contract NoteContract {//合约声明 //字典类型: mapping,notes是一个键值对，其Key为发布者地址，类型为address，值为每个发布者发布的内容，类型为string[] mapping(address => NoteRecord) public notes;

//constructor() public { }

event NewNote(address spender, NoteRecord note); // event NewNote(address, string note); event ModifyNote(address spender, uint256 index); // event ModifyNote(address, uint index);

struct NoteRecord { uint256 noteId; string noteContent; uint256 chainTime; }

}

收到如下提示：

===========================
> Compiling .\contracts\Migrations.sol
> Compiling .\contracts\NoteContract.sol
> Compiling .\contracts\NoteContract.sol

project:/contracts/NoteContract.sol:10:36: TypeError: This type is only supported in the new experimental ABI encoder. Use "pragma experimental ABIEncoderV2;" to enable the feature.
    event NewNote(address spender, NoteRecord noteDE);