Angular-表单数组推送特定索引 [英] Angular - Form Array push specific index

问题描述

addStop() {
    const control = <FormArray>this.editForm.controls['stops'];
    control.push(this.initStop());
}

我有这段代码在表单数组的底部添加一个停止".但是我想将新的停靠点"添加到最后一个停靠点之前，而不是最后一个停靠点.

I have this code to add a "stop" at the bottom of the form array. But I want to add the new "stop" not to the last position, but one position before the last stop.

例如，这是行不通的(根本不，我知道数字是错误的.Splice函数根本不存在)

This doesn't work for example (not at all, I know that the numbers are wrong. Splice function doesn't exist at )

control.splice(2, 0, this.initStop());

推荐答案

使用 FormArray #insert :

control.insert(<position>, this.initStop());

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