if let tempResult = jsonResult["main"]?["temp"]? as? Double
总是出错：Type "string" does not conform to protocol "NSCopying"
网上有童鞋改成if let tempResult = (jsonResult["main"] as NSDictionary)["temp"] as? Double,确实不报错,但不是很明白原因
EonianStar
2014-10-08
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