我正在bluestacks android模拟器上测试这个,任何自然响应能力离子按钮似乎都不起作用。我想确保以后此按钮颜色在单击时会发生变化。我用 css 做还是什么?Ionic对此并不清楚。
这是我的按钮
<button ion-button block (click)="addEvent();">Add Event</button>
在 component.ts 文件中:
声明一个变量:
buttonColor: string = '#000'; //Default Color
将您的 HTML 编辑为:-
<button ion-button block (click)="addEvent();" [ngStyle]="{'background-color': buttonColor}">Add Event</button>
在您的函数中执行以下更改:-
addEvent(){
this.buttonColor = '#345465'; //desired Color
/*
YOUR FUNCTION CODE
*/
}
一种更离子的方法是像这样使用颜色属性:
@Component({...})
export class HomePage {
public ionicNamedColor: string = 'primary';
constructor() {}
public toggleNamedColor(): void {
if(this.ionicNamedColor === 'primary') {
this.ionicNamedColor = 'secondary'
} else {
this.ionicNamedColor = 'primary'
}
}
}
在您看来:
<button (click)="toggleNamedColor()" ion-button [color]="ionicNamedColor">Click me!</button>
请注意,颜色应添加到variables.scss
中的命名颜色变量中:
$colors: (
primary: #488aff,
secondary: #32db64,
danger: #f53d3d,
light: #f4f4f4,
dark: #222
);
如果您不想使用命名的颜色变量,则可以像这样更改按钮的背景颜色:
@Component({...})
export class HomePage {
public hexColor: string = '#000000';
constructor() {}
public toggleBackgroundColor(): void {
if(this.hexColor === '#000000') {
this.hexColor = '#dddddd'
} else {
this.hexColor = '#000000'
}
}
}
在您看来:
<button (click)="toggleBackgroundColor()" ion-button [style.background-color]="hexColor">Click me!</button>
请看一下在这个 plunker 中的两种方法。
在我的 HTML 中,我有这个:
<ion-item class="text" *ngFor="let item of question.data.answers; let i = index;">
<button (click)="itemClicked(item, item, i, question.key, question.data)" [class.incorrect]="!item.correct && whatISelected == i" [ngStyle]="item.correct ? {'background-color': buttonColor } : null " > {{ item.answer }}</button>
在我的组件中:
// Declared before constructor component
selectedItem: string
whatISelected: string
buttonColor: string
itemClicked(item, answer, iSelect, key, question) {
// keep selectedItem for each item
this.hasAnswered = true;
if ( answer.correct ) {
this.selectedItem = answer.correct;
this.buttonColor = '#32db64'
} else {
this.whatISelected = iSelect
this.buttonColor = '#32db64'
}
}
<button *ngIf="this._var == true" (click)="this.itemClicked();" class="button1" >My Button 1</button>
<button *ngIf="this._var == false" (click)="this.itemClicked();" class="button2" >My Button 2</button>
public itemClicked(){
if(this._var != false){
this._var == false;
}else{
this._var == true;
}
}