Question

简要说明：我需要console.log(i.match)列表中点击的项目。请参阅我的**home.html**代码。这就是创建列表的方式

home.html

<ion-card>
  <ion-card-content *ngFor="let match of matches ; let i = index">
    <p (click)="spch(i)">{{ match }}</p>
  </ion-card-content>
</ion-card>

以及home.ts

的相关代码

listen(): void {
    console.log('listen action triggered');
    if (this.isListening) {
      this.speech.stopListening();
      this.toggleListenMode();
      return;
    }

    this.toggleListenMode();
    let _this = this;

    this.speech.startListening()
      .subscribe(matches => {
        _this.zone.run(() => {
          _this.matches = matches;
        })
      }, error => console.error(error));

  }

  toggleListenMode():void {
    this.isListening = this.isListening ? false : true;
    console.log('listening mode is now : ' + this.isListening);
  }

  spch(i)
  {
    alert('speech');
    alert(i.match);
    alert(i.matches);
    alert(i);
    console.log('speech');
    console.log(i.match);

  }

alert(i.match)未定义，alert(i.matches)也未定义，alert(i)显示索引号，但我没有获得点击项目的价值。

Answer 1

你这样做是错误的。你已经将i声明为索引，它只包含索引值。尝试传递两个参数：

SELECT MONTHS,
SUM(CASE WHEN A.TYPE = 'A' AND A.NEW = 'Y' THEN 1 ELSE 0 END) AS A_NEW,
SUM(CASE WHEN A.TYPE = 'A' AND A.OLD = 'Y' THEN 1 ELSE 0 END) AS A_OLD,
SUM(CASE WHEN A.TYPE = 'B' AND A.NEW = 'Y' THEN 1 ELSE 0 END) AS B_NEW,
SUM(CASE WHEN A.TYPE = 'B' AND A.OLD = 'Y' THEN 1 ELSE 0 END) AS B_OLD,
SUM(CASE WHEN A.TYPE = 'C' AND A.NEW = 'Y' THEN 1 ELSE 0 END) AS C_NEW,
SUM(CASE WHEN A.TYPE = 'C' AND A.OLD = 'Y' THEN 1 ELSE 0 END) AS C_OLD,
SUM(CASE WHEN A.TYPE = 'D' AND A.NEW = 'Y' THEN 1 ELSE 0 END) AS D_NEW,
SUM(CASE WHEN A.TYPE = 'D' AND A.OLD = 'Y' THEN 1 ELSE 0 END) AS D_OLD  
FROM
MYTABLE A
GROUP BY MONTHS;

并且在ts：

{{1}}

需要console.log列表中单击的项目

1 个答案: