致命错误：索引超出范围搜索项目
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【中文标题】致命错误：索引超出范围搜索项目【英文标题】：fatal error: Index out of range search for an item 【发布时间】：2017-12-11 16:54:37 【问题描述】：我有控制段和 UITableview。表会根据所选的段或执行的搜索重新加载。控制段工作正常，但搜索不工作。当我尝试在栏中输入任何内容时，它只会重新加载，当我单击单元格时它会崩溃。有人可以在这里帮助我吗？非常感谢你
var auxiliar: [Shops]? = [Shops]()
var searchActive: Bool = false
// shops category
var restuarnt = [Shops]()
var coffee = [Shops]()
var pharmacy = [Shops]()
var supermarket = [Shops]()
var home = [Shops]()
var clothes = [Shops]()
var allShops = [Shops]()
var shops = [Shops]()
var selectedIndex = 0
s.valueChange = index in
if index == 0
self.selectedIndex = 0
self.tableView.reloadData()
if index == 1
self.selectedIndex = 1
self.tableView.reloadData()
if index == 2
self.selectedIndex = 2
if index == 3
self.selectedIndex = 3
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
if selectedIndex == 0
return allShops.count
if selectedIndex == 1
return self.coffee.count
if selectedIndex == 2
return self.restuarnt.count
if selectedIndex == 3
return self.pharmacy.count
if searchActive
return auxiliar!.count
else
return allShops.count
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
if selectedIndex == 0
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! ShopTableViewCell
let entry = shops[indexPath.row]
cell.shopImage.hnk_setImage(from: URL(string: entry.Logo))
cell.shopName.text = entry.shopname
cell.star.rating = Double(entry.rate)
cell.time.text = entry.time
cell.backgroundColor = UIColor(white: 1 , alpha : 0.5)
return cell
if selectedIndex == 1
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! ShopTableViewCell
let entry = coffee[indexPath.row]
cell.shopImage.hnk_setImage(from: URL(string: entry.Logo))
cell.shopName.text = entry.shopname
cell.star.rating = Double(entry.rate)
cell.time.text = entry.time
cell.backgroundColor = UIColor(white: 1 , alpha : 0.5)
return cell
if selectedIndex == 2
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! ShopTableViewCell
let entry = restuarnt[indexPath.row]
cell.shopImage.hnk_setImage(from: URL(string: entry.Logo))
cell.shopName.text = entry.shopname
cell.star.rating = Double(entry.rate)
cell.time.text = entry.time
cell.backgroundColor = UIColor(white: 1 , alpha : 0.5)
return cell
if selectedIndex == 3
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! ShopTableViewCell
let entry = pharmacy[indexPath.row]
cell.shopImage.hnk_setImage(from: URL(string: entry.Logo))
cell.shopName.text = entry.shopname
cell.star.rating = Double(entry.rate)
cell.time.text = entry.time
cell.backgroundColor = UIColor(white: 1 , alpha : 0.5)
return cell
if searchActive
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! ShopTableViewCell
let entry1 = auxiliar?[indexPath.row]
cell.shopImage.hnk_setImage(from: URL(string: (entry1?.Logo)!))
cell.shopName.text = entry1?.shopname
cell.backgroundColor = UIColor(white: 1 , alpha : 0.5)
cell.time.text = entry1?.time
cell.star.rating = Double((entry1?.rate)!)
