Question

我正在尝试使用map函数生成组件，但是具有索引的onChange函数为我增加了值为什么这给我错误的索引？

当前数组有两个对象

await t
      .typeText()
      .click()
      .expect()
      .eql()
      .then()

//这是我的句柄函数。

{projectState.labels.map((i, k) => (
              <>
                {k === 0 && (
                  <>
                    <Grid container item xs={12}>
                      <Grid item xs={10}>
                        <Autocomplete
                          id="main"
                          ref={(ref) => (autoCompleteRef.current[k] = ref)}
                          name={`label${k + 1}`}
                          options={labelData}
                          getOptionSelected={(option, value) =>
                            option.title === value.title
                          }
                          getOptionLabel={(option) =>
                            option.title ? option.title : ""
                          }
                          classes={{ paper: classes.paper }}
                          ListboxProps={{ style: { maxHeight: "180px" } }}
                          // inputValue={labelData[labelData.length - 1].title}
                          onChange={handleMainLabelFromDropdown(k)}
                          renderInput={(props) => (
                            <TextFieldWithInFocusHelp
                              {...props}
                              required
                              label={`Main Label ${k + 1}`}
                              help="Select the label for the non-defective classification. No sub-labels are allowed for this category."
                            />
                          )}
                        />
                      </Grid>
                      <Grid container item xs={1} alignItems="center">
                        <TooltipStyled
                          placement="right"
                          title="Add new main label."
                        >
                          <IconButton onClick={toggleNewLabelDialogOpen}>
                            <AddCircleIcon color="primary" fontSize="large" />
                          </IconButton>
                        </TooltipStyled>
                        <NewLabelDialog
                          open={newLabelDialogOpen}
                          onClose={toggleNewLabelDialogOpen}
                          onChange={hanldeMainLabelFromDialog(k)}  <--- this is child component. this index returns 1 
                        />
                      </Grid>
                    </Grid>
                  </>
                )}

Answer 1

将您的onChange更改为此：onChange={() => hanldeMainLabelFromDialog(k)}

，您正在招惹您的处理程序。更改为

const hanldeMainLabelFromDialog = index => { }

根据评论进行编辑

如果您想从子元素返回值并传递索引，请将代码更改为

onChange={valueFromChild => hanldeMainLabelFromDialog(valueFromChild, k)}

和

const hanldeMainLabelFromDialog = (value, index) => { }

用地图功能反应循环组件，索引错误

1 个答案:

根据评论进行编辑