jetpackCompose中带有类型的条件操作
jetpackCompose中带有类型的条件操作
提问于 2022-10-08 07:17:02
如何使类型是可选的，如果它不是从外部传递的，则不应呈现第二个文本。现在获取一个错误Type mismatch: inferred type is String but Boolean was expected
@Composable
fun FieldLabel(
label: String,
secondaryLabel: String?,
modifier: Modifier = Modifier,
) {
Text(
text = label,
textAlign = TextAlign.End,
modifier = Modifier
.fillMaxWidth(),
fontWeight = FontWeight.Bold,
fontSize = 24.sp,
color = Color.Black,
)
//How to write this part so that if there is not secondaryLabel provided than the text part does not render
secondaryLabel ? Text(
text = secondaryLabel,
modifier = Modifier
.fillMaxWidth()
fontWeight = FontWeight.Bold,
fontSize = 24.sp,
color = Color.Black,
) : null
}Stack Overflow用户
回答已采纳
发布于 2022-10-08 07:22:15
您可以将null的默认值赋给secondaryLabel，如果它不是null，则可以呈现该文本。
@Composable
fun FieldLabel(
label: String,
secondaryLabel: String? = null,
modifier: Modifier = Modifier,
) {
Text(
text = label,
textAlign = TextAlign.End,
modifier = Modifier
.fillMaxWidth(),
fontWeight = FontWeight.Bold,
fontSize = 24.sp,
color = Color.Black,
)
if(secondaryLabel != null)
Text(
text = secondaryLabel,
modifier = Modifier
.fillMaxWidth()
fontWeight = FontWeight.Bold,
fontSize = 24.sp,
color = Color.Black,
)
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/73995112
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