Ios UITableView deleteRows未更新索引路径导致崩溃索引超出范围
在API调用成功从列表中删除项时调用以下代码Ios UITableView deleteRows未更新索引路径导致崩溃索引超出范围,ios,swift,uitableview,tableview,Ios,Swift,Uitableview,Tableview,在API调用成功从列表中删除项时调用以下代码 self?.myWishlistArry?.remove(at: indexPath.row) self?.myWishListTableView.deleteRows(at: [indexPath], with: .right) 下面是删除按钮的结束 myWishlistCell.closureForRemoveBtn = { [weak self] (productId, storeid) in
self?.myWishlistArry?.remove(at: indexPath.row)
self?.myWishListTableView.deleteRows(at: [indexPath], with: .right)
下面是删除按钮的结束
myWishlistCell.closureForRemoveBtn = {
[weak self]
(productId, storeid) in
self?.callAlertViewForRemoved(productid: productId, storeId: storeid, indexPath: indexPath)
}
以下是显示警报以供用户确认的代码
func callAlertViewForRemoved(productid :String, storeId: String, indexPath: IndexPath) {
let alertController = UIAlertController(title: AppLocalString.ITEM_NOT_AVAILABLE_TEXT.localized(), message: AppLocalString.MY_EXLUDE_TEXT.localized(), preferredStyle: .alert)
let okAction = UIAlertAction(title: AppLocalString.ALERT_YES.localized(), style: UIAlertAction.Style.default) {
UIAlertAction in
if self.listBool == false {
//self.listBool = true
self.callRemoveWishlist(productid :productid, storeId: storeId, indexPath: indexPath)
}
}
let cancelAction = UIAlertAction(title: AppLocalString.Cancel_ORDER.localized(), style: UIAlertAction.Style.cancel) {
UIAlertAction in
NSLog("Cancel Pressed")
}
// Add the actions
alertController.addAction(okAction)
alertController.addAction(cancelAction)
self.present(alertController, animated: true, completion: nil)
}
下面是api删除的代码
func callRemoveWishlist(productid :String, storeId: String, indexPath: IndexPath) {
listBool = true
addLoading(view: view, random: removeRandom)
let addFriendsBaseUrl = AppStrings.baseUrl + AppStrings.addToWishlistAPI
var paramDict = [String : Any]()
paramDict = ["type" : "remove",
"productid" : productid,
"storeid" : "\(storeId)",
"userid" : UserDefaults.standard.value(forKey: AppStrings.userid) ?? ""]
let baseParams = Utility.appendBaseParams(toDict: paramDict as! [String : String])
NetworkResponseManager.getDataFromUrl(url: addFriendsBaseUrl, parameters: baseParams as! [String : String] , completionHandler: {
[weak self]
(response, error) in
self?.listBool = false
if (error == nil) {
if let responseDict = response {
let responseDict = AddToWishlistModel(JSON(responseDict))
self?.removeLoading(view: self?.view, random: self?.removeRandom)
if responseDict.status == 1
{
self?.myWishlistArry?.remove(at: indexPath.row)
self?.myWishListTableView.deleteRows(at: [indexPath], with: .right)
} else {
self?.showToast(message: AppLocalString.OOPS_TEXT.localized())
}
}
} else {
self?.showToast(message: AppLocalString.OOPS_TEXT.localized())
}
})
}
其他表视图代码
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.myWishlistArry?.count ?? 0
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
现在,这段代码是第一次工作,但如果试图删除另一个表示索引超出范围的项,则会导致崩溃。考虑列表T1、T2、T3和T4中是否有四个项
如果我第一次删除T2项indexath.row值是1,那么现在项和行都被删除了,如果我删除另一项,比如T4,indexath.row的值是3而不是2。为什么会发生这种情况?为什么indexPath没有更新?基于整个代码,问题似乎是clojure 如果您在cellForRowAt中的clojure中调用它,则indexpath的值与调用cellForRowAt时设置的值不同。您应该根据愿望列表项的id执行删除操作—删除该项时不会更改 例如,创建如下方法:
func deleteWish(productId: string) {
for i in myWishlistArry ?? [] {
let product = myWishlistArry[i]
if let product.productId == productId {
myWishlistArry?.remove(at: i)
myWishListTableView.deleteRows(at: [IndexPath(row: i, 0)], with: .right)
}
}
}
并调用clojure deleteWishproductId:idOfDeletedProduct根据整个代码,问题似乎出在clojure上 如果您在cellForRowAt中的clojure中调用它,则indexpath的值与调用cellForRowAt时设置的值不同。您应该根据愿望列表项的id执行删除操作—删除该项时不会更改 例如,创建如下方法:
func deleteWish(productId: string) {
for i in myWishlistArry ?? [] {
let product = myWishlistArry[i]
if let product.productId == productId {
myWishlistArry?.remove(at: i)
myWishListTableView.deleteRows(at: [IndexPath(row: i, 0)], with: .right)
}
}
}
并调用clojure deleteWishproductId:idOfDeletedProduct问题在于索引路径被捕获,并且在单元格顺序更改后不会被更新 解决方案: 在单元格中,声明闭包以同时传递单元格
var closureForRemoveBtn : ((UITableViewCell, String, String) -> Void)?
叫它
closureForRemoveBtn?(self, productId, storeId)
在cellForRow中,从实际单元格获取索引路径
或者更简单
var closureForRemoveBtn : ((UITableViewCell) -> Void)?
///
closureForRemoveBtn?(self)
///
myWishlistCell.closureForRemoveBtn = {
[weak self] actualCell in
let actualIndexPath = tableView.indexPath(for: actualCell)!
self?.callAlertViewForRemoved(productid: actualCell.productId, storeId: actualCell.storeid, indexPath: actualIndexPath)
}
问题是索引路径被捕获,并且在单元格顺序更改后不会被更新 解决方案: 在单元格中,声明闭包以同时传递单元格
var closureForRemoveBtn : ((UITableViewCell, String, String) -> Void)?
叫它
closureForRemoveBtn?(self, productId, storeId)
在cellForRow中,从实际单元格获取索引路径
或者更简单
var closureForRemoveBtn : ((UITableViewCell) -> Void)?
///
closureForRemoveBtn?(self)
///
myWishlistCell.closureForRemoveBtn = {
[weak self] actualCell in
let actualIndexPath = tableView.indexPath(for: actualCell)!
self?.callAlertViewForRemoved(productid: actualCell.productId, storeId: actualCell.storeid, indexPath: actualIndexPath)
}
如何调用此代码?api调用成功后,尝试使用DispatchQueue.main.async调用,但仍会崩溃代码本身不会导致崩溃,除非它在捕获索引路径的闭包中执行。请添加上下文代码。单击button@cora重新加载整个表视图和删除动画的效率很低。如何调用此代码?api调用成功后,尝试使用DispatchQueue.main.async调用,但仍然会崩溃代码本身不会导致崩溃,除非它在闭包中执行在其中捕获索引路径。请添加上下文代码。单击button@cora重新加载整个表视图并删除动画的效率很低。