Question

Hi how to avoid the ok and cancel button in ion-options?

I need an output as the below image after clicking the ion-option.

I have tried all the options as per http://ionicframework.com/docs/v2/api/components/select/Select/.

Yet I am not able to achieve this ui.

Even after typing interface="action-sheet" I am not able to achieve the wanted look.

Where can I find a demo or any help to get this view?

Answer 1

这个问题实际上是我自己需要的东西，我知道有些人需要它一段时间。所以我希望这会有所帮助..

选项1：包装的超级组件

首先，我们要创建一个名为select-alertless的组件。这是包含选项的HTML：

<ion-select [(ngModel)]="model" #select>
    <ion-option *ngFor="let option options" [value]="option.id">{{option.name}}</ion-option>
</ion-select>

使用视图子项链接非常简单。

现在scss隐藏ok / cancel按钮：

.select-alertless{
    .alert-button-group{
        display:none;
        }
    }

在html中的select上查找set的实际组件类。查找选项并在点击上设置发射。因此，每当有人点击其中一个选项时。单击后，打开功能就可以解除警报。

 @Component({
    templateUrl: 'select-alertless.html',
    selector: 'select-alertless',
})
export class select_alertless {
    // the options that are displayed
    @Input('options') public options: any[];
    @Input('model') public model: any;

    // the event that is to be emitted when changes occures
    @Output('change') public change: EventEmitter<any> = new EventEmitter<any>();

    // The sets here capture events and emit the data to change when its needed. It also switched the open function for our own open function so then the viewcontroller can be closed.
    @ViewChild('select') public set ex(select: any | undefined) {
        if (select === undefined) return;
        select.open = this.open;
        if (select._options === undefined) {
            Object.defineProperty(select, '_options', {
                set: (val) => {
                    select['__options'] = val;
                    val.forEach(option => option.ionSelect.subscribe(d => {
                        this.change.emit(d);
                        this.model = d;

                        select.overlay.dismiss();
                    }));
                },
                get: function () { return select['__options'] }
            })
        }
    }
    open() {
        if ((<any>this)._disabled) {
            return;
        }

        console.debug('select, open alert');

        // the user may have assigned some options specifically for the alert
        const selectOptions = deepCopy((<any>this).selectOptions);

        // make sure their buttons array is removed from the options
        // and we create a new array for the alert's two buttons
        selectOptions.buttons = [{
            text: (<any>this).cancelText,
            role: 'cancel',
            handler: () => {
                (<any>this).ionCancel.emit(null);
            }
        }];

        // if the selectOptions didn't provide a title then use the label's text
        if (!selectOptions.title && (<any>this)._item) {
            selectOptions.title = (<any>this)._item.getLabelText();
        }

        let options = (<any>this)._options.toArray();


        // default to use the alert interface
        (<any>this).interface = 'alert';

        // user cannot provide inputs from selectOptions
        // alert inputs must be created by ionic from ion-options
        selectOptions.inputs = (<any>this)._options.map(input => {
            return {
                type: ((<any>this)._multi ? 'checkbox' : 'radio'),
                label: input.text,
                value: input.value,
                checked: input.selected,
                disabled: input.disabled,
                handler: (selectedOption: any) => {
                    // Only emit the select event if it is being checked
                    // For multi selects this won't emit when unchecking
                    if (selectedOption.checked) {
                        input.ionSelect.emit(input.value);
                    }
                }
            };
        });

        var selectCssClass = 'select-alert';

        // create the alert instance from our built up selectOptions
        (<any>this).overlay = new Alert((<any>(<any>this))._app, selectOptions);

        if ((<any>this)._multi) {
            // use checkboxes
            selectCssClass += ' multiple-select-alert select-alertless';
        } else {
            // use radio buttons
            selectCssClass += ' single-select-alert select-alertless';
        }

        // If the user passed a cssClass for the select, add it
        selectCssClass += selectOptions.cssClass ? ' ' + selectOptions.cssClass : '';
        (<any>this).overlay.setCssClass(selectCssClass);

        (<any>this).overlay.addButton({
            text: (<any>this).okText,
            handler: (selectedValues: any) => {
                (<any>this).onChange(selectedValues);
                (<any>this).ionChange.emit(selectedValues);
            }
        });


        (<any>this).overlay.present(selectOptions);

        (<any>this)._isOpen = true;
        (<any>this).overlay.onDidDismiss(() => {
            (<any>this)._isOpen = false;
        });
    }
}

如果select中创建的警报是公共的而不是局部变量，那么这个答案会短得多。

将此添加到您的应用模块，您可以自由使用它。这是一个例子：

<ion-item>
            <ion-label>stuff</ion-label>
            <select-alertless [model]="data" item-content [options]="options" (change)="data = $event"></select-alertless>
</ion-item>

