我搜索过,但是我找不到熟悉的答案,所以......
我将编写一个类来处理解析方法,如更新,添加,提取和删除.
func updateParse(className:String, whereKey:String, equalTo:String, updateData:Dictionary<String, String>) {
let query = PFQuery(className: className)
query.whereKey(whereKey, equalTo: equalTo)
query.findObjectsInBackgroundWithBlock {(objects, error) -> Void in
if error == nil {
//this will always have one single object
for user in objects! {
//user.count would be always 1
for (key, value) in updateData {
user[key] = value //Cannot assign to immutable expression of type 'AnyObject?!'
}
user.saveInBackground()
}
} else {
print("Fehler beim Update der Klasse \(className) where \(whereKey) = \(equalTo)")
}
} …我正在创建一个包含许多输入字段的巨大表单向导.这些字段是内部的部分,display: none;通过单击按钮,我正在遍历各个部分,最后我正在提交表单.在一个部分中,有另一个表单通过ajax上传图像.要使用ajax,我需要阻止提交表单event.preventDefault();
但这会导致提交父母表单.我怎样才能阻止提交父母表格呢？html结构如下所示:
<form action="" id="wizard">
<section id="sec1"></section>
<section id="sec2">
<form id="ajaxform">
<input type="file" id="ajaxfile">
<input type="submit" value="upload">
</form>
</section>
<section id="sec3"></section>
<button type="button">Back</button>
<button type="button">Next</button>
</form>
jQuery看起来像这样:
$(document).ready(function() {
$('#ajaxform').submit(function(e) {
e.preventDefault();
$.ajax({stuff...});
});
});