javascript - 回调函数哪儿写错了么-PHP中文网问答

function GetOrderList(tabIndex, dirc,callback) {
    var direction = 1, startNum = 0;
    if (tabIndex == 1) {
        if (handle1 == 1) {
            startNum = startMaxNum1;
            direction = 2;
        }
        else
            startNum = startMinNum1;
    }
    else if (tabIndex == 2) {
        if (handle2 == 1) {
            startNum = startMaxNum3;
            direction = 2;
        } else {
            startNum = startMinNum2;
        }
    } else if (tabIndex == 3) {
        if (handle3 == 1) {
            startNum = startMaxNum3;
            direction = 2;
        }
        else
            startNum = startMinNum3;
    } else {
        if (handle4 == 1) {
            startNum = startMaxNum4;
            direction = 2;
        }
        else
            startNum = startMinNum4;
    }
    if (dirc == 2) {
        direction = 2;
        startNum = 0;
    }
    $.post('/order/GetOrderListByCondition', {
        keyWord: $.trim($("#txtSearch").val()), tabIndex: tabIndex, direction: direction, startNum: startNum
    }, function (data) {
        if (data != null) {
            if (direction == 2) {
                $("#pOrder" + tabIndex).html("");
            }
            if (data.Orders.length >= 1) {
                if (direction == 1) {
                    if (tabIndex == 1) {
                        if (startMaxNum1 == 0) {
                            startMaxNum1 = data.Orders[0].Id;
                        }
                        startMinNum1 = data.Orders[data.Orders.length - 1].Id;
                    } else if (tabIndex == 2) {
                        if (startMaxNum2 == 0) {
                            startMaxNum2 = data.Orders[0].Id;
                        }
                        startMinNum2 = data.Orders[data.Orders.length - 1].Id;
                    } else if (tabIndex == 3) {
                        if (startMaxNum3 == 0) {
                            startMaxNum3 = data.Orders[0].Id;
                        }
                        startMinNum3 = data.Orders[data.Orders.length - 1].Id;
                    } else if (tabIndex == 4) {
                        if (startMaxNum4 == 0) {
                            startMaxNum4 = data.Orders[0].Id;
                        }
                        startMinNum4 = data.Orders[data.Orders.length - 1].Id;
                    }
                } else {
                    if (tabIndex == 1) {
                        if (startMinNum1 == 0) {
                            startMinNum1 = data.Orders[data.Orders.length - 1].Id;
                        }
                        startMaxNum1 = data.Orders[0].Id;
                    } else if (tabIndex == 2) {
                        if (startMinNum2 == 0) {
                            startMinNum2 = data.Orders[data.Orders.length - 1].Id;
                        }
                        startMaxNum2 = data.Orders[0].Id;
                    } else if (tabIndex == 3) {
                        if (startMinNum3 == 0) {
                            startMinNum3 = data.Orders[data.Orders.length - 1].Id;
                        }
                        startMaxNum3 = data.Orders[0].Id;
                    } else if (tabIndex == 4) {
                        if (startMinNum4 == 0) {
                            startMinNum4 = data.Orders[data.Orders.length - 1].Id;
                        }
                        startMaxNum4 = data.Orders[0].Id;
                    }
                }
                $(data.Orders).each(function (i) {
                    var orderstrs = " 
订单号：" + data.Orders[i].OrderCode + "
" + ToJavaScriptDate(data.Orders[i].OrderTime) + "";
                    if (data.OrdersDetail.length >= 1) {
                        var details = Enumerable.From(data.OrdersDetail).Where("x=>x.OrderId==" + data.Orders[i].Id).ToArray();
                        if (details != null && details.length >= 1) {
                            orderstrs += "";
                            $(details).each(function (j) {
                                var img = "";
                                if (details[j].Images != null && details[j].Images != "") {
                                    img = $.trim(details[j].Images).split(" ")[0];
                                }
                                else {
                                    img = "/Images/default_list_100_100.png";
                                }
                                orderstrs += "
" + (details[j].IsGift ? "" : "") + "" + details[j].ProductName + "
￥" + details[j].UnitPrice + "
×" + details[j].Num + "
";
                            });
                        }
                        orderstrs += "";
                    }
                    orderstrs += "
共" + data.Orders[i].ProductCount + "件商品
合计：￥" + data.Orders[i].PayAmount + "
";
                    if (tabIndex == 2) {
                        orderstrs += "";
                    }
                    if (tabIndex != 1) {
                        orderstrs += "";
                    }
                    orderstrs += "";
                    $("#pOrder" + tabIndex).append(orderstrs + "");
                });
            }
        }
        requestf5.style.opacity = 0;
        myScroll.refresh();
    });
    callback();
}

 GetOrderList(tabIndex,1,function () {
                   var activeHight = $(".swiper-slide").eq(swiper.activeIndex).height();
                  var containerHight = parseFloat($("#wrapper").height()) ;
                 if (activeHight <= containerHight)
                     activeHight = containerHight;
                $(".swiper-container").height(activeHight);
            });

哪儿错了么报错 callback is not a function

var activeHight = $(".swiper-slide").eq(swiper.activeIndex).height(); var containerHight = parseFloat($("#wrapper").height()) ; if (activeHight <= containerHight) activeHight = containerHight; $(".swiper-container").height(activeHight); }拿出来写试试，函数传参传的是值

function callback() { var activeHight = $(".swiper-slide").eq(swiper.activeIndex).height(); var containerHight = parseFloat($("#wrapper").height()) ; if (activeHight <= containerHight) activeHight = containerHight; $(".swiper-container").height(activeHight); } GetOrderList(tabIndex,1,callback);

function GetOrderList(tabIndex,dirc,callback){ ... //确保callback是一个函数 if(typeof callback === "function"){ //调用它，既然我们已经确定了它是可调用的 callback(options); } }

全部回复(4)

淡淡烟草味2017-05-19 10:46:22 4楼

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PHP中文网2017-05-19 10:46:22 3楼

把错误信息发出来看看．或者在函数头部把callback log出来看看．

PHP中文网2017-05-19 10:46:22 2楼

理解与使用Javascript中的回调函数

如 @sunshine999 所说，把callback()在外面定义，再将其作为参数传递给GetOrderList。

在执行之前确保回调函数是一个函数
在调用之前检查作为参数被传递的回调函数确实是一个函数，这样的做法是明智的。同时，这也是一个实现条件回调函数的最佳时间。

我这回答最上面贴的那篇文章讲的很详细了。

伊谢尔伦2017-05-19 10:46:22 1楼

试下`
callback = function（）{
var activeHight = $(".swiper-slide").eq(swiper.activeIndex).height();
var containerHight = parseFloat($("#wrapper").height()) ;
if (activeHight <= containerHight)

   activeHight = containerHight;
   $(".swiper-container").height(activeHight);

}
`