typescript 如何从打字稿中的嵌套函数中调用函数？
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How do I call a function from within a nested function in typescript?
提问by user3107338
I want to call the function func2from within sample function of function func1. Can someone suggest a way to achieve that?.
我想func2从 function 的示例函数中调用该函数func1。有人可以建议一种方法来实现这一目标吗？
class A
{
public func1()
{
let sample = function()
{
//call func2... but how?
}
}
public func2()
{
}
}
Thanks in Advance
提前致谢
回答by Tha'er M. Al-Ajlouni
Use the thiskeyword with the arrowfunction notation like this:
使用this带有arrow函数符号的关键字，如下所示：
class A
{
public func1()
{
let sample = () =>
{
this.func2();
}
}
public func2()
{
}
}
The trick is using the arrowfunction, because the arrowfunction changes the definition of thisto be the instance of the classinstead of the current scope.You can read more here
诀窍是使用该arrow函数，因为该arrow函数将 的定义更改this为 的实例class而不是当前范围。您可以在此处阅读更多信息
