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我正在使用Swift 1.1和xCode 6.1.1

尝试从值和时间刻度中提取秒数时收到以下错误

PATH/ViewControllers/Camera/CaptureScreenViewController.swift:41:58: 'Int32' is not convertible to 'Int32'

在下一行

var seconds = CMTimeMakeWithSeconds(Float64(value),timescale)

在,timescale)

下面是几行供参考

var currentCellSegment = segmentForIndexPath(indexPath) var value = currentCellSegment.duration.value.value var timescale = currentCellSegment.duration.timescale.value var seconds = CMTimeMakeWithSeconds(Float64(value),timescale)

有关如何修复的任何建议？或者回答为什么会这样？

我尝试过的事情

我已经卸载了 xCode，重新启动并重新安装。

我已经尝试过这样timescale as Int32投

var timescale = currentCellSegment.duration.timescale.value as Int32

var timescale: Int32 = currentCellSegment.duration.timescale.value

var timescale: Int32 = currentCellSegment.duration.timescale.value as Int32

，但我收到在线错误var timescale...

正如@martin-r所建议的那样

新的参考代码

var currentCellSegment = segmentForIndexPath(indexPath) var value = currentCellSegment.duration.value var timescale = currentCellSegment.duration.timescale var seconds = CMTimeMakeWithSeconds(Float64(value),timescale)

解决了

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1 回答 1

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错误信息确实有点奇怪，但解决办法大概是去掉不必要的.value调用：

var value = currentCellSegment.duration.value
var timescale = currentCellSegment.duration.timescale

如果currentCellSegment.duration是 astruct CMTime那么它的 timescale属性是 a CMTimeScaleaka Int32，这就是CMTimeMakeWithSeconds()预期的。

的value属性Int32返回 a Builtin.Int32，这会导致奇怪的错误消息。例子：

func abc(x : Int32) {
    println(x)
}
let x = Int32(1)
abc(x)       // OK
abc(x.value) // error: 'Int32' is not convertible to 'Int32'
于 2015-03-31T20:04:06.800 回答