[Vue warn]: Error in onLoad hook: "TypeError: uni.startHCE is not a function"

抱歉，我之前的回答有误。在uni-app中，并没有直接提供uni.startHCE()方法来启动HCE服务。我给你提供一个修正后的示例代码，希望能帮到你：

1. 首先，在manifest.json文件中添加nfc功能的权限声明。在"permissions"字段中添加以下代码：

"nfc": {
  "support": true
}

2. 在需要使用NFC的页面中，可以通过uni.getHCEState()方法来检测设备是否支持NFC功能。

// 检测设备是否支持NFC
uni.getHCEState({
  success: function(res) {
    if (res.errCode === 0) {
      console.log('Device supports NFC')

      // 在这里可以进行其他NFC操作，如监听NFC事件等
    } else {
      console.error('Device does not support NFC')
    }
  },
  fail: function(err) {
    console.error('getHCEState fail', err)
  }
})

请注意，具体的NFC功能使用方法可能因设备和系统版本而异。建议你查阅uni-app官方文档或相关开发者文档，以获取更准确的使用指导。

相关问题

[Vue warn]: Error in onLoad hook: "TypeError: this.setData is not a function"

This error message is related to a problem in a Vue component's onLoad hook. Specifically, it suggests that the setData method is not defined or accessible within the current context.

The setData method is typically used in the context of a Vue instance or component to update the data that is being used to render the component. It is possible that there is a problem with the way that the component is structured or initialized that is preventing the setData method from being properly defined or accessed.

To troubleshoot this issue, you may want to review the code for the component and ensure that it is properly structured and initialized. You may also want to check for any other errors or issues that could be causing problems with the component's operation. Additionally, you may want to consult the Vue documentation or seek help from the Vue community to find additional resources and solutions for this issue.

[Vue warn]: Error in mounted hook: "TypeError: this.dom.getContext is not a function"

这个错误是因为在Vue的mounted钩子函数中发生了一个类型错误。具体来说，错误信息提示"TypeError: this.dom.getContext is not a function"。根据引用和引用，这个错误可能是由于使用了错误的方法或属性导致的。

解决这个问题的方法是通过检查代码中使用的方法和属性是否正确。根据引用中提供的解决方法，可能需要使用this.$set来设置数据，或者使用this.$refs来获取DOM元素。此外，也需要确保代码中使用的方法或属性是存在的，并且正确地引用了相应的对象。

另外，根据引用的代码示例，你可能需要使用this.$refs.chart来获取图形容器对象，而不是使用document.getElementById。这样可以确保正确地引用了DOM元素。

总之，通过检查代码中使用的方法和属性，并确保正确地引用相应的对象，可以解决这个错误。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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