错误检查无法正确解析查询
问题描述:
所以我有一个名为“类”的解析服务器中的类,我试图在我的程序内部实现一个错误检查查询。但是,当我尝试错误地检查我的查询以搜索类时,程序总是说搜索是成功的,即使该类类型的对象不在查询中,Xcode项目也会正确构建。下面是代码:错误检查无法正确解析查询
@IBAction func searchClass(_ sender: Any) {
let query = PFQuery(className: "Classes")
query.findObjectsInBackground { (success, error) in
if error != nil{
self.createAlert(title: "Error", message: "Cannot find class")
} else {
self.createAlert(
title: "Success", message: "Found the query")
self.classSuccess = true
self.flipCardButton.alpha = 0
UIView.transition(from: self.classQuery, to: self.classRate, duration: 0.5, options: .transitionFlipFromRight)
self.goBackButton.alpha = 1
}
}
这里是我的应用程序内的搜索按钮:
什么可能出问题,使分析查询检查始终打印成功?
答
我想你错过了你的查询中的成功声明。
let query = PFQuery(className: "Classes")
query.findObjectsInBackground { (success, error) in
if error != nil{
print(error ?? "")
self.createAlert(title: "Error", message: "Cannot find class")
}
if success {
self.createAlert(
title: "Success", message: "Found the query")
self.classSuccess = true
self.flipCardButton.alpha = 0
UIView.transition(from: self.classQuery, to: self.classRate, duration: 0.5, options: .transitionFlipFromRight)
self.goBackButton.alpha = 1
} else {
self.createAlert(title: "Error", message: "Cannot find class")
}
}