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Flutter从map获取密钥

代码示例

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flutter从map获取密钥 

String key = values.keys.elementAt(index);
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使用key flutter从map获取值 

String value = myMap["mykey"];
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flutter创建新地图 

Map<String, int> map1 = {'zero': 0, 'one': 1, 'two': 2};
Map map2 = {'zero': 0, 'I': 'one', 10: 'X'};
var map3 = {'zero': 0, 'I': 'one', 10: 'X'};

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flutter从map获取密钥

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