03: 42: 55.0000000", 
        "path": "/sub folder 1/file2.pdf", 
        "is_dir": false, 
        "mime_type": "text/pdf", 
        "bytes": 15350 
       }, 
       { 
        "file_id": "434546785689689667679988698", 
        "name": "sub folder 2", 
        "created": "2012-11-12T03: 42: 55.0000000", 
        "modified": "2012-11-12T03: 42: 55.0000000", 
        "path": "/sub folder 1/sub folder 2", 
        "is_dir": true, 
        "bytes": 0 
       } 
      ] 
     } 
    ] 
} 

我不能确定有关模型结构和如何创建与Restkit进行映射。

Answer 1

这是您用来映射该JSON对象的对象映射。 FileObject类中的“contents”属性应该是一个NSArray，并将填充一个FileObjects数组。

RKObjectMapping *fileMapping = [RKObjectMapping mappingForClass:[FileObject class]]; 

[fileMapping addAttributeMappingsFromArray:@[@"file_id",@"bytes",@"created",@"modified",@"path",@"is_dir"]]; 
RKRelationshipMapping *subFileMapping = [RKRelationshipMapping relationshipMappingFromKeyPath:@"contents" toKeyPath:@"contents" withMapping:fileMapping]; 

[fileMapping addPropertyMapping:subFileMapping];