您可以添加更多传递给离子选择的输入以进行更多配置。

选项2：扩展选择自己

这将是一个更好的解决方案，因为它让您可以选择仅像离子选择一样编写组件select-alertless

import { AfterContentInit, Component, ContentChildren, ElementRef, EventEmitter, forwardRef, Input, HostListener, OnDestroy, Optional, Output, Renderer, QueryList, ViewEncapsulation } from '@angular/core';
import { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms';

import { ActionSheet, Alert, App, Config, Form, Ion, Item, NavController, Option, ViewController } from 'ionic-angular';
import { isBlank, isCheckedProperty, isTrueProperty, deepCopy } from 'ionic-angular/util/util';
import { Select as ImportSelect } from 'ionic-angular/components/select/select';


export class TempSelect extends ImportSelect {
    static decorators = undefined;
    // static propDecorators = undefined;
}

export const SELECT_VALUE_ACCESSOR: any = {
    provide: NG_VALUE_ACCESSOR,
    useExisting: forwardRef(() => Select),
    multi: true
};

@Component({
    selector: 'select-alertless',
    styles: ['.select-alertless .alert-button-group{display:none}'],
    template:
'<div *ngIf="!_text" class="select-placeholder select-text">{{placeholder}}</div>' +
'<div *ngIf="_text" class="select-text">{{selectedText || _text}}</div>' +
'<div class="select-icon">' +
'<div class="select-icon-inner"></div>' +
'</div>' +
'<button aria-haspopup="true" ' +
'[id]="id" ' +
'ion-button="item-cover" ' +
'[attr.aria-labelledby]="_labelId" ' +
'[attr.aria-disabled]="_disabled" ' +
'class="item-cover">' +
'</button>',
host: {
        '[class.select-disabled]': '_disabled'
    },
    providers: [SELECT_VALUE_ACCESSOR],
    encapsulation: ViewEncapsulation.None,
})
export class Select extends TempSelect implements AfterContentInit, ControlValueAccessor, OnDestroy {
    public overlay: Alert;
    private __options: any;
    constructor(
        _app: App,
        _form: Form,
        config: Config,
        elementRef: ElementRef,
        renderer: Renderer,
        @Optional() public _item: Item,
        @Optional() _nav: NavController
    ) {
        super(_app, _form, config, elementRef, renderer, _item, _nav);
        this.setElementClass(`${this._componentName}-${this._mode}`, false);
    }
public set _options(val) {
    this.__options = val;
    if (!this._multi) {
        this.__options.forEach(option => {
            option.ionSelect.subscribe(selectedValues => {
                this.onChange(selectedValues);
                this.ionChange.emit(selectedValues);
                this._isOpen = false;
                this.overlay.dismiss();
            });
        });
    }
}
public get _options() {
    return this.__options;
}
open() {
    if (this._disabled) {
        return;
    }

    // the user may have assigned some options specifically for the alert
    const selectOptions = deepCopy(this.selectOptions);

    // make sure their buttons array is removed from the options
    // and we create a new array for the alert's two buttons
    selectOptions.buttons = [{
        text: this.cancelText,
        role: 'cancel',
        handler: () => {
            this.ionCancel.emit(null);
        }
    }];

    // if the selectOptions didn't provide a title then use the label's text
    if (!selectOptions.title && this._item) {
        selectOptions.title = this._item.getLabelText();
    }

    let options = this._options.toArray();


    // default to use the alert interface
    this.interface = 'alert';

    // user cannot provide inputs from selectOptions
    // alert inputs must be created by ionic from ion-options
    selectOptions.inputs = this._options.map(input => {
        return {
            type: (this._multi ? 'checkbox' : 'radio'),
            label: input.text,
            value: input.value,
            checked: input.selected,
            disabled: input.disabled,
            handler: (selectedOption: any) => {
                // Only emit the select event if it is being checked
                // For multi selects this won't emit when unchecking
                if (selectedOption.checked) {
                    input.ionSelect.emit(input.value);
                }
            }
        };
    });

    var selectCssClass = 'select-alert';

    // create the alert instance from our built up selectOptions
    this.overlay = new Alert((<any>this)._app, selectOptions);

    if (this._multi) {
        // use checkboxes
        selectCssClass += ' multiple-select-alert';
    } else {
        // use radio buttons
        selectCssClass += ' single-select-alert select-alertless';
    }

    // If the user passed a cssClass for the select, add it
    selectCssClass += selectOptions.cssClass ? ' ' + selectOptions.cssClass : '';
    this.overlay.setCssClass(selectCssClass);

    this.overlay.addButton({
        text: this.okText,
        handler: (selectedValues: any) => {
            this.onChange(selectedValues);
            this.ionChange.emit(selectedValues);
        }
    });


    this.overlay.present(selectOptions);

    this._isOpen = true;
    this.overlay.onDidDismiss(() => {
        this._isOpen = false;
    });
}

}

使用类似：

<select-alertless item-content  [(ngModel)]="data"><ion-option></ion-option></select-alertless>

基本上像普通选择一样使用

有关如何使用它的更多信息和示例项目，请参阅此github： https://github.com/misha130/ionic2-select-nobuttons

How to avoid ok/cancel button in ion-option/ion-select

1 个答案: