我想做的是在输入名字和姓氏时显示全名。
这有效：
<h1 [hidden]="!firstName || !lastName">Hello {{lastName + ', ' + firstName}}!</h1>
这不起作用（调用类中定义的方法的正确方法是什么？）：
<!--h1 [hidden]="!firstName || !lastName">Hello {{fullName()}}!</h1!-->
这也不起作用：
<button ng-click="alertFullName()">show full name</button>
以下是文件：
索引.html：
<!DOCTYPE html>
<html>
<head>
<title>Angular 2 QuickStart</title>
<!-- 1. Load libraries -->
<script src="https://rawgithub.com/systemjs/systemjs/0.19.6/dist/system.js"></script>
<script src="https://code.angularjs.org/tools/typescript.js"></script>
<script src="https://code.angularjs.org/2.0.0-beta.0/angular2-polyfills.js"></script>
<script src="https://code.angularjs.org/2.0.0-beta.0/Rx.js"></script>
<script src="https://code.angularjs.org/2.0.0-beta.0/angular2.dev.js"></script>
<!-- 2. Configure SystemJS -->
<script>
System.config({
transpiler: 'typescript',
typescriptOptions: { emitDecoratorMetadata: true },
packages: {'src': {defaultExtension: 'ts'}}
});
</script>
<!-- 3. Bootstrap -->
<script>
System.import('angular2/platform/browser').then(function(ng){
System.import('src/hello_world').then(function(src) {
ng.bootstrap(src.HelloWorld);
});
});
</script>
</head>
<!-- 4. Display the application -->
<body>
<hello-world>Loading...</hello-world>
</body>
</html>
src/hello_world.html：
<label>Name:</label>
<input type="text" [(ngModel)]="firstName" placeholder="Enter first name here">
<input type="text" [(ngModel)]="lastName" placeholder="Enter last name here">
<hr>
<h1 [hidden]="!firstName || !lastName">Hello {{lastName + ', ' + firstName}}!</h1>
<!--h1 [hidden]="!firstName || !lastName">Hello {{fullName()}}!</h1!-->
<button ng-click="alertFullName()">show full name</button>
src/hello_world.ts：
import {Component} from 'angular2/core';
@Component({
// Declare the tag name in index.html to where the component attaches
selector: 'hello-world',
// Location of the template for this component
templateUrl: 'src/hello_world.html'
})
export class HelloWorld {
firstName: string = '';
lastName: string = '';
function fullName(): string {
return firstName + ', ' + lastName;
}
function alertFullName() {
alert(firstName + ', ' + lastName);
}
}
