如何在尝试从tableview中删除单元格时修复此崩溃?
调试器显示该行的错误:tableView.deleteRows(at:[selectedIndexPath],with:。auto]
有了这条消息:* 2018-02-05 23:13:42.355696-0800发票[66511:19435120] ***断言失败 - [UITableView _endCellAnimationsWithContext:],/ BuildRoot / Library/Caches / com.apple.xbs / Sources /UIKit_Sim/UIKit-3698.33.6/UITableView.m:2011*
数据从返回json的服务器加载。添加,加载和更新工作正常。
@IBAction func unwindToClients(sender: UIStoryboardSegue) {
if let sourceViewController = sender.source as? ClientViewController,
let client = sourceViewController.client,
let wasDeleted = sourceViewController.wasDeleted {
if(wasDeleted) {
if let selectedIndexPath = tableView.indexPathForSelectedRow {
print("Delteted")
tableArray.remove(at: selectedIndexPath.row)
tableView.deleteRows(at: [selectedIndexPath], with: .automatic)
}
}
else {
if let selectedIndexPath = tableView.indexPathForSelectedRow {
// Update an existing client.
tableArray[selectedIndexPath.row] = client
tableView.reloadRows(at: [selectedIndexPath], with: .automatic)
}
else {
// Add a client.
tableArray.append(client)
}
}
prepareData()
DispatchQueue.main.async {
self.tableView.reloadData()
}
}
}
函数prepareData()对数组进行排序并获取索引(A,B,C ......)
//sorts and makes the index
func prepareData() {
let firstLetters = self.tableArray.map { $0.nameFirstLetter }
let uniqueFirstLetters = Array(Set(firstLetters))
self.sortedFirstLetters = uniqueFirstLetters.sorted()
self.sections = self.sortedFirstLetters.map { firstLetter in
return self.tableArray
.filter { $0.nameFirstLetter == firstLetter }
.sorted { $0.name < $1.name }
}
}
在beginUpdates()
和endUpdates()
之间执行删除操作。
例如 :
tableView.beginUpdates()
tableView.deleteRows(at: [selectedIndexPath], with: .automatic)
tableView.endUpdates()
确保在使用deleteRows
和insertRows
时更新dataSource