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我无法将 JSON 映射到我的实体。错误消息是：添加映射错误：找不到 keyPath 的对象映射：''。我正在使用以下代码：

RKObjectMapping *lEgmMapping = [RKObjectMapping mappingForClass:[EGM 
class]]; 
    [lEgmMapping mapKeyPath:@"Id" toAttribute:@"Id"]; 
    [lEgmMapping mapKeyPath:@"InternalId" toAttribute:@"internalId"]; 
    [lEgmMapping mapKeyPath:@"PlayerType" toAttribute:@"playerType"]; 
    [lEgmMapping mapKeyPath:@"PositionX" toAttribute:@"x"]; 
    [lEgmMapping mapKeyPath:@"PositionY" toAttribute:@"y"]; 
    [lEgmMapping mapKeyPath:@"Size" toAttribute:@"size"]; 
    [lEgmMapping mapKeyPath:@"Status" toAttribute:@"status"]; 
    [[RKObjectManager sharedManager].mappingProvider 

    setMapping:lEgmMapping forKeyPath:@"GetEgmMarkersBySiteResult"];

我正在从 Web 服务获取以下 JSON：

{"GetEgmMarkersBySiteResult":[{"Id": 
94,"InternalId":"A2345","PlayerType":"2","PositionX":686,"PositionY": 
1460,"Size":23,"Status":"0"},{"Id": 
83,"InternalId":"A1002a","PlayerType":"0","PositionX":1414,"PositionY": 
906,"Size":30,"Status":"0"},{"Id": 
81,"InternalId":"asd","PlayerType":"0","PositionX":1338,"PositionY": 
925,"Size":33,"Status":"0"}]}

我究竟做错了什么？谢谢你。

编辑：事实证明，当它在 appdelegate applicationlaunchedwithoptions 上时找不到映射，我认为这是加载绑定的好地方。您认为哪里是加载绑定的好地方？如果另一个视图控制器定义了相同的绑定，它会导致运行时错误吗？

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