Angular17之Angular自定义指令详解(2)

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { DirectiveTest01Directive } from './test/directive-test01.directive';
import { SharedModule } from '../shared/shared.module';
import { DirectiveTest02Directive } from './test/directive-test02.directive';
@NgModule({
 imports: [
 CommonModule
 ],
 declarations: [
 DirectiveTest01Directive,
 DirectiveTest02Directive],
 exports: [
 DirectiveTest01Directive,
 DirectiveTest02Directive
 ]
})
export class DirectiveModule { }

    4.1.4 将自定义指令模块导入到需要用到指定指令的组件所在的模块中

      技巧01:自定义指令一般会被多次用到,所以一般会将自定义指令模块导入到共享模块在从共享模块导出,这样其它模块只需要导入共享模块就可以啦

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { RouterModule } from '@angular/router';
import { 
 MdToolbarModule,
 MdSidenavModule,
 MdIconModule,
 MdButtonModule,
 MdCardModule,
 MdInputModule,
 MdRadioModule,
 MdRadioButton
 } from '@angular/material';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { HttpModule } from '@angular/http';
import { DirectiveModule } from '../directive/directive.module'; 
@NgModule({
 imports: [
 CommonModule,
 RouterModule,
 FormsModule,
 ReactiveFormsModule,
 HttpModule,
 MdToolbarModule,
 MdSidenavModule,
 MdIconModule,
 MdButtonModule,
 MdCardModule,
 MdInputModule,
 DirectiveModule,
 MdRadioModule
 ],
 declarations: [],
 exports: [
 CommonModule,
 RouterModule,
 FormsModule,
 ReactiveFormsModule,
 HttpModule,
 MdToolbarModule,
 MdSidenavModule,
 MdIconModule,
 MdButtonModule,
 MdCardModule,
 MdInputModule,
 DirectiveModule,
 MdRadioButton
 ]
})
export class SharedModule { }

    4.1.5 在组件中使用自定组件对应的选择器即可

      自定义指令的选择器是由@Directive装饰器的selector元数据指定的

 在元素中直接标注自定义指令的选择器就行啦  

    

<div class="panel panel-primary">
 <div class="panel panel-heading">实现自定义属性指令</div>
 <div class="panel-body">
 <button md-raised-button appDirectiveTest02>实现自定义指令的按钮</button>
 <br /><br />
 <button md-raised-button>未实现自定以指令的按钮</button>
 </div>
 <div class="panel-footer">2018-1-20 22:47:06</div>
</div>
      

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