angular 表单元素，例如checkbox,radio,select等用法

Angular Form Input Type

Form 表单中有很多元素,最普遍的Input,CheckBox,Radio,Select等等。Angular的Form有什么特殊之处呢?

Input

Input的属性有:
name 名字
type 类型(HTML5里有的类型: number,url,email)
ng-model 绑定的数据
required/ng-required 是否必填
ng-minlength 最小长度
ng-maxlength 最大长度
ng-pattern 匹配模式
ng-change 值变化时的回调

例子(输入长度5-15的起始为abc的内容):

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<input type="text" name="a" required ng-model="a" required ng-minlength=5 ng-maxlength=15 ng-pattern="/abc/"/>

Checkbox

Checkbox只有两种值,选中和不选中。

使用方法:

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# HTML5:
 <input type="checkbox" name="checkbox" ng-model="checkbox_value" ng-true-value="AA" ng-false-value="BB"/>
 <span>{{ checkbox_value }}</span>
# JS:
 $scope.checkbox_value = 'AA'; #controller中的初始化值会关系到控件状态（双向绑定）

Radio

与checkbox的区别,一个radio只有一个值

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<input type="radio" name="radio_test" ng-model="radio_test" value="AA"/>AA
<input type="radio" name="radio_test" ng-model="radio_test" value="BB"/>BB<br>
radio选中的值为:<span>{{ radio_test }}</span>

Textarea

与Input类似,但是可以拉伸

Select

使用ng-options遍历数组

x for x in 数组名(普通数组)

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<div ng-init="o=[0,1,2,3]; a=o[1];">
    <select ng-model="select_test" ng-options="x for x in o" ng-change="show()">
        <option value="">可以加这个空值</option>
    </select>select选中的值为: {{ select_test }}
</div>

x.name for x in 数组名(对象数组,有key,value)

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<div ng-init="o2=[{name: 'AA'}, {name: 'BB'}]; a=o2[1];">
    <select ng-model="select_test2" ng-options="x.name for x in o2">
    </select>select选中的值为: {{ select_test2 }}
</div>

x.v as x.name for x in 数组名(选择框显示的是name的值,但选中的value值是v的值)

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<div ng-init="o3=[{name: 'AA', v: '00'}, {name: 'BB', v: '11'}]; a=o3[1].v;">
    <select ng-model="select_test3" ng-options="x.v as x.name for x in o3">
    </select>select选中的值为: {{ select_test3 }}
</div>

x.name group by x.g for x in 数组名(根据g的值来分组)

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<div ng-init="o4=[{name: 'AA', g: '00'},{name: 'BB', g: '11'},{name: 'CC', g: '00'}]; select_test4=o4[1];">
    <select ng-model="select_test4" ng-options="x.name group by x.g for x in o4">
    </select>select选中的值为: name值是{{ select_test4.name }};value是{{ select_test4.g }}
</div>

x.v as x.name group by x.g for x in 数组名(分组了还分别指定显示与值的,根据g分组,v的值是value值,name值是显示的内容)

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<div ng-init="o5=[{name: 'AA', g: '00', v: '='}, {name: 'BB', g: '11', v: '+'},{name: 'CC', g: '00', v: '!'}]; select_test5=o5[1].v;">
    <select ng-model="select_test5" ng-options="x.v as x.name group by x.g for x in o5">
    </select>select选中的值为: {{ select_test5 }}
</div>

v.v as v.name group by v.g for (k, v) in 对象名(o6是一个对象,对象中有两个(key:value)对,可以取对象的值来遍历)

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<div ng-init="o6={a: {name: 'AA', v: '00', g: '=='},b: {name: 'BB', v: '11', g: '=='}}; select_test6=o6.a.v;">
        参数是对象<br>
        显示对象的值里的v的值<br>
        <select ng-model="select_test6" ng-options="v.v as v.name group by v.g for (k, v) in o6">
        </select>select选中的值为: {{ select_test6 }}、
        显示对象的名字<br>
        <select ng-model="select_test7" ng-options="k for (k, v) in o6">
        </select>select选中的值为: {{ select_test7 }}
</div>

Github参考代码

转自我的Github博客