cannot initialize a parameter of type 'IPCameraNightMode' with an rvalue of type 'int'

在.mm文件中设置一个枚举变量时，XCode 报了下面错误：

Cannot initialize a parameter of type 'IPCameraNightMode' with an rvalue of type ''int"

上starckoverflow看了一下，原来是在引用枚举值的时候前面需要做一个类型强行转换。

[self setNModeBtns:nightModeInter_old];-》

[self
setNModeBtns:(IPCameraNightMode)nightModeInter_old];
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