使用 $scope 函数更改全局变量的值

Question

我定义了两个 Date 类型的全局变量，并在函数中更改了值，但不知何故，在运行函数后，全局变量的值没有采用新值。问题是什么？ 提前致谢！

var value1 = new Date()
var value2 = new Date()
var $scope = self.ctx


$scope.settimes = function() {
value1.setSeconds(0)
value1.setMinutes(15)
value1.setHours(6)

value2.setSeconds(0)
value2.setMinutes(30)
value2.setHours(12)

}

console.log(value1)
console.log(value2) //value1 and value2 still have the same value =new Date() but not be assigned with the values within the function

<button ng-click="settimes()">Change Time</button> 

Answer 1

您的console.log 需要在函数内部。 代码将从上到下运行，您定义函数然后立即调用console.log。但是值只有在你点击按钮后才会改变，所以你需要检查函数内部的值。

var value1 = new Date()
var value2 = new Date()
var $scope = self.ctx


$scope.settimes = function() {
  value1.setSeconds(0)
  value1.setMinutes(15)
  value1.setHours(6)

  value2.setSeconds(0)
  value2.setMinutes(30)
  value2.setHours(12)

  console.log(value1)
  console.log(value2)
}

 //value1 and value2 still have the same value =new Date() but not be assigned with the values within the function

<button ng-click="settimes()">Change Time</button>