我正在研究Angular 4项目并在其中使用ng2-CkEditor。我已经覆盖了CkEditor的某些按钮(如“保存”和“预览”)的基本功能,以执行我自己的功能。下面是我的代码
<ckeditor (ready)="OnReady()" [config]="editorConfig" formControlName="EditorNote" #CkEditor>
<ckbutton
[name]="'customButton'"
[command]="'customCmd'"
[label]="'Click Me'"
[toolbar]="'CustomToolBar'"
[icon]="'https://avatars1.githubusercontent.com/u/5500999?v=2&s=16'">
</ckbutton>
</ckeditor>
我正在重写OnReady()方法中的按钮,如下所示:
public OnReady() {
this.CkEditor.instance.addCommand("source", {
exec: function() {
alert("Custom handler for source button ");
}
});
this.CkEditor.instance.addCommand("preview", {
exec: function() {
this.PreviewOfferLetter()
}
});
}
PreviewOfferLetter()方法如下-
public PreviewOfferLetter() {
const editorContentHtml = this.frmReviewOfferLetter.controls["EditorNote"].value;
this._humanResourceService.PreviewCandidateOfferLetter(editorContentHtml).subscribe(
data => {
console.log(data);
},
error => {
console.log(error);
},
() => {
});
}
现在,当我单击“预览”按钮时,它将在控制台中引发错误,提示-
this.PreviewOfferLetter is not a function
请建议我是否做错了什么。预先感谢。
答案 0 :(得分:1)
您正在使用语法丢失类的上下文。考虑切换到粗箭头,以防止出现这种情况:
public OnReady() {
this.CkEditor.instance.addCommand("source", {
exec: () => {
alert("Custom handler for source button ");
}
});
this.CkEditor.instance.addCommand("preview", {
exec: () => {
this.PreviewOfferLetter()
}
});
}
您还可以使用闭包,这比较丑陋,但也可以使用:
public OnReady() {
const self = this;
this.CkEditor.instance.addCommand("source", {
exec: function() {
alert("Custom handler for source button ");
}
});
this.CkEditor.instance.addCommand("preview", {
exec: function() {
self.PreviewOfferLetter()
}
});
}