掩盖ion-input
元素的最佳方法是什么?例如电话号码...是这样的:
<ion-input type="tel" placeholder="celular" name="celular"
[(ngModel)]="phone_number" required
mask="(**)*****-****" ></ion-input>
最佳答案
3个步骤:
==> 1-创建指令。
==> 2-通过放置在声明数组中导入到主模块。
==> 3-使用html文件中的指令。
第1步
import { Directive, Attribute } from '@angular/core';
import { NgModel } from '@angular/forms';
@Directive({
selector: '[mask]',
host: {
'(keyup)': 'onInputChange($event)'
},
providers: [NgModel]
})
export class Mask {
maskPattern: string;
placeHolderCounts: number;
dividers: string[];
modelValue: string;
viewValue: string;
constructor(
public model: NgModel,
@Attribute("mask") maskPattern: string
) {
this.dividers = maskPattern.replace(/\*/g, "").split("");
this.dividers.push(" ");
this.generatePattern(maskPattern);
}
onInputChange(event) {
this.modelValue = this.getModelValue(event);
let stringToFormat = this.modelValue;
if (stringToFormat.length < 10) {
stringToFormat = this.padString(stringToFormat);
}
this.viewValue = this.format(stringToFormat);
this.writeValue(event.target, this.viewValue);
}
writeValue(target, value) {
return target.value = value;
}
generatePattern(patternString) {
this.placeHolderCounts = (patternString.match(/\*/g) || []).length;
for (let i = 0; i < this.placeHolderCounts; i++) {
patternString = patternString.replace('*', "{" + i + "}");
}
this.maskPattern = patternString;
}
format(s) {
var formattedString = this.maskPattern;
for (let i = 0; i < this.placeHolderCounts; i++) {
formattedString = formattedString.replace("{" + i + "}", s.charAt(i));
}
return formattedString;
}
padString(s) {
var pad = " ";
return (s + pad).substring(0, pad.length);
}
getModelValue(event) {
var modelValue = event.target.value;
for (var i = 0; i < this.dividers.length; i++) {
while (modelValue.indexOf(this.dividers[i]) > -1) {
modelValue = modelValue.replace(this.dividers[i], "");
}
}
return modelValue;
}
}
第2步
import { Mask } from'./Mask';
@NgModule({
declarations: [
MyApp,
HomePage,
Mask
],
第三步
<form>
<ion-list>
<ion-item>
<ion-input type="text" mask="(**)****-****"></ion-input>
</ion-item>
</ion-list>
<button ion-button block type="submit">Save</button>
</form>
关于angular - ionic 3输入口罩,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/45198560/