[英]Codeigniter infinite scroll weird results
我試圖在我的項目中實現無限滾動器。 我首先在一個新項目上進行了嘗試,但效果很好,但是當我嘗試在其他項目中實現它時,卻得到了奇怪的結果。
為了測試它,我將限制設置為1,因此應該每次都添加1個項目,但不是。 它總是使物品數量加倍,並給出奇怪的順序。 因此,我在項目的計數/偏移量上添加了回顯,得到了類似的結果。 (數字是回聲偏移量,每行都是滾動,應該僅添加一項):
第一:1(= 1個項目)
秒:1-2-2(= 3個項目)
第三名:1-2-4-4-2-4-4(= 7件)
第四位:1-2-4-8-8-8-4-8-82-4-8-8-8-8(= 15件)
依此類推...同樣,相同的數字始終是相同的項目。 所以我有很多雙重項目。 我還嘗試過警報(count($ items)); 結果之前,foreach只給1。
這是Ajax的代碼:
var reachedEnd = false;
$(window).scroll(function() {
if ($(window).scrollTop() == $(document).height() - $(window).height()) {
setTimeout(function() {
lastPostFunc();
}, 1000);
}
});
function lastPostFunc() {
var trs = $('.sresult-row');
var count = trs.length; //offset
if (reachedEnd == false) {
alert("test"); //I only get 1 alert after each scroll
$.ajax({
url: "http://localhost/ci/index.php/search/ajax_searchJob/" + count,
async: false,
dataType: "html",
success: function(data) {
if (data != "End")
$('.result-bd').append(data);
else
reachedEnd = true;
}
});
}
}
只是我的控制器的一小部分:
public function ajax_searchJob($offset = null) {
if ($this->job_model->searchJobUnique($where, 1, $offset)) {
$jobs = $this->job_model->searchJobUnique($where, 1, $offset);
echo $offset; //This gives the result I've said before
...
$this->load->view("default/search-job-result-ajax", $data);
} else {
echo 'End';
}
}
我的模型,以防有人要看:
public function searchJobUnique($where, $limit = 1, $offset = 0)
{
$sql = "SELECT *,job.id as id, job.country as country, job.province as province, job.city as city,
job.employment_length as employment_length, job.employment_type employment_type,
u.username as company_name, job.company_id as company_id, u.description as description,
job.is_visa_assistance, job.is_visa_assistance,
ms.employment_type as msjob_employment_type,
ms.employment_length as msjob_employment_length,
ms.is_visa_assistance as msjob_is_visa_assistance,
ms.is_housing_assistance as msjob_is_housing_assistance,
ms.language_level as msjob_language_level,
ms.industry_position as msjob_industry_position
FROM job
LEFT JOIN user as u on job.company_id=u.uid
LEFT JOIN job_industry_position as jip on job.id=jip.job_id
LEFT JOIN match_score as ms on job.id=ms.job_id".$where." ORDER BY job.post_date DESC
limit " . $limit . " offset " . $offset;
$r = $this->db->query($sql);
if ($r->num_rows > 0) {
return $r->result_array();
} else {
return false;
}
}
我真的很想解決這個問題。 我使用了與我的testproject中使用的代碼完全相同的代碼。
任何人?
查看您的JS,我認為$('.result-bd')
是$('.sresult-row')
,可能無法准確獲取行數是因為附加文件尚未加載到DOM上,因此,您的ajax req將錯誤的值替換為ur控制器,我建議您確保在繼續分配任何值之前先加載$('.sresult-row')
您的count
,即您可以在代碼中嘗試:
var reachedEnd = false;
var count = 1; //give your offset a default value first
$(window).scroll(function() {
if ($(window).scrollTop() == $(document).height() - $(window).height()) {
$.when(lastPostFunc()).then(function(){ //make sure that the result items gets appended
var trs = $('.sresult-row'); //assigning new instances of sr-row everytime
setTimeout(function() { //provide a short lag time just to make sure that .result-row is already existing in the dom
count = parseInt(trs.length, 10); //assigns a new value for your offset
}, 500);
});
}
});
function lastPostFunc() {
if (reachedEnd == false) {
$.ajax({
url: "http://localhost/ci/index.php/search/ajax_searchJob/" + count,
async: false,
dataType: "html",
success: function(data) {
if (data != "End")
$('.result-bd').append(data);
else
reachedEnd = true;
}
});
}
}
尚未嘗試過是否奏效,希望能幫上忙,加油!
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