使用kotlin错误提供的参数不能调用以下任何函数

Question

我正在尝试一些kotlin的基础知识 - >

计划：

fun createDate(day: Int, month: Int, year: Int, hour: Int = 0, minute: Int = 0, second: Int = 0) {
print("TEST", "$day-$month-$year $hour:$minute:$second")
}
createDate(1,7,1997)

错误：

error: none of the following functions can be called with the arguments supplied: 
@InlineOnly public inline fun print(message: Any?): Unit defined in kotlin.io
@InlineOnly public inline fun print(message: Boolean): Unit defined in kotlin.io
@InlineOnly public inline fun print(message: Byte): Unit defined in kotlin.io
@InlineOnly public inline fun print(message: Char): Unit defined in kotlin.io
@InlineOnly public inline fun print(message: CharArray): Unit defined in kotlin.io
@InlineOnly public inline fun print(message: Double): Unit defined in kotlin.io
@InlineOnly public inline fun print(message: Float): Unit defined in kotlin.io
@InlineOnly public inline fun print(message: Int): Unit defined in kotlin.io
@InlineOnly public inline fun print(message: Long): Unit defined in kotlin.io
@InlineOnly public inline fun print(message: Short): Unit defined in kotlin.io
print("TEST", "$day-$month-$year $hour:$minute:$second")

任何想法我做错了什么，我跟着这个 - > https://www.toptal.com/software/kotlin-android-language

Answer 1

它应该是这样的，因为kotlin默认打印功能只有一个参数

fun createDate(day: Int, month: Int, year: Int, hour: Int = 0, minute: Int = 0, second: Int = 0) {
    print("$day-$month-$year $hour:$minute:$second")
}

因为kotlin默认打印功能是这样的

/** Prints the given message and newline to the standard output stream. */
public expect fun println(message: Any?)

 /** Prints the given message to the standard output stream. */
public expect fun print(message: Any?)

所以你不能在打印功能中发送双参数。所以使用

print("$day-$month-$year $hour:$minute:$second")

代替

print("TEST", "$day-$month-$year $hour:$minute:$second")