撰写FontFamily错误：“变量必须初始化”

Question

我试图将字体添加到我的应用程序中，但是当我在Type.kt文件中声明字体时，我会看到这样的错误：

必须初始化

变量“iranSansFontFamily”

我为什么要犯这个错误？

下面是代码：

val CustomTypography = Typography(
    bodyLarge = TextStyle(
        fontFamily = iranSansFontFamily,
        fontWeight = FontWeight.Normal,
        fontSize = 16.sp,
        lineHeight = 24.sp,
        letterSpacing = 0.5.sp
    )
)

val iranSansFontFamily = FontFamily(
    Font(R.font.iransans_farsi_medium, FontWeight.Medium),
    Font(R.font.iransans_farsi_bold, FontWeight.Bold)
)

Answer 1

字体系列的声明必须位于排版的顶部，如下所示：

val iranSansFontFamily = FontFamily(
    Font(R.font.iransans_farsi_medium, FontWeight.Medium),
    Font(R.font.iransans_farsi_bold, FontWeight.Bold)
)

val CustomTypography = Typography(
    bodyLarge = TextStyle(
        fontFamily = iranSansFontFamily,
        fontWeight = FontWeight.Normal,
        fontSize = 16.sp,
        lineHeight = 24.sp,
        letterSpacing = 0.5.sp
    )
)