Question

有3个复选框，我必须使一个复选框成为必填项。就像所有复选框都未选中一样，应该禁用按钮。请帮我。我该怎么办。

<View style={{ flexDirection: 'row', paddingLeft: 15 }}>
  <View style={{ flex: 1 }}>
    <CheckBox color="#00678f" 
      checked={this.state.notification.isContactByPost}
      onPress={() => this.handleChange('isContactByPost')} 
    />
 </View>
 <View style={{ flex: 1 }}>
   <Text style={{ fontSize: 14 }}>Post</Text>
 </View>
 <View style={{ flex: 1 }}>
   <CheckBox color="#00678f"
     checked={this.state.notification.isContactByEmail}
     onPress={() => this.handleChange('isContactByEmail')} 
   />
 </View>
 <View style={{ flex: 1 }}>
   <Text style={{ fontSize: 14 }}>Email</Text>
 </View>
 <View style={{ flex: 1 }}>
   <CheckBox color="#00678f"
     checked={this.state.notification.isContactBySms}
     onPress={() => this.handleChange('isContactBySms')}
   />
 </View>
 <View style={{ flex: 1 }}>
   <Text style={{ fontSize: 14 }}>SMS</Text>
 </View>
</View>  
<View style={{ marginTop: 50 }}>
 <PrimaryBtn 
   label={'submit'}
   disabled={false}
   onPress={() => this.OnButtonClick(this.state.notification)} 
 />
 </View>
 </View>

谢谢

Answer 1

这是您可以做到的

<PrimaryBtn label={'submit'} disabled={!this.state.notification.isContactByPost && 
    !this.state.notification.isContactByEmail && 
    !this.state.notification.isContactBySms}  onPress={() => 
    this.OnButtonClick(this.state.notification)} />

希望这会有所帮助

Answer 2

render(){
  const {isContactByPost,isContactByEmail,isContactBySms } = this.state.notification; 
  return (
    <PrimaryBtn 
      label={'submit'} 
      disabled={!(isContactByPost || isContactByEmail || isContactBySms)}
      onPress={() => this.OnButtonClick(this.state.notification)} 
    />
  );
}

Answer 3

尝试一下（为了简化起见，我删除了多余的部分）=>

const {isContactByPost, isContactByEmail, isContactBySms} = this.state.notification
const isButtonDisabled = !(isContactByPost || isContactByEmail || isContactBySms)

<PrimaryBtn disabled={isButtonDisabled} /> // don't forget your others props :)

如果在本机中未选中所有复选框，如何禁用按钮

3 个答案: