类函数式组件 如何 绑定 key

[cha]

如代码，这种写法怎么给 类函数组件绑定 key

  renderItem ({icon, color, title}) {
    return (
      <View className='app' key={title}>
        <View className='app__icon'><Iconfont icon={icon} color={color} /></View>
        <View className='app__title'>{title}</View>
      </View>
    )
  }

  render() {
    const { items , title : appTitle = ''} = this.props
    return (
      <View className='apps'>
        <View className='apps__title'>{appTitle}</View>
        <View className='apps__items'>
          {items.map(c => this.renderItem(c))}
        </View>
      </View>
    )
  }