我有一些類似的數(shù)據(jù)結(jié)構(gòu)，每個(gè)數(shù)據(jù)結(jié)構(gòu)都有一些獨(dú)特的字段。它們都實(shí)現(xiàn)了相同的行為接口 (DataPoint)。因此，它們的處理可以在交換每個(gè)結(jié)構(gòu)的類型并通過接口中定義的方法對(duì)其進(jìn)行操作的同時(shí)完成一次。我想讓一個(gè)函數(shù)根據(jù)某些標(biāo)準(zhǔn)返回每種類型的空數(shù)據(jù)結(jié)構(gòu)。但是，我似乎無(wú)法編譯它，好像我的函數(shù)通過簽名返回接口但實(shí)際上返回了一個(gè)實(shí)現(xiàn)，它抱怨。這是我的意思的簡(jiǎn)化示例和操場(chǎng)示例：https://play.golang.org/p/LxY55BC59Dpackage mainimport "fmt"type DataPoint interface {    Create() }type MetaData struct {    UniqueId string    AccountId int    UserId int}type Conversion struct {    Meta MetaData    Value int}func (c *Conversion) Create() {    fmt.Println("CREATE Conversion")}type Impression struct {    Meta MetaData    Count int}func (i *Impression) Create() {    fmt.Println("CREATE Impression")} func getDataPoint(t string) DataPoint {    if t == "Conversion" {        return &Conversion{}    } else {        return &Impression{}    }}func main() {    meta := MetaData{        UniqueId: "ID123445X",        AccountId: 1,        UserId: 2,    }    dpc := getDataPoint("Conversion")    dpc.Meta = meta    dpc.Value = 100    dpc.Create()    fmt.Println(dpc)    dpi :=  getDataPoint("Impression")    dpi.Meta = meta    dpi.Count = 42    dpi.Create()    fmt.Println(dpi)}編譯產(chǎn)生：prog.go:51: dpc.Meta undefined (type DataPoint has no field or method Meta)prog.go:52: dpc.Value undefined (type DataPoint has no field or method Value)prog.go:58: dpi.Meta undefined (type DataPoint has no field or method Meta)prog.go:59: dpi.Count undefined (type DataPoint has no field or method Count)