return cell
else
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! ShopTableViewCell
let entry = shops[indexPath.row]
cell.shopImage.hnk_setImage(from: URL(string: entry.Logo))
cell.shopName.text = entry.shopname
cell.star.rating = Double(entry.rate)
cell.time.text = entry.time
cell.backgroundColor = UIColor(white: 1 , alpha : 0.5)
return cell
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)
tableView.deselectRow(at: indexPath, animated: true)
if selectedIndex == 1
let meal1 = coffee[indexPath.row]
guard (coffee.count) > indexPath.row else
print("Index out of range")
return
let storyboard = UIStoryboard(name: "Main", bundle: nil)
var viewController = storyboard.instantiateViewController(withIdentifier: "viewControllerIdentifer") as! MealsDetailsController
viewController.passedValue = (meal1.familiy_id)
viewController.name = (meal1.shopname)
print("\(meal1.familiy_id) im the search ")
view.animateRandom()
self.present(viewController, animated: true , completion: nil)
if selectedIndex == 0
let meal1 = shops[indexPath.row]
guard (shops.count) > indexPath.row else
print("Index out of range")
return
let storyboard = UIStoryboard(name: "Main", bundle: nil)
var viewController = storyboard.instantiateViewController(withIdentifier: "viewControllerIdentifer") as! MealsDetailsController
viewController.passedValue = (meal1.familiy_id)
viewController.name = (meal1.shopname)
print("\(meal1.familiy_id) im the search ")
view.animateRandom()
self.present(viewController, animated: true , completion: nil)
if selectedIndex == 2
let meal1 = restuarnt[indexPath.row]
guard (restuarnt.count) > indexPath.row else
print("Index out of range")
return
let storyboard = UIStoryboard(name: "Main", bundle: nil)
var viewController = storyboard.instantiateViewController(withIdentifier: "viewControllerIdentifer") as! MealsDetailsController
viewController.passedValue = (meal1.familiy_id)
viewController.name = (meal1.shopname)
print("\(meal1.familiy_id) im the search ")
view.animateRandom()
self.present(viewController, animated: true , completion: nil)
if selectedIndex == 3
let meal1 = pharmacy[indexPath.row]
guard (pharmacy.count) > indexPath.row else
print("Index out of range")
return
let storyboard = UIStoryboard(name: "Main", bundle: nil)
var viewController = storyboard.instantiateViewController(withIdentifier: "viewControllerIdentifer") as! MealsDetailsController
viewController.passedValue = (meal1.familiy_id)
viewController.name = (meal1.shopname)
print("\(meal1.familiy_id) im the search ")
view.animateRandom()
self.present(viewController, animated: true , completion: nil)
if searchActive
let meal1 = auxiliar?[indexPath.row]
guard (auxiliar?.count)! > indexPath.row else
print("Index out of range")
return
let storyboard = UIStoryboard(name: "Main", bundle: nil)
var viewController = storyboard.instantiateViewController(withIdentifier: "viewControllerIdentifer") as! MealsDetailsController
viewController.passedValue = (meal1?.familiy_id)!
viewController.name = (meal1?.shopname)!
print("\(meal1?.familiy_id) im the search ")
view.animateRandom()
self.present(viewController, animated: true , completion: nil)
else
let meal = shops[indexPath.row]
guard shops.count > indexPath.row else
print("Index out of range")
return
let storyboard = UIStoryboard(name: "Main", bundle: nil)
var viewController = storyboard.instantiateViewController(withIdentifier: "viewControllerIdentifer") as! MealsDetailsController
viewController.passedValue = meal.familiy_id
viewController.name = meal.shopname
view.animateRandom()
self.present(viewController, animated: true , completion: nil)
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String)
auxiliar = shops.filter $0.shopname.range(of: searchText, options: .caseInsensitive, range: nil, locale: nil) != nil
if searchText == "" || searchBar.text == nil
auxiliar = shops
tableView.reloadData()
崩溃是由这一行引起的let meal1 = auxiliar?[indexPath.row]
【问题讨论】：
哪行代码抛出错误？请提供Minimal, Complete and Verifiable example。不相关，但不是没有else 分支的单独的if 子句，您应该使用switch 语句来使您的代码更具可读性。
let meal1 = auxiliar?[indexPath.row]
【参考方案1】：
你应该交换以下两个语句：
let meal1 = auxiliar?[indexPath.row]
guard (auxiliar?.count)! > indexPath.row else
print("Index out of range")
return
尝试下标是没有意义的（如果auxiliar.count <= indexPath.row 会导致异常），然后检查下标是否真的安全。
应该是：
guard auxiliar.count > indexPath.row else
print("Index out of range")
return
let meal1 = auxiliar[indexPath.row]
此外，var auxiliar: [Shops]? = [Shops]() 毫无意义。如果您为auxiliar 提供默认值，为什么要将其定义为Optional？只需简单地将auxiliar 声明为var auxiliar = [Shops]() 的非可选。
此外，您应该重新访问您的 tableView(:numberOfRowsInSection:) 实现，因为您正在检查两个不同的变量以确定要返回的值，如果您不重置 selectedIndex，这很容易导致问题，因为在这种情况下，函数永远无法到达if searchActive 部分。
您还应该重构代码并使用 switch 语句，而不是多个具有不同条件且没有 else 分支的 if 语句。
【讨论】：
感谢您的回答！我确实修复了它，它现在没有崩溃，但搜索结果不正确 我在我的问题中添加了textDidChange，请查看我是如何编码的以上是关于致命错误：索引超出范围搜索项目的主要内容，如果未能解决你的问题，请参考以下文章
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