How to cancel the return key in uniapp

In mobile development, canceling the return key is a common operation. In uniapp, canceling the return key is very simple. Just listen to the return key event and use uni.navigateBackAPI to prevent the return operation.

Uniapp implements the cancellation of the return key by listening to the global UniApp's life cycle hook onBackPress method. This method is automatically called when the user clicks the return key on the Android phone.

Here's how to use the onBackPress method to cancel the return key:

1. In the page.vue file, add the following code:

export default {
  onBackPress() {
    // 阻止返回操作
    return false;
  }
}

In this code , we override the onBackPress method and prevent the return operation by returning false.

2. If you want to cancel the return key globally, add the following code in the App.vue file:

export default {
  onLaunch() {
    uni.onBackPress(function() {
      // 阻止返回操作
      return false;
    });
  }
}

In this code, we use uni. onBackPress method to listen to the return key event globally and prevent the return operation by returning false.

Through the above code, we can simply cancel the return key operation. In addition to preventing the return operation, we can also add other logic to the onBackPress method, such as popping up a confirmation box and other operations.

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