Angular 拆分并以角度显示字符串值的步骤

我在

下拉列表中显示名为
customer
的api，通过选择特定客户，我在输入字段中显示所选客户详细信息（所选customer对象的属性）（即电话、时间），如下所示：

   <input matInput  placeholder="Hours" matInput [value]="customer?.timeArray[0]" >
</mat-form-field> -->
<mat-form-field  class="timings-hrs">
   <input matInput  placeholder="Minutes" matInput [value]="customer?.time | timepart : 'mm'" >
</mat-form-field>
<mat-form-field  class="timings-min">
   <input matInput  placeholder="Seconds" matInput [value]="customer?.time | timepart : 'ss'" >


   <input matInput  placeholder="Hours" matInput [value]="customer?.timeArray[0]" >
</mat-form-field> -->
<mat-form-field  class="timings-hrs">
   <input matInput  placeholder="Minutes" matInput [value]="customer?.time | timepart : 'mm'" >
</mat-form-field>
<mat-form-field  class="timings-min">
   <input matInput  placeholder="Seconds" matInput [value]="customer?.time | timepart : 'ss'" >

属性时间是一个
字符串
，我想按如下方式拆分和显示此字符串：

   <input matInput  placeholder="Hours" matInput [value]="customer?.timeArray[0]" >
</mat-form-field> -->
<mat-form-field  class="timings-hrs">
   <input matInput  placeholder="Minutes" matInput [value]="customer?.time | timepart : 'mm'" >
</mat-form-field>
<mat-form-field  class="timings-min">
   <input matInput  placeholder="Seconds" matInput [value]="customer?.time | timepart : 'ss'" >


   <input matInput  placeholder="Hours" matInput [value]="customer?.timeArray[0]" >
</mat-form-field> -->
<mat-form-field  class="timings-hrs">
   <input matInput  placeholder="Minutes" matInput [value]="customer?.time | timepart : 'mm'" >
</mat-form-field>
<mat-form-field  class="timings-min">
   <input matInput  placeholder="Seconds" matInput [value]="customer?.time | timepart : 'ss'" >

我试图通过拼接方法拼接它，但我无法实现

   <input matInput  placeholder="Hours" matInput [value]="customer?.timeArray[0]" >
</mat-form-field> -->
<mat-form-field  class="timings-hrs">
   <input matInput  placeholder="Minutes" matInput [value]="customer?.time | timepart : 'mm'" >
</mat-form-field>
<mat-form-field  class="timings-min">
   <input matInput  placeholder="Seconds" matInput [value]="customer?.time | timepart : 'ss'" >

在您的列表中.component.html
   <input matInput  placeholder="Hours" matInput [value]="customer?.timeArray[0]" >
</mat-form-field> -->
<mat-form-field  class="timings-hrs">
   <input matInput  placeholder="Minutes" matInput [value]="customer?.time | timepart : 'mm'" >
</mat-form-field>
<mat-form-field  class="timings-min">
   <input matInput  placeholder="Seconds" matInput [value]="customer?.time | timepart : 'ss'" >

试着像这样使用split

<mat-form-field class="timings-days">
   <input matInput  placeholder="Hours" matInput [value]="customer?.time.split(':')[0]" >
</mat-form-field>
<mat-form-field  class="timings-hrs">
   <input matInput  placeholder="Minutes" matInput [value]="customer?.time.split(':')[1]" >
</mat-form-field>
<mat-form-field  class="timings-min">
   <input matInput  placeholder="Seconds" matInput [value]="customer?.time.split(':')[2]" >
</mat-form-field>

   <input matInput  placeholder="Hours" matInput [value]="customer?.timeArray[0]" >
</mat-form-field> -->
<mat-form-field  class="timings-hrs">
   <input matInput  placeholder="Minutes" matInput [value]="customer?.time | timepart : 'mm'" >
</mat-form-field>
<mat-form-field  class="timings-min">
   <input matInput  placeholder="Seconds" matInput [value]="customer?.time | timepart : 'ss'" >

我认为最好使用自定义管道，而不是使用html登录。这可能会引起问题。更广泛的方法是创建自定义管道，并将逻辑保存到单独的文件中。这里介绍了如何创建自定义管道

   <input matInput  placeholder="Hours" matInput [value]="customer?.timeArray[0]" >
</mat-form-field> -->
<mat-form-field  class="timings-hrs">
   <input matInput  placeholder="Minutes" matInput [value]="customer?.time | timepart : 'mm'" >
</mat-form-field>
<mat-form-field  class="timings-min">
   <input matInput  placeholder="Seconds" matInput [value]="customer?.time | timepart : 'ss'" >

管道：

import { Pipe, PipeTransform } from '@angular/core';

@Pipe({
  name: 'timepart'
})
export class TimePartPipe implements PipeTransform {

  transform(value: any, part: string, symbol: string): string {
    if (symbol == "" || symbol == null) {
      symbol = ":";
    }
    var i = value.split(symbol);
    if (part == "hh")
      return i[0];
    if (part == "mm")
      return i[1];
    if (part == "ss")
      return i[2];
  }

}

   <input matInput  placeholder="Hours" matInput [value]="customer?.timeArray[0]" >
</mat-form-field> -->
<mat-form-field  class="timings-hrs">
   <input matInput  placeholder="Minutes" matInput [value]="customer?.time | timepart : 'mm'" >
</mat-form-field>
<mat-form-field  class="timings-min">
   <input matInput  placeholder="Seconds" matInput [value]="customer?.time | timepart : 'ss'" >

HTML：
//传递要作为参数的符号和部分

   <input matInput  placeholder="Hours" matInput [value]="customer?.timeArray[0]" >
</mat-form-field> -->
<mat-form-field  class="timings-hrs">
   <input matInput  placeholder="Minutes" matInput [value]="customer?.time | timepart : 'mm'" >
</mat-form-field>
<mat-form-field  class="timings-min">
   <input matInput  placeholder="Seconds" matInput [value]="customer?.time | timepart : 'ss'" >


-->

这是处理HTML输出的更合适的方法

   <input matInput  placeholder="Hours" matInput [value]="customer?.timeArray[0]" >
</mat-form-field> -->
<mat-form-field  class="timings-hrs">
   <input matInput  placeholder="Minutes" matInput [value]="customer?.time | timepart : 'mm'" >
</mat-form-field>
<mat-form-field  class="timings-min">
   <input matInput  placeholder="Seconds" matInput [value]="customer?.time | timepart : 'ss'" >

演示：

   <input matInput  placeholder="Hours" matInput [value]="customer?.timeArray[0]" >
</mat-form-field> -->
<mat-form-field  class="timings-hrs">
   <input matInput  placeholder="Minutes" matInput [value]="customer?.time | timepart : 'mm'" >
</mat-form-field>
<mat-form-field  class="timings-min">
   <input matInput  placeholder="Seconds" matInput [value]="customer?.time | timepart : 'ss'" >