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问题描述

我有一个graph.component.ts

I have a graph.component.ts

this.cContainer = cytoscape ( {  
    ready: function(e) { 
      this._dataService.setResultData();
    }
  });

但我得到
错误TypeError:无法读取属性'setResultData 'of undefined

.. so this 似乎是未知的,看起来是正确的因为我在回调中,所以 称为就绪回调。

..so this seems to be unknown, which looks correct because I am within a callback and so this is referred to the ready-callback.

但是我怎么从这个 ready()内部调用 _dataService.setResultData() -callback?

but how would I call _dataService.setResultData() from inside this ready()-callback?

推荐答案

使用箭头功能从捕获此声明上下文。对于函数 ,这由调用者确定,可能不是您的课程:

Use an arrow function to capture this from the declaring context. For function this is determined by the caller and will probably not be your class:

this.cContainer = cytoscape ( {  
    ready: (e) => { 
      this._dataService.setResultData();
    }
  });

这篇关于Anular5-“此”在ready()中无法正常工作的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

10-21 01:36