##
#### 解释：按钮
#### 属性说明：
|属性名 | 类型 | 必填 | 默认值 |说明 |
|---|---|---|---|---|
|button-size |String |否|中按钮|按钮大小类型，有大、中、小，分别为large,middle,small|
|button-text |String |否|-|按钮文案|
|button-color |String |否|firstly|按钮颜色，有主、辅、底部蓝色按钮，分别为firstly,secondly,thirdly|
|defined-bg-color |String |否|-|自定义按钮背景颜色|
|button-disabled |Boolean |false|-|按钮置灰|
|button-link |Boolean |否|false|是否为跳转链接|
|button-icon |String |否|-|图标链接|

#### 示例
json:
```
    {
        "usingComponents": {
            "zw-button": "yourpath/components/Button/src/index"
        }
    }
```

swan:
```
    <view>
        <zw-button
            button-size="{{buttonSize}}"
            button-color="{{buttonColor}}"
            button-text="{{buttonText}}"
            button-disabled="{{buttonDisabled}}"
            button-link="{{buttonLink}}"
            button-icon="{{buttonIcon}}"
            defined-bg-color="{{definedBgColor}}">
        </zw-button>
    </view>
```

js:
```
    /* eslint-disable babel/new-cap */
Page({
/* eslint-enable babel/new-cap */
        data: {
            buttonSize: 'small',
            buttonText: '按钮1',
            buttonColor: 'thirdly',
            buttonDisabled: false,
            buttonLink: false,
            buttonIcon: ''
        },
        onLoad(options) {

        }
    })
```