JavaScript"this"引用了错误的对象

Question

好吧,这并没有真正引用错误的对象,但我不知道如何引用正确的对象.

function someObj() {
   this.someMethod1 = function() {
      var elementBtn = document.getElementById('myBtn');
      elementBtn.onclick = function() { 
         this.someMethod2(); //I want this.someMethod2() to be called
         //...but it tries to call elementBtn.someMethod2() i believe.
      };
   };
   this.someMethod2 = function() {
      alert('OK');
   };
}

因此,当我点击myBtn时,我想要运行someObj.someMethod2().我希望它是someObj,而不是任何其他的 someObj.但是如何？!

Answer 1

您可能需要进行如下调整:

function someObj() {
    var that = this;

    this.someMethod1 = function() {
        var elementBtn = document.getElementById('myBtn');
        elementBtn.onclick = function() { 
            that.someMethod2();
        };
    };
    this.someMethod2 = function() {
       alert('OK');
    };
}

"那"捕获了你追求的范围.