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我有一個問題UITableView插入，刪除行。斯威夫特的UITableView，插入，然後刪除，然後再插入
我試圖做一個「Facebook的使者」在UITableView看到效果。我有許多單元，每個單元都指示一條消息，而在它們之間，有許多單元指示目前爲止看過此消息的人。所有這些數據都正確存儲。
現在，我想，當我收到通知，看到從表中刪除可見單元格，然後根據我的數據源（在大多數情況下，最後一個項目）插入適當的索引另一個。當用戶發送消息時，我將他的消息添加到表中，然後刪除他上次看到的單元格，然後在他的消息後重新插入另一個單元格。
現在調試邏輯每一件事是更新數據源，並請求插入，刪除對UITableView OK，但我仍然得到：
終止應用程序由於未捕獲的異常 「NSInternalInconsistencyException」，究其原因： 「無效更新：無效 中的行數爲0節中包含的 現有段的行的更新（36）後的數字必須是更新（36）之前等於包含在該部分 行數，加或減去 從該部分插入或刪除的行數（插入1個， 0已刪除）並加上或減去移入或移出 該部分的行數（移入0，移出0）。
我試圖把調用這個邏輯beginUpdates();和endUpdates();內。所有的插入，刪除被稱爲內main thread (UI)
任何幫助，將不勝感激，非常感謝。
編輯
這裏是我的代碼：
//// Insert a seen status for user, handles seen logic
private func insertSeen(event: UEvent?) -> (removed: Int, inserted: Int) {
// Make a holder for insertion result
var result: (removed: Int, inserted: Int) = (removed: -1, inserted: -1);
// Check if no event was given
if(event == nil){
return result; }
if(event?.creatorID == "" && self.type == .single && self.participants.count > 0){
event?.creatorID = self.participants[0].ID
event?.creatorName = self.participants[0].username;
}
// Get last seen for targeted user
let lastSeen = lastSeenForUser(id: (event?.creatorID)!);
// Get targeted participant
var particiapnt = self.participant(id: event!.creatorID);
// If sender is self -> he will not be found in particiapnts list
// So, we should get it's data from UserData
if(event?.creatorID == UserData.current.ID){
particiapnt = UserData.current;
}
// Check if no event was given
if(particiapnt == nil){
return result; }
let name = particiapnt?.username;
var image = particiapnt?.photo;
if(image != nil) { image = image?.Scale(Width: 20); }
// Store number of events before updates -> usefull to tell if seen has created a new event
let count: Int = self.events.count;
// Check if user has just sent a seen status
if((count > 0 && lastSeen == count - 1) || particiapnt == nil){
// Return a no insertion result [-1,-1]
return result;
}
if(delegate != nil){
delegate.beginUpdates();
}
// Check if user hasn't sent any seen event before
if(lastSeen < 0){
// Check if last event in group is seen
if(self.events.count > 0 && self.events.last?.type == .seen) {
// Add participant to last event
let _ = self.events.last?.addParticipant(id: (event?.creatorID)!, name: name!, image: image);
// Return where this user seen event was added
result = (removed: lastSeen, inserted: self.events.count - 1);
// Check delegate isn't null -> can apply changes
if(delegate != nil){
// Tell delegate about the update
self.delegate.updateEvent(at: result.inserted, event: self.events[result.inserted]);
}
} else {
// If last event is'nt seen -> Create a new one
// Get a basic event
let seen = BasicEvent;
// Set event type as seen
seen?.type = .seen;
// Get where this participant was added
let _ = seen?.addParticipant(id: (event?.creatorID)!, name: name!, image: image);
// Insert the new craeted seen event to events
self.events.append(seen!);
// Return where this user seen event was added
result = (removed: lastSeen, inserted: self.events.count - 1);
// Check delegate isn't null -> can apply changes
if(delegate != nil){
// Tell delegate about the update
self.delegate.addEvent(at: result.inserted, event: event, animation: .fade);
}
}
}
// Handle user has sent a seen event before
else {
// Get where the targeted user has sent his last seen status
let seen = self.events[lastSeen];
// Remove targeted user from his last seen status event
let _ = seen.removeParticipant(id: (event?.creatorID)!);
// If seen is'nt empty yet -> jus t remov current participant
if(seen.participants.count > 0){
// Return where this user seen event was added
result = (removed: lastSeen, inserted: self.events.count - 1);
// Check delegate isn't null -> can apply changes
if(delegate != nil){
// Tell delegate about the update
self.delegate.updateEvent(at: result.removed, event: self.events[result.inserted]);
}
} else {
// Delete empty seen event
self.events.remove(at: lastSeen);
// Return where this user seen event was added
result = (removed: lastSeen, inserted: self.events.count - 1);
// Check delegate isn't null -> can apply changes
if(delegate != nil){
print("coount: \(delegate.getTableView().numberOfRows(inSection: 0)) | 2 ");
// Tell delegate about the update
self.delegate.deleteEvent(at: result.removed, event: self.events[result.removed]);
}
}
// Check if last event in group is seen
if(self.events.count > 0 && self.events.last?.type == .seen) {
// Add participant to last event
let _ = self.events.last?.addParticipant(id: (event?.creatorID)!, name: name!, image: image);
// Return where this user seen event was added
result = (removed: lastSeen, inserted: self.events.count - 1);
// Check delegate isn't null -> can apply changes
if(delegate != nil){
// Tell delegate about the update
self.delegate.updateEvent(at: result.inserted, event: self.events[result.inserted]);
}
} else {
// Get a basic event
let seen = BasicEvent;
// Set event type as seen
seen?.type = .seen;
// Get where this participant was added
let _ = seen?.addParticipant(id: (event?.creatorID)!, name: name!, image: image);
// Insert the new craeted seen event to events
self.events.append(seen!);
// Return where this user seen event was added
result = (removed: lastSeen, inserted: self.events.count - 1)
// Check delegate isn't null -> can apply changes
if(delegate != nil){
// Tell delegate about the update
self.delegate.addEvent(at: result.inserted, event: seen, animation: .fade);
}
}
}
if(delegate != nil){
delegate.endUpdates();
}
// Return final result of this insertion
return result;
}
你刪除你的應用程序的任何行？在重新加載表格之前，可能您已經刪除或刪除了該行。發佈你的代碼..有人可以清楚地指出錯誤 – cole
@cole我已經發布了我的代碼，我不認爲我已經刪除或插入其他地方。 –