在Ionic2中从模态检索数据

Question

我有一个页面有一个按钮，一旦点击就创建一个模式。

现在我想在我的模态中设置一个变量，并在模态关闭后使用该按钮将其传递回页面。

这是我尝试过（我删除了样板代码）：在

modal.ts

myVar:string; 
    constructor(private navCtrl: NavController, private viewCtrl: ViewController) { 
    this.myVar = "Hello"; 

} 
// when modal is being closed 
onCancel(){ 
     this.viewCtrl.dismiss(this.myVar); 
    } 

pageWithButton.ts

varFromModal:string; 
    constructor(private navCtrl: NavController, private viewCtrl: ViewController) {} 

    // I get this error here: Error TS1068: Unexpected token. A constructor, method, accessor, or property was expected. 
    this.viewCtrl.onDismiss(data => { 
      this.varFromModal = data; 
     }); 

Answer 1

你不能写代码直接您的课程：

class YourClassName { 

    varFromModal:string; 
    constructor(private navCtrl: NavController, private viewCtrl: ViewController) {} 

    // YOU CANT WRITE CODE HERE !! 
    // PUT IT IN A FUNCTION OR CONSTRUCTOR OR WHEREVER .. 
    this.viewCtrl.onDismiss(data => { 
     this.varFromModal = data; 
    }); 